UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
FORM 10-Q
QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the quarterly period ended March 31, 20222023
OR
TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the transition period from _____________ to ______________
Commission file number 1-03480
MDU RESOURCES GROUP INC
(Exact name of registrant as specified in its charter)
Delaware30-1133956
(State or other jurisdiction of
incorporation or organization)
(I.R.S. Employer Identification No.)

1200 West Century Avenue
P.O. Box 5650
Bismarck, North Dakota 58506-5650
(Address of principal executive offices)
(Zip Code)
(701) 530-1000
(Registrant's telephone number, including area code)
Securities registered pursuant to Section 12(b) of the Act:
Title of each classTrading symbol(s)Name of each exchange on which registered
Common Stock, par value $1.00 per shareMDUNew York Stock Exchange
Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes  No .
Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes  No .
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act.
Large Accelerated FilerAccelerated Filer
Non-Accelerated FilerSmaller Reporting Company
Emerging Growth Company
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes  No .
Indicate the number of shares outstanding of each of the issuer's classes of common stock, as of April 28, 2022: 203,350,74027, 2023: 203,638,373 shares.
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Definitions
The following abbreviations and acronyms used in this Form 10-Q are defined below:
Abbreviation or Acronym
20212022 Annual ReportCompany's Annual Report on Form 10-K for the year ended December 31, 20212022
AFUDCAllowance for funds used during construction
ASCFASB Accounting Standards Codification
ASUFASB Accounting Standards Update
Big Stone Station475-MW coal-fired electric generating facility near Big Stone City, South Dakota (22.7 percent ownership)
CascadeCascade Natural Gas Corporation, an indirect wholly owned subsidiary of MDU Energy Capital
CentennialCentennial Energy Holdings, Inc., a direct wholly owned subsidiary of the Company
Centennial CapitalCentennial Holdings Capital LLC, a direct wholly owned subsidiary of Centennial
CompanyMDU Resources Group, Inc.
COVID-19Coronavirus disease 2019. In March 2020, the World Health Organization declared the COVID-19 outbreak a pandemic and the President of the United States declared the COVID-19 outbreak a national emergency.
Coyote CreekCoyote Creek Mining Company, LLC, a subsidiary of The North American Coal Corporation
Coyote Station427-MW coal-fired electric generating facility near Beulah, North Dakota (25 percent ownership)
dkDecatherm
Dodd-Frank ActDodd-Frank Wall Street Reform and Consumer Protection Act
EPAUnited States Environmental Protection Agency
Exchange ActSecurities Exchange Act of 1934, as amended
FASBFinancial Accounting Standards Board
FERCFederal Energy Regulatory Commission
FidelityFidelity Exploration & Production Company, a direct wholly owned subsidiary of WBI Holdings (previously referred to as the Company's exploration and production segment)
GAAPAccounting principles generally accepted in the United States of America
GHGGreenhouse gas
Great PlainsGrasslands SubsystemGreat Plains Natural Gas Co., a public utility divisionA portion of Montana-DakotaWBI Energy Transmission's natural gas pipeline that runs from western North Dakota to north central Wyoming
IntermountainIntermountain Gas Company, an indirect wholly owned subsidiary of MDU Energy Capital
IPUCIdaho Public Utilities Commission
IRAInflation Reduction Act of 2022
IRSInternal Revenue Service
Knife RiverKnife River Corporation, a direct wholly owned subsidiary of Centennial
Knife River Holding CompanyA wholly owned subsidiary of the Company that was established in conjunction with the proposed separation of Knife River
kWhKilowatt-hour
kVKilovolt
LIBORLondon Inter-bank Offered Rate
MDU Construction ServicesMDU Construction Services Group, Inc., a direct wholly owned subsidiary of Centennial
MDU Energy CapitalMDU Energy Capital, LLC, a direct wholly owned subsidiary of the Company
MISOMidcontinent Independent System Operator, Inc., the organization that provides open-access transmission services and monitors the high-voltage transmission system in the Midwest United States and Manitoba, Canada and a southern United States region which includes much of Arkansas, Mississippi, and Louisiana.
MMcfMillion cubic feet
MMdkMillion dk
MNPUCMinnesota Public Utilities Commission
Montana-DakotaMontana-Dakota Utilities Co., a direct wholly owned subsidiary of MDU Energy Capital
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MTPSCMontana Public Service Commission
MWMegawatt
NDDEQNorth Dakota Department of Environmental Quality
NDPSCNorth Dakota Public Service Commission
NERCNorth American Electric Reliability Corporation
OilIncludes crude oil and condensate
PHMSAPipeline and Hazardous Materials Safety Administration
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Regional Haze RuleThe EPA developed the Regional Haze Rule requiring states to develop and implement comprehensive plans to reduce human-caused regional haze in designated areas such as national parks and wilderness areas.
SDPUCSouth Dakota Public Utilities Commission
SECUnited States Securities and Exchange Commission
Securities ActSecurities Act of 1933, as amended
SOFRSecured Overnight Financing Rate
UAUnited Association of Journeyman and Apprentices of the Plumbing and Pipefitting Industry of the United States of America and Canada
VIEVariable interest entity
Washington DOEWashington State Department of Ecology
WBI EnergyWBI Energy, Inc., an indirect wholly owned subsidiary of WBI Holdings
WBI Energy TransmissionWBI Energy Transmission, Inc., an indirect wholly owned subsidiary of WBI Holdings
WBI HoldingsWBI Holdings, Inc., a direct wholly owned subsidiary of Centennial
WUTCWashington Utilities and Transportation Commission
Wygen III100-MW coal-fired electric generating facility near Gillette, Wyoming (25 percent ownership)
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Introduction
The Company's mission is to deliver superior value to stakeholders by providing essential infrastructure and services to America. The Company is agenerates, transmits and distributes electricity and provides natural gas distribution, transportation and storage services that are regulated energy deliveryby state public service commissions and/or the FERC. The Company also provides construction services through its electrical and mechanical and transmission and distribution specialty contracting services, and provides construction materials and associated contracting services business. Its principal executive offices are located at 1200 West Century Avenue, P.O. Box 5650, Bismarck, North Dakota 58506-5650, telephone (701) 530-1000.through aggregate mining and marketing of related products, such as ready-mix concrete, asphalt and asphalt oil.
Montana-Dakota was incorporated under the state laws of Delaware in 1924. The Company was incorporated under the state laws of Delaware in 2018 upon2018. Upon the completion of an internal holding company reorganization, which resulted in Montana-Dakota becomingbecame a subsidiary of the Company. Its principal executive offices are located at 1200 West Century Avenue, P.O. Box 5650, Bismarck, North Dakota 58506-5650, telephone (701) 530-1000.
As part of the Company's continuous review of its business, the Company announced strategic initiatives in 2022 that are expected to enhance its value. On August 4, 2022, the Company announced that its board of directors approved a plan to pursue the separation of Knife River, the construction materials and contracting segment, from the Company. The separation will result in two independent, publicly traded companies, MDU Resources Group, Inc. and Knife River Holding Company, and is expected to be completed on May 31, 2023, subject to certain conditions, including the SEC declaring the Registration Statement on Form 10 for Knife River Holding Company to be effective. On May 3, 2023, the Company's board of directors approved the separation and the distribution of approximately 90 percent of the issued and outstanding shares of Knife River Holding Company to the Company's stockholders. Stockholders of the Company will receive one share of Knife River Holding Company common stock for every four shares of the Company's common stock held on May 22, 2023, the record date for the distribution. The Company will retain approximately 10 percent of Knife River Holding Company's common stock immediately following the separation with the intent to dispose of such shares within twelve months after the separation. Prior to completing the separation, the Company may adjust the percentage of Knife River Holding Company common stock to be distributed to the Company's stockholders and retained by the Company in response to market and other factors. The separation of Knife River is planned as a tax-free spinoff transaction to the Company’s stockholders for U.S. federal income tax purposes. More information on the separation and distribution can be found within the Form 10, which is not incorporated by reference herein.
The Company's mission isfinancial results for the first quarter ended March 31, 2023, include Knife River. Upon completion of the separation, the historical results of Knife River will be presented as discontinued operations in the Company's Consolidated Financial Statements.
On November 3, 2022, the Company announced its intention to deliver superior value to stakeholders by providing essential infrastructure and services to America. The Company's strategy is to deliver superior value with a two-platform model ofcreate two pure-play publicly traded companies, one focused on regulated energy delivery and the other on construction materials, and services, while pursuing organic growth opportunities and strategic acquisitions of well-managed companies and properties. Each ofthat, to achieve this future structure, the Company's platforms are comprisedboard of different operating segments. Mostdirectors authorized management to commence a strategic review process of these segments experience seasonality related to the industries in which they operate.MDU Construction Services. The two-platform approach helps balance this seasonalitystrategic review is underway and the risks associated with each typeCompany anticipates completing the strategic review during the second quarter of industry. Through its regulated energy delivery platform, the Company generates, transmits and distributes electricity and provides natural gas distribution, transportation and storage services. These businesses are regulated by state public service commissions and/or the FERC. The construction materials and services platform provides construction services to a variety of industries, including commercial, industrial and utility customers, and provides construction materials through aggregate mining and marketing of related products, such as ready-mix concrete, asphalt and asphalt oil.2023.
The Company is organized into five reportable business segments. These business segments include: electric, natural gas distribution, pipeline, construction materials and contracting, and construction services. The Company's business segments are determined based on the Company's method of internal reporting, which generally segregates the strategic business units due to differences in products, services and regulation. The internal reporting of these segments is defined based on the reporting and review process used by the Company's chief executive officer.
The Company, through its wholly owned subsidiary, MDU Energy Capital, owns Montana-Dakota, Cascade and Intermountain. The electric segment is comprised of Montana-Dakota while the natural gas distribution segment is comprised of Montana-Dakota, Cascade and Intermountain.
The Company, through its wholly owned subsidiary, Centennial, owns WBI Energy, Knife River, MDU Construction Services and Centennial Capital. WBI Energy is the pipeline segment, Knife River is the construction materials and contracting segment, MDU Construction Services is the construction services segment and Centennial Capital is reflected in the Other category.
For more information on the Company's business segments, see Note 17 of the Notes to Consolidated Financial Statements.
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Part I -- Financial Information
Item 1. Financial Statements
MDU Resources Group, Inc.
Consolidated Statements of IncomeConsolidated Statements of IncomeConsolidated Statements of Income
(Unaudited)(Unaudited)(Unaudited)
Three Months EndedThree Months Ended
March 31, March 31,
20222021 20232022
(In thousands, except per share amounts) (In thousands, except per share amounts)
Operating revenues:Operating revenues: Operating revenues: 
Electric, natural gas distribution and regulated pipelineElectric, natural gas distribution and regulated pipeline$553,456 $442,381 Electric, natural gas distribution and regulated pipeline$673,757 $553,456 
Non-regulated pipeline, construction materials and contracting, construction services and otherNon-regulated pipeline, construction materials and contracting, construction services and other863,103 785,557 Non-regulated pipeline, construction materials and contracting, construction services and other1,063,580 863,103 
Total operating revenues Total operating revenues 1,416,559 1,227,938 Total operating revenues 1,737,337 1,416,559 
Operating expenses:Operating expenses: Operating expenses: 
Operation and maintenance:Operation and maintenance: Operation and maintenance: 
Electric, natural gas distribution and regulated pipelineElectric, natural gas distribution and regulated pipeline97,665 94,333 Electric, natural gas distribution and regulated pipeline101,866 97,665 
Non-regulated pipeline, construction materials and contracting, construction services and otherNon-regulated pipeline, construction materials and contracting, construction services and other810,232 717,326 Non-regulated pipeline, construction materials and contracting, construction services and other1,002,876 810,232 
Total operation and maintenanceTotal operation and maintenance907,897 811,659 Total operation and maintenance1,104,742 907,897 
Purchased natural gas soldPurchased natural gas sold267,353 176,237 Purchased natural gas sold371,015 267,353 
Depreciation, depletion and amortizationDepreciation, depletion and amortization80,121 73,723 Depreciation, depletion and amortization81,862 80,121 
Taxes, other than incomeTaxes, other than income67,484 62,534 Taxes, other than income80,890 67,484 
Electric fuel and purchased powerElectric fuel and purchased power26,361 18,621 Electric fuel and purchased power24,356 26,361 
Total operating expensesTotal operating expenses1,349,216 1,142,774 Total operating expenses1,662,865 1,349,216 
Operating incomeOperating income67,343 85,164 Operating income74,472 67,343 
Other income (expense)Other income (expense)(2,400)3,354 Other income (expense)10,868 (2,400)
Interest expenseInterest expense25,260 23,453 Interest expense38,020 25,260 
Income before income taxesIncome before income taxes39,683 65,065 Income before income taxes47,320 39,683 
Income taxesIncome taxes7,950 12,949 Income taxes8,977 7,950 
Income from continuing operationsIncome from continuing operations31,733 52,116 Income from continuing operations38,343 31,733 
Income from discontinued operations, net of tax30 15 
Discontinued operations, net of taxDiscontinued operations, net of tax10 30 
Net incomeNet income$31,763 $52,131 Net income$38,353 $31,763 
Earnings per share - basic:Earnings per share - basic: Earnings per share - basic: 
Income from continuing operationsIncome from continuing operations$.16 $.26 Income from continuing operations$.19 $.16 
Discontinued operations, net of taxDiscontinued operations, net of tax— — Discontinued operations, net of tax— — 
Earnings per share - basicEarnings per share - basic$.16 $.26 Earnings per share - basic$.19 $.16 
Earnings per share - diluted:Earnings per share - diluted: Earnings per share - diluted: 
Income from continuing operationsIncome from continuing operations$.16 $.26 Income from continuing operations$.19 $.16 
Discontinued operations, net of taxDiscontinued operations, net of tax— — Discontinued operations, net of tax— — 
Earnings per share - dilutedEarnings per share - diluted$.16 $.26 Earnings per share - diluted$.19 $.16 
Weighted average common shares outstanding - basicWeighted average common shares outstanding - basic203,351 200,708 Weighted average common shares outstanding - basic203,624 203,351 
Weighted average common shares outstanding - dilutedWeighted average common shares outstanding - diluted203,391 200,952 Weighted average common shares outstanding - diluted203,910 203,391 
The accompanying notes are an integral part of these consolidated financial statements.
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MDU Resources Group, Inc.MDU Resources Group, Inc.MDU Resources Group, Inc.
Consolidated Statements of Comprehensive IncomeConsolidated Statements of Comprehensive IncomeConsolidated Statements of Comprehensive Income
(Unaudited)(Unaudited)(Unaudited)
Three Months EndedThree Months Ended
March 31, March 31,
20222021 20232022
(In thousands) (In thousands)
Net incomeNet income$31,763 $52,131 Net income$38,353 $31,763 
Other comprehensive income:Other comprehensive income:Other comprehensive income:
Reclassification adjustment for loss on derivative instruments included in net income, net of tax of $36 and $37 for the three months ended in 2022 and 2021, respectively112 111 
Amortization of postretirement liability losses included in net periodic benefit credit, net of tax of $164 and $151 for the three months ended in 2022 and 2021, respectively445 466 
Net unrealized loss on available-for-sale investments:
Net unrealized loss on available-for-sale investments arising during the period, net of tax of $(85) and $(12) for the three months ended in 2022 and 2021, respectively(320)(44)
Reclassification adjustment for loss on available-for-sale investments included in net income, net of tax of $8 and $9 for the three months ended in 2022 and 2021, respectively32 35 
Net unrealized loss on available-for-sale investments(288)(9)
Reclassification adjustment for loss on derivative instruments included in net income, net of tax of $11 and $36 for the three months ended in 2023 and 2022, respectivelyReclassification adjustment for loss on derivative instruments included in net income, net of tax of $11 and $36 for the three months ended in 2023 and 2022, respectively34 112 
Postretirement liability adjustment:Postretirement liability adjustment:
Amortization of postretirement liability losses included in net periodic benefit credit, net of tax of $34 and $164 for the three months ended in 2023 and 2022, respectivelyAmortization of postretirement liability losses included in net periodic benefit credit, net of tax of $34 and $164 for the three months ended in 2023 and 2022, respectively100 445 
Net unrealized gain (loss) on available-for-sale investments:Net unrealized gain (loss) on available-for-sale investments:
Net unrealized gain (loss) on available-for-sale investments arising during the period, net of tax of $19 and $(85) for the three months ended in 2023 and 2022, respectivelyNet unrealized gain (loss) on available-for-sale investments arising during the period, net of tax of $19 and $(85) for the three months ended in 2023 and 2022, respectively70 (320)
Reclassification adjustment for loss on available-for-sale investments included in net income, net of tax of $3 and $8 for the three months ended in 2023 and 2022, respectivelyReclassification adjustment for loss on available-for-sale investments included in net income, net of tax of $3 and $8 for the three months ended in 2023 and 2022, respectively13 32 
Net unrealized gain (loss) on available-for-sale investmentsNet unrealized gain (loss) on available-for-sale investments83 (288)
Other comprehensive incomeOther comprehensive income269 568 Other comprehensive income217 269 
Comprehensive income attributable to common stockholdersComprehensive income attributable to common stockholders$32,032 $52,699 Comprehensive income attributable to common stockholders$38,570 $32,032 
The accompanying notes are an integral part of these consolidated financial statements.
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MDU Resources Group, Inc.MDU Resources Group, Inc.MDU Resources Group, Inc.
Consolidated Balance SheetsConsolidated Balance SheetsConsolidated Balance Sheets
(Unaudited)(Unaudited)(Unaudited)
March 31, 2022March 31, 2021December 31, 2021 March 31, 2023March 31, 2022December 31, 2022
AssetsAssets(In thousands, except shares and per share amounts)Assets(In thousands, except shares and per share amounts)
Current assets:Current assets: Current assets: 
Cash and cash equivalentsCash and cash equivalents$64,904 $55,094 $54,161 Cash and cash equivalents$93,189 $64,904 $80,517 
Receivables, netReceivables, net948,024 784,582 946,741 Receivables, net1,291,949 948,024 1,305,642 
InventoriesInventories380,316 316,737 335,609 Inventories425,834 380,316 387,525 
Current regulatory assetsCurrent regulatory assets89,078 98,452 118,691 Current regulatory assets216,318 89,078 165,092 
Prepayments and other current assetsPrepayments and other current assets89,586 68,409 95,741 Prepayments and other current assets81,424 89,586 72,972 
Total current assetsTotal current assets1,571,908 1,323,274 1,550,943 Total current assets2,108,714 1,571,908 2,011,748 
Noncurrent assets:Noncurrent assets: Noncurrent assets: 
Property, plant and equipmentProperty, plant and equipment8,958,600 8,288,879 8,972,849 Property, plant and equipment9,475,608 8,958,600 9,364,038 
Less accumulated depreciation, depletion and amortizationLess accumulated depreciation, depletion and amortization3,158,091 3,096,371 3,216,461 Less accumulated depreciation, depletion and amortization3,322,894 3,158,091 3,272,493 
Net property, plant and equipmentNet property, plant and equipment5,800,509 5,192,508 5,756,388 Net property, plant and equipment6,152,714 5,800,509 6,091,545 
GoodwillGoodwill763,262 714,963 765,386 Goodwill763,500 763,262 763,500 
Other intangible assets, netOther intangible assets, net21,389 23,961 22,578 Other intangible assets, net16,334 21,389 17,532 
Regulatory assetsRegulatory assets359,228 379,917 357,851 Regulatory assets349,500 359,228 329,659 
InvestmentsInvestments174,555 167,741 175,476 Investments172,467 174,555 161,913 
Operating lease right-of-use assetsOperating lease right-of-use assets119,845 116,663 124,138 Operating lease right-of-use assets118,052 119,845 119,375 
OtherOther160,019 150,248 157,675 Other161,306 160,019 165,509 
Total noncurrent assets Total noncurrent assets 7,398,807 6,746,001 7,359,492 Total noncurrent assets 7,733,873 7,398,807 7,649,033 
Total assetsTotal assets$8,970,715 $8,069,275 $8,910,435 Total assets$9,842,587 $8,970,715 $9,660,781 
Liabilities and Stockholders' EquityLiabilities and Stockholders' Equity Liabilities and Stockholders' Equity 
Current liabilities:Current liabilities: Current liabilities: 
Short-term borrowingsShort-term borrowings$99,958 $50,000 $— Short-term borrowings$501,500 $99,958 $246,500 
Long-term debt due within one yearLong-term debt due within one year147,953 1,552 148,053 Long-term debt due within one year78,031 147,953 78,031 
Accounts payableAccounts payable449,746 379,348 478,933 Accounts payable547,188 449,746 657,168 
Taxes payableTaxes payable90,572 88,711 80,372 Taxes payable73,914 90,572 70,810 
Dividends payableDividends payable44,229 42,740 44,229 Dividends payable45,306 44,229 45,245 
Accrued compensationAccrued compensation64,796 69,612 81,904 Accrued compensation65,509 64,796 88,662 
Operating lease liabilities due within one yearOperating lease liabilities due within one year34,618 32,562 35,368 Operating lease liabilities due within one year34,975 34,618 34,516 
Regulatory liabilities due within one yearRegulatory liabilities due within one year31,186 34,266 16,303 Regulatory liabilities due within one year44,395 31,186 26,440 
Other accrued liabilitiesOther accrued liabilities203,670 201,246 207,078 Other accrued liabilities245,511 203,670 232,231 
Total current liabilities Total current liabilities 1,166,728 900,037 1,092,240 Total current liabilities 1,636,329 1,166,728 1,479,603 
Noncurrent liabilities:Noncurrent liabilities: Noncurrent liabilities: 
Long-term debtLong-term debt2,599,810 2,251,722 2,593,847 Long-term debt2,769,037 2,599,810 2,763,394 
Deferred income taxesDeferred income taxes587,940 528,551 591,962 Deferred income taxes642,069 587,940 631,303 
Asset retirement obligationsAsset retirement obligations463,080 445,170 458,061 Asset retirement obligations409,547 463,080 405,885 
Regulatory liabilitiesRegulatory liabilities433,628 429,060 428,790 Regulatory liabilities454,669 433,628 448,454 
Operating lease liabilitiesOperating lease liabilities85,874 84,494 89,253 Operating lease liabilities83,632 85,874 85,534 
OtherOther272,937 329,935 273,408 Other271,922 272,937 259,479 
Total noncurrent liabilities Total noncurrent liabilities 4,443,269 4,068,932 4,435,321 Total noncurrent liabilities 4,630,876 4,443,269 4,594,049 
Commitments and contingenciesCommitments and contingencies0Commitments and contingencies
Stockholders' equity:
Stockholders' equity:
 
Stockholders' equity:
 
Common stock
Authorized - 500,000,000 shares, $1.00 par value
Shares issued - 203,889,661 at March 31, 2022, 201,733,458 at
March 31, 2021 and 203,889,661 at December 31, 2021
203,889 201,733 203,889 
Common stock
Authorized - 500,000,000 shares, $1.00 par value
Shares issued - 204,162,814 at March 31, 2023, 203,889,661 at
March 31, 2022 and 204,162,814 at December 31, 2022
Common stock
Authorized - 500,000,000 shares, $1.00 par value
Shares issued - 204,162,814 at March 31, 2023, 203,889,661 at
March 31, 2022 and 204,162,814 at December 31, 2022
204,163 203,889 204,163 
Other paid-in capitalOther paid-in capital1,451,464 1,382,158 1,461,205 Other paid-in capital1,461,294 1,451,464 1,466,037 
Retained earningsRetained earnings1,749,726 1,567,551 1,762,410 Retained earnings1,943,917 1,749,726 1,951,138 
Accumulated other comprehensive lossAccumulated other comprehensive loss(40,735)(47,510)(41,004)Accumulated other comprehensive loss(30,366)(40,735)(30,583)
Treasury stock at cost - 538,921 sharesTreasury stock at cost - 538,921 shares(3,626)(3,626)(3,626)Treasury stock at cost - 538,921 shares(3,626)(3,626)(3,626)
Total stockholders' equityTotal stockholders' equity3,360,718 3,100,306 3,382,874 Total stockholders' equity3,575,382 3,360,718 3,587,129 
Total liabilities and stockholders' equity Total liabilities and stockholders' equity $8,970,715 $8,069,275 $8,910,435 Total liabilities and stockholders' equity $9,842,587 $8,970,715 $9,660,781 
The accompanying notes are an integral part of these consolidated financial statements.
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MDU Resources Group, Inc.MDU Resources Group, Inc.MDU Resources Group, Inc.
Consolidated Statements of EquityConsolidated Statements of EquityConsolidated Statements of Equity
(Unaudited)(Unaudited)(Unaudited)
Other
Paid-in
Capital
Retained EarningsAccumu-lated
Other
Compre-hensive
Loss
Other
Paid-in
Capital
Retained EarningsAccumu-lated
Other
Compre-hensive
Loss
Common StockTreasury StockCommon StockTreasury Stock
SharesAmountSharesAmountTotalSharesAmountSharesAmountTotal
(In thousands, except shares) (In thousands, except shares)
At December 31, 2021203,889,661 $203,889 $1,461,205 $1,762,410 $(41,004)(538,921)$(3,626)$3,382,874 
At December 31, 2022At December 31, 2022204,162,814 $204,163 $1,466,037 $1,951,138 $(30,583)(538,921)$(3,626)$3,587,129 
Net incomeNet income— — — 31,763 — — — 31,763 Net income— — — 38,353 — — — 38,353 
Other comprehensive incomeOther comprehensive income— — — — 269 — — 269 Other comprehensive income— — — — 217 — — 217 
Dividends declared on common stockDividends declared on common stock— — — (44,447)— — — (44,447)Dividends declared on common stock— — — (45,574)— — — (45,574)
Stock-based compensationStock-based compensation— — 2,689 — — — — 2,689 Stock-based compensation— — 3,108 — — — — 3,108 
Repurchase of common stockRepurchase of common stock— — — — — (266,821)(7,399)(7,399)Repurchase of common stock— — — — — (153,622)(4,811)(4,811)
Issuance of common stock upon vesting of stock-based compensation, net of shares used for tax withholdingsIssuance of common stock upon vesting of stock-based compensation, net of shares used for tax withholdings— — (12,303)— — 266,821 7,399 (4,904)Issuance of common stock upon vesting of stock-based compensation, net of shares used for tax withholdings— — (7,851)— — 153,622 4,811 (3,040)
Issuance of common stock— — (127)— — — — (127)
At March 31, 2022203,889,661 $203,889 $1,451,464 $1,749,726 $(40,735)(538,921)$(3,626)$3,360,718 
At March 31, 2023At March 31, 2023204,162,814 $204,163 $1,461,294 $1,943,917 $(30,366)(538,921)$(3,626)$3,575,382 

Other
Paid-in
Capital
Retained EarningsAccumu-lated
Other
Compre-hensive
Loss
Other
Paid-in
Capital
Retained EarningsAccumu-lated
Other
Compre-hensive
Loss
Common StockTreasury StockCommon StockAccumu-lated
Other
Compre-hensive
Loss
Treasury Stock
SharesAmountSharesAmountTotalAccumu-lated
Other
Compre-hensive
Loss
SharesAmountTotal
(In thousands, except shares) (In thousands, except shares)
At December 31, 2020201,061,198 $201,061 $1,371,385 $1,558,363 $(48,078)(538,921)$(3,626)$3,079,105 
At December 31, 2021At December 31, 2021203,889,661 $203,889 $1,461,205 $1,762,410 $(41,004)(538,921)$(3,626)$3,382,874 
Net incomeNet income— — — 52,131 — — — 52,131 Net income— — — 31,763 — — — 31,763 
Other comprehensive incomeOther comprehensive income— — — — 568 — — 568 Other comprehensive income— — — — 269 — — 269 
Dividends declared on common stockDividends declared on common stock— — — (42,943)— — — (42,943)Dividends declared on common stock— — — (44,447)— — — (44,447)
Stock-based compensationStock-based compensation— — 2,574 — — — — 2,574 Stock-based compensation— — 2,689 — — — — 2,689 
Repurchase of common stockRepurchase of common stock— — — — — (392,294)(6,701)(6,701)Repurchase of common stock— — — — — (266,821)(7,399)(7,399)
Issuance of common stock upon vesting of stock-based compensation, net of shares used for tax withholdingsIssuance of common stock upon vesting of stock-based compensation, net of shares used for tax withholdings— — (10,828)— — 392,294 6,701 (4,127)Issuance of common stock upon vesting of stock-based compensation, net of shares used for tax withholdings— — (12,303)— — 266,821 7,399 (4,904)
Issuance of common stockIssuance of common stock672,260 672 19,027 — — — — 19,699 Issuance of common stock— — (127)— — — — (127)
At March 31, 2021201,733,458 $201,733 $1,382,158 $1,567,551 $(47,510)(538,921)$(3,626)$3,100,306 
At March 31, 2022At March 31, 2022203,889,661 $203,889 $1,451,464 $1,749,726 $(40,735)(538,921)$(3,626)$3,360,718 
The accompanying notes are an integral part of these consolidated financial statements.
9

Index
MDU Resources Group, Inc.MDU Resources Group, Inc.MDU Resources Group, Inc.
Consolidated Statements of Cash FlowsConsolidated Statements of Cash FlowsConsolidated Statements of Cash Flows
(Unaudited)(Unaudited)(Unaudited)
Three Months EndedThree Months Ended
March 31, March 31,
20222021 20232022
(In thousands) (In thousands)
Operating activities:Operating activities: Operating activities: 
Net incomeNet income$31,763 $52,131 Net income$38,353 $31,763 
Income from discontinued operations, net of tax30 15 
Discontinued operations, net of taxDiscontinued operations, net of tax10 30 
Income from continuing operationsIncome from continuing operations31,733 52,116 Income from continuing operations38,343 31,733 
Adjustments to reconcile net income to net cash provided by operating activities: 
Adjustments to reconcile net income to net cash provided by (used in) operating activities:Adjustments to reconcile net income to net cash provided by (used in) operating activities: 
Depreciation, depletion and amortizationDepreciation, depletion and amortization80,121 73,723 Depreciation, depletion and amortization81,862 80,121 
Deferred income taxesDeferred income taxes(6,466)9,843 Deferred income taxes8,856 (6,466)
Provision for credit lossesProvision for credit losses1,735 (317)Provision for credit losses4,193 1,735 
Amortization of debt issuance costsAmortization of debt issuance costs341 332 Amortization of debt issuance costs380 341 
Employee stock-based compensation costsEmployee stock-based compensation costs2,689 2,574 Employee stock-based compensation costs3,108 2,689 
Pension & postretirement benefit plan net periodic benefit credit(1,491)(1,226)
Unrealized losses on investments5,147 529 
Pension and postretirement benefit plan net periodic benefit creditPension and postretirement benefit plan net periodic benefit credit(1,090)(1,491)
Unrealized (gains) losses on investmentsUnrealized (gains) losses on investments(3,957)5,147 
Gains on sales of assetsGains on sales of assets(3,136)(2,919)Gains on sales of assets(4,361)(3,136)
Changes in current assets and liabilities, net of acquisitions:Changes in current assets and liabilities, net of acquisitions: Changes in current assets and liabilities, net of acquisitions: 
ReceivablesReceivables(5,723)89,724 Receivables14,969 (5,723)
InventoriesInventories(44,080)(25,613)Inventories(40,885)(44,080)
Other current assetsOther current assets34,491 (46,837)Other current assets(58,308)34,491 
Accounts payableAccounts payable2,980 (41,965)Accounts payable(93,549)2,980 
Other current liabilitiesOther current liabilities13,086 (13,977)Other current liabilities16,715 13,086 
Pension & postretirement benefit plan contributions(149)(119)
Pension and postretirement benefit plan contributionsPension and postretirement benefit plan contributions(159)(149)
Other noncurrent changesOther noncurrent changes1,139 (223)Other noncurrent changes(9,794)1,139 
Net cash provided by continuing operations112,417 95,645 
Net cash used in discontinued operations(7)(25)
Net cash provided by operating activities112,410 95,620 
Net cash provided by (used in) continuing operationsNet cash provided by (used in) continuing operations(43,677)112,417 
Net cash provided by (used in) discontinued operationsNet cash provided by (used in) discontinued operations29 (7)
Net cash provided by (used in) operating activitiesNet cash provided by (used in) operating activities(43,648)112,410 
Investing activities:Investing activities: Investing activities: 
Capital expendituresCapital expenditures(150,288)(111,091)Capital expenditures(154,049)(150,288)
Acquisitions, net of cash acquiredAcquisitions, net of cash acquired(524)(1,023)Acquisitions, net of cash acquired— (524)
Net proceeds from sale or disposition of property and otherNet proceeds from sale or disposition of property and other4,586 9,035 Net proceeds from sale or disposition of property and other7,282 4,586 
InvestmentsInvestments(4,442)(3,248)Investments(4,257)(4,442)
Net cash used in investing activitiesNet cash used in investing activities(150,668)(106,327)Net cash used in investing activities(151,024)(150,668)
Financing activities:Financing activities: Financing activities: 
Issuance of short-term borrowingsIssuance of short-term borrowings100,000 50,000 Issuance of short-term borrowings275,000 100,000 
Repayment of short-term borrowingsRepayment of short-term borrowings— (50,000)Repayment of short-term borrowings(20,000)— 
Issuance of long-term debtIssuance of long-term debt150,000 93,298 Issuance of long-term debt175,446 150,000 
Repayment of long-term debtRepayment of long-term debt(143,622)(53,301)Repayment of long-term debt(169,891)(143,622)
Debt issuance costsDebt issuance costs(718)(3)Debt issuance costs(114)(718)
Net proceeds from issuance of common stockNet proceeds from issuance of common stock(127)19,699 Net proceeds from issuance of common stock— (127)
Dividends paidDividends paid(44,229)(42,611)Dividends paid(45,246)(44,229)
Repurchase of common stockRepurchase of common stock(7,399)(6,701)Repurchase of common stock(4,811)(7,399)
Tax withholding on stock-based compensationTax withholding on stock-based compensation(4,904)(4,127)Tax withholding on stock-based compensation(3,040)(4,904)
Net cash provided by financing activitiesNet cash provided by financing activities49,001 6,254 Net cash provided by financing activities207,344 49,001 
Increase (decrease) in cash and cash equivalents10,743 (4,453)
Increase in cash and cash equivalentsIncrease in cash and cash equivalents12,672 10,743 
Cash and cash equivalents -- beginning of yearCash and cash equivalents -- beginning of year54,161 59,547 Cash and cash equivalents -- beginning of year80,517 54,161 
Cash and cash equivalents -- end of periodCash and cash equivalents -- end of period$64,904 $55,094 Cash and cash equivalents -- end of period$93,189 $64,904 
The accompanying notes are an integral part of these consolidated financial statements.
10

Index
MDU Resources Group, Inc.
Notes to Consolidated
Financial Statements
March 31, 20222023 and 20212022
(Unaudited)
Note 1 - Basis of presentation
The accompanying consolidated interim financial statements were prepared in accordance with GAAP for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Interim financial statements do not include all disclosures provided in annual financial statements and, accordingly, these financial statements should be read in conjunction with those appearing in the 20212022 Annual Report. The information is unaudited but includes all adjustments that are, in the opinion of management, necessary for a fair presentation of the accompanying consolidated interim financial statements and are of a normal recurring nature. Depreciation, depletion and amortization expense is reported separately on the Consolidated Statements of Income and therefore is excluded from the other line items within operating expenses.
The assets and liabilitiesAs part of the Company's continuous review of its business, the Company announced strategic initiatives in 2022 that are expected to enhance its value. On August 4, 2022, the Company announced that its board of directors approved a plan to pursue the separation of Knife River, the construction materials and contracting segment, from the Company. The separation will result in two independent, publicly traded companies, MDU Resources Group, Inc. and Knife River Holding Company, and is expected to be completed on May 31, 2023, subject to certain conditions, including the SEC declaring the Registration Statement on Form 10 for Knife River Holding Company to be effective. On May 3, 2023, the Company's board of directors approved the separation and the distribution of approximately 90 percent of the issued and outstanding shares of Knife River Holding Company to the Company's stockholders. Stockholders of the Company will receive one share of Knife River Holding Company common stock for every four shares of the Company's common stock held on May 22, 2023, the record date for the distribution. The Company will retain approximately 10 percent of Knife River Holding Company's common stock immediately following the separation with the intent to dispose of such shares within twelve months after the separation. Prior to completing the separation, the Company may adjust the percentage of Knife River Holding Company common stock to be distributed to the Company's stockholders and retained by the Company in response to market and other factors. The separation of Knife River is planned as a tax-free spinoff transaction to the Company’s stockholders for U.S. federal income tax purposes.
The Company's financial results for the quarter ended March 31, 2023, include Knife River. Upon completion of the separation, the historical results of Knife River will be presented as discontinued operations have been classified as held for salein the Company's Consolidated Financial Statements.
On November 3, 2022, the Company announced its intention to create two pure-play publicly traded companies, one focused on regulated energy delivery and are included in prepaymentsthe other on construction materials, and other current assets, noncurrent assets - otherthat, to achieve this future structure, the Company's board of directors authorized management to commence a strategic review process of MDU Construction Services. The strategic review is underway and other accrued liabilities on the Consolidated Balance Sheets. The results andCompany anticipates completing the strategic review during the second quarter of 2023.
Discontinued operations include the supporting activities of Fidelity and are shown in income from discontinued operations on the Consolidated Statements of Income. Unless otherwise indicated, the amounts presented in the accompanying notes to the consolidated financial statements relate to the Company's continuing operations.
In the fourth quarter of 2021, the Company made changes to the presentation of the Consolidated Statements of Cash Flows to provide further clarity on the sources and uses of net cash provided by operating activities and net cash provided by (used in) financing activities. Certain prior period amounts have been reclassified to conform to the current year presentation. These reclassifications did not impact total net cash provided by operating activities or net cash provided by financing activities for the three months ended March 31, 2021.
Management has also evaluated the impact of events occurring after March 31, 2022,2023, up to the date of the issuance of these consolidated interim financial statements on May 5, 2022,4, 2023, that would require recognition or disclosure in the Consolidated Financial Statements.
11

Index
Note 2 - New accounting standards
The following table provides a brief description of the accounting pronouncements applicable to the Company and the potential impact on its Consolidated Financial Statements and/or disclosures:
StandardDescriptionEffective dateImpact on financial statements/disclosures
ASU 2021-10 - Government AssistanceIn November 2021, the FASB issued guidance on modifying the disclosure requirements to increase the transparency of government assistance including disclosure of the types of assistance, an entity'sRecently adopted accounting for the assistance and the effect of the assistance on an entity's financial statements.January 1, 2022The Company is currently evaluating the impact the guidance will have on its disclosures for the year ended December 31, 2022.standards
ASU 2020-04 - Reference Rate ReformIn March 2020, the FASB issued optional guidance to ease the facilitation of the effects of reference rate reform on financial reporting. The guidance applies to certain contract modifications, hedging relationships and other transactions that reference LIBOR or another reference rate expected to be discontinued because of reference rate reform. Beginning January 1, 2022, LIBOR or other discontinued reference rates cannot be applied to new contracts. New contracts will incorporate a new reference rate, which includes SOFR. LIBOR or other discontinued reference rates cannot be applied to contract modifications or hedging relationships entered into or evaluated after December 31, 2022. Existing contracts referencing LIBOR or other reference rates expected to be discontinued must identify a replacement rate by June 30, 2023.Effective as of March 12, 2020 and will continue through December 31, 2022For more information, see ASU 2022-06 - Reference Rate Reform: Deferral of Sunset Date in recently issued accounting standards not yet adopted.
Recently issued accounting standards not yet adopted
ASU 2022-06 - Reference Rate Reform: Deferral of Sunset DateIn December 2022, the FASB included a sunset provision within ASC 848 based on expectations of when LIBOR would cease being published. At the time ASU 2020-04 was issued, the UK Financial Conduct Authority had established its intent to cease overnight tenors of LIBOR after December 31, 2021. In March 2021, the UK Financial Conduct Authority announced that the intended cessation date of the overnight tenors of LIBOR would be June 30, 2023 which is beyond the current sunset date of ASC 848. The amendments in this Update defer the sunset date of ASC 848 from December 31, 2022 to December 31, 2024, after which entities will no longer be permitted to apply the relief in ASC 848.December 31, 2024The Company has updated its credit agreements to include language regarding the successor or alternate rate to LIBOR, and a review of other contracts and agreements is on-going. The Company does not expect the guidance to have a material impact on its results of operations, financial position, cash flows or disclosures.
Note 3 - Seasonality of operations
Some of the Company's operations are highly seasonal and revenues from, and certain expenses for, such operations may fluctuate significantly among quarterly periods. Accordingly, the interim results for particular businesses, and for the Company as a whole, may not be indicative of results for the full fiscal year.
11

Index
Note 4 - Receivables and allowance for expected credit losses
Receivables consistsconsist primarily of trade and contracting services contract receivables from the sale of goods and services, which are recorded at the invoiced amount, and contract assets, net of expected credit losses. For more information on contract assets, see Note 9.8. The Company's trade receivables are all due in 12 months or less. The total balance of receivables past due 90 days or more was $53.5 million, $50.7 million $33.9 million and $44.8$45.6 million at March 31, 20222023 and 2021,2022, and December 31, 2021,2022, respectively.
The Company's expected credit losses are determined through a review using historical credit loss experience; changes in asset specific characteristics; current conditions; and reasonable and supportable future forecasts, among other specific account data, and is performed at least quarterly. The Company develops and documents its methodology to determine its allowance for expected credit losses at each of its reportable business segments. Risk characteristics used by the business segments may include customer mix, knowledge of customers and general economic conditions of the various local economies, among others. Specific account balances are written off when management determines the amounts to be uncollectible. Management has reviewed the balance reserved through the allowance for expected credit losses and believes it is reasonable.
12

Index
Details of the Company's expected credit losses were as follows:
ElectricNatural gas
distribution
PipelineConstruction
materials and
contracting
Construction
services
Total
 (In thousands)
At December 31, 2022$375 $1,615 $$5,477 $2,162 $9,631 
Current expected credit loss provision615 2,324 — 428 826 4,193 
Less write-offs charged against the allowance667 1,225 — 83 51 2,026 
Credit loss recoveries collected145 229 — — 375 
At March 31, 2023$468 $2,943 $$5,822 $2,938 $12,173 
ElectricNatural gas
distribution
PipelineConstruction
materials and
contracting
Construction
services
Total
 (In thousands)
At December 31, 2021$269 $1,506 $$5,406 $2,533 $9,716 
Current expected credit loss provision565 1,369 — (253)54 1,735 
Less write-offs charged against the allowance597 932 — 27 71 1,627 
Credit loss recoveries collected124 180 — — 28 332 
At March 31, 2022$361 $2,123 $$5,126 $2,544 $10,156 
ElectricNatural gas
distribution
PipelineConstruction
materials and
contracting
Construction
services
Total
 (In thousands)
At December 31, 2020$899 $2,571 $$6,164 $5,722 $15,358 
Current expected credit loss provision538 1,273 — (1,049)(1,079)(317)
Less write-offs charged against the allowance888 1,107 — 273 401 2,669 
Credit loss recoveries collected129 213 — — — 342 
At March 31, 2021$678 $2,950 $$4,842 $4,242 $12,714 
Note 5 - Inventories and natural gas in storage
Natural gas in storage for the Company's regulated operations is generally valued at lower of cost or market using the last-in, first-out method or lower of cost or net realizable value using the average cost or first-in, first-out method. The majority of all other inventories are valued at the lower of cost or net realizable value using the average cost method. Inventories include production costs incurred as part of the Company's aggregate mining activities. These inventoriable production costs include all mining and processing costs associated with the production of aggregates. Stripping costs incurred during the production phase, which represent costs of removing overburden and waste materials to access mineral deposits, are a component of inventoriable production costs. The portion of the cost of natural gas in storage expected to be used within 12 months was included in inventories. Inventories on the Consolidated Balance Sheets were as follows:
March 31, 2022March 31, 2021December 31, 2021 March 31, 2023March 31, 2022December 31, 2022
(In thousands) (In thousands)
Aggregates held for resaleAggregates held for resale$195,489 $180,450 $184,363 Aggregates held for resale$207,564 $195,489 $199,110 
Asphalt oilAsphalt oil93,816 59,853 57,002 Asphalt oil101,271 93,816 68,609 
Materials and suppliesMaterials and supplies35,967 26,481 30,629 Materials and supplies45,310 35,967 40,056 
Merchandise for resaleMerchandise for resale33,393 24,319 28,501 Merchandise for resale42,603 33,393 40,296 
Natural gas in storage (current)Natural gas in storage (current)10,801 8,113 18,867 Natural gas in storage (current)8,662 10,801 22,533 
OtherOther10,850 17,521 16,247 Other20,424 10,850 16,921 
TotalTotal$380,316 $316,737 $335,609 Total$425,834 $380,316 $387,525 
The remainder of natural gas in storage, which largely represents the cost of gas required to maintain pressure levels for normal operating purposes, was included in noncurrent assets - other and was $47.5$47.4 million at March 31, 20222023 and 2021,$47.5 million at both March 31, 2022 and December 31, 2021.2022.
1213

Index
Note 6 - Earnings per share
Basic earnings per share is computed by dividing net income by the weighted average number of shares of common stock outstanding during the applicable period. Diluted earnings per share is computed by dividing net income by the total of the weighted average number of shares of common stock outstanding during the applicable period, plus the effect of non-vested performance share awards and restricted stock units. Common stock outstanding includes issued shares less shares held in treasury. Net income was the same for both the basic and diluted earnings per share calculations. A reconciliation of the weighted average common shares outstanding used in the basic and diluted earnings per share calculations follows:
Three Months EndedThree Months Ended
March 31,March 31,
2022202120232022
(In thousands, except per share amounts)(In thousands, except per share amounts)
Weighted average common shares outstanding - basicWeighted average common shares outstanding - basic203,351 200,708 Weighted average common shares outstanding - basic203,624 203,351 
Effect of dilutive performance share awards and restricted stock unitsEffect of dilutive performance share awards and restricted stock units40 244 Effect of dilutive performance share awards and restricted stock units286 40 
Weighted average common shares outstanding - dilutedWeighted average common shares outstanding - diluted203,391 200,952 Weighted average common shares outstanding - diluted203,910 203,391 
Shares excluded from the calculation of diluted earnings per shareShares excluded from the calculation of diluted earnings per share— — Shares excluded from the calculation of diluted earnings per share— — 
Dividends declared per common shareDividends declared per common share$.2175 $.2125 Dividends declared per common share$.2225 $.2175 
Note 7 - Equity
The Company currently has a shelf registration statement on file with the SEC, under which the Company may issue and sell any combination of common stock and debt securities. The Company may sell such securities if warranted by market conditions and the Company's capital requirements.
In August 2020, the Company amended the Distribution Agreement dated February 22, 2019, with J.P. Morgan Securities LLC and MUFG Securities Americas Inc., as sales agents. This agreement, as amended, allows the offering, issuance and sale of up to 6.4 million shares of the Company's common stock in connection with an "at-the-market" offering. The common stock may be offered for sale, from time to time, in accordance with the terms and conditions of this agreement. As of March 31, 2022, the Company had capacity to issue up to 3.6 million additional shares of common stock under the "at-the-market" offering program.
Details of the Company's "at-the-market" offering activity was as follows:
Three Months Ended
March 31,
20222021
(In millions)
Shares issued— .7 
Net proceeds *$(.1)$19.7 **
*    Net proceeds include issuance costs of $127,000 and $300,000 for the three months ended March 31, 2022 and 2021, respectively
**    Net proceeds were used for capital expenditures.
Note 87 - Accumulated other comprehensive loss
The after-tax changes in the components of accumulated other comprehensive loss were as follows:
Net Unrealized
Gain (Loss) on
Derivative
 Instruments
 Qualifying as
Hedges
Postretirement
 Liability
Adjustment
Net Unrealized
Gain (Loss) on
Available-for-sale
Investments
Total
Accumulated
 Other
Comprehensive
 Loss
 (In thousands)
At December 31, 2021$(538)$(40,461)$(5)$(41,004)
Other comprehensive loss before reclassifications— — (320)(320)
Amounts reclassified from accumulated other comprehensive loss112 445 32 589 
Net current-period other comprehensive income (loss)112 445 (288)269 
At March 31, 2022$(426)$(40,016)$(293)$(40,735)
Net Unrealized
Gain (Loss) on
Derivative
 Instruments
 Qualifying as
Hedges
Postretirement
 Liability
Adjustment
Net Unrealized
Gain (Loss) on
Available-for-sale
Investments
Total
Accumulated
 Other
Comprehensive
 Loss
 (In thousands)
At December 31, 2022$(125)$(29,900)$(558)$(30,583)
Other comprehensive income before reclassifications— — 70 70 
Amounts reclassified from accumulated other comprehensive loss34 100 13 147 
Net current-period other comprehensive income34 100 83 217 
At March 31, 2023$(91)$(29,800)$(475)$(30,366)
Net Unrealized
Gain (Loss) on
Derivative
 Instruments
 Qualifying as
Hedges
Postretirement
 Liability
Adjustment
Net Unrealized
Gain (Loss) on
Available-for-sale
Investments
Total
Accumulated
 Other
Comprehensive
 Loss
 (In thousands)
At December 31, 2021$(538)$(40,461)$(5)$(41,004)
Other comprehensive loss before reclassifications— — (320)(320)
Amounts reclassified from accumulated other comprehensive loss112 445 32 589 
Net current-period other comprehensive income (loss)112 445 (288)269 
At March 31, 2022$(426)$(40,016)$(293)$(40,735)
1314

Index
Net Unrealized
Gain (Loss) on
Derivative
 Instruments
 Qualifying as
Hedges
Postretirement
 Liability
Adjustment
Net Unrealized
Gain (Loss) on
Available-for-sale
Investments
Total
Accumulated
 Other
Comprehensive
 Loss
 (In thousands)
At December 31, 2020$(984)$(47,207)$113 $(48,078)
Other comprehensive loss before reclassifications— — (44)(44)
Amounts reclassified from accumulated other comprehensive loss111 466 35 612 
Net current-period other comprehensive income (loss)111 466 (9)568 
At March 31, 2021$(873)$(46,741)$104 $(47,510)
The following amounts were reclassified out of accumulated other comprehensive loss into net income. The amounts presented in parenthesis indicate a decrease to net income on the Consolidated Statements of Income. The reclassifications were as follows:
Three Months EndedLocation on Consolidated
Statements of
Income
March 31,
20222021
(In thousands)
Reclassification adjustment for loss on derivative instruments included in net income$(148)$(148)Interest expense
36 37 Income taxes
(112)(111)
Amortization of postretirement liability losses included in net periodic benefit credit(609)(617)Other income
164 151 Income taxes
(445)(466)
Reclassification adjustment on available-for-sale investments included in net income(40)(44)Other income
Income taxes
(32)(35)
Total reclassifications$(589)$(612)
14
Three Months EndedLocation on Consolidated
Statements of
Income
March 31,
20232022
(In thousands)
Reclassification adjustment for loss on derivative instruments included in net income$(45)$(148)Interest expense
11 36 Income taxes
(34)(112)
Amortization of postretirement liability losses included in net periodic benefit credit(134)(609)Other income
34 164 Income taxes
(100)(445)
Reclassification adjustment on available-for-sale investments included in net income(16)(40)Other income
Income taxes
(13)(32)
Total reclassifications$(147)$(589)

Index
Note 98 - Revenue from contracts with customers
Revenue is recognized when a performance obligation is satisfied by transferring control over a product or service to a customer. Revenue is measured based on consideration specified in a contract with a customer and excludes any sales incentives and amounts collected on behalf of third parties. The Company is considered an agent for certain taxes collected from customers. As such, the Company presents revenues net of these taxes at the time of sale to be remitted to governmental authorities, including sales and use taxes.
Disaggregation
In the following tables, revenue is disaggregated by the type of customer or service provided. The Company believes this level of disaggregation best depicts how the nature, amount, timing and uncertainty of revenue and cash flows are affected by economic factors. The table also includes a reconciliation of the disaggregated revenue by reportable segments. For more information on the Company's business segments, see Note 17.
Three Months Ended March 31, 2022ElectricNatural gas
distribution
PipelineConstruction
materials and
contracting
Construction
services
OtherTotal
Three Months Ended March 31, 2023Three Months Ended March 31, 2023ElectricNatural gas
distribution
PipelineConstruction
materials and
contracting
Construction
services
OtherTotal
(In thousands)(In thousands)
Residential utility salesResidential utility sales$37,304 $258,816 $— $— $— $— $296,120 Residential utility sales$37,825 $327,651 $— $— $— $— $365,476 
Commercial utility salesCommercial utility sales35,600 163,609 — — — — 199,209 Commercial utility sales36,347 204,927 — — — — 241,274 
Industrial utility salesIndustrial utility sales10,306 13,024 — — — — 23,330 Industrial utility sales10,763 16,838 — — — — 27,601 
Other utility salesOther utility sales1,750 — — — — — 1,750 Other utility sales1,774 — — — — — 1,774 
Natural gas transportationNatural gas transportation— 12,381 31,574 — — — 43,955 Natural gas transportation— 13,504 34,983 — — — 48,487 
Natural gas storageNatural gas storage— — 3,719 — — — 3,719 Natural gas storage— — 3,861 — — — 3,861 
Contracting servicesContracting services— — — 114,267 — — 114,267 Contracting services— — — 114,983 — — 114,983 
Construction materialsConstruction materials— — — 241,732 — — 241,732 Construction materials— — — 232,502 — — 232,502 
Intrasegment eliminationsIntrasegment eliminations— — — (46,033)— — (46,033)Intrasegment eliminations— — — (39,585)— — (39,585)
Electrical & mechanical specialty contractingElectrical & mechanical specialty contracting— — — — 392,808 — 392,808 Electrical & mechanical specialty contracting— — — — 590,263 — 590,263 
Transmission & distribution specialty contractingTransmission & distribution specialty contracting— — — — 148,466 — 148,466 Transmission & distribution specialty contracting— — — — 152,022 — 152,022 
OtherOther12,753 2,609 1,709 — 48 4,341 21,460 Other11,878 4,721 1,859 — 33 4,739 23,230 
Intersegment eliminationsIntersegment eliminations(124)(136)(25,940)(130)(1,059)(4,341)(31,730)Intersegment eliminations(122)(150)(26,410)(132)(214)(4,739)(31,767)
Revenues from contracts with customersRevenues from contracts with customers97,589 450,303 11,062 309,836 540,263 — 1,409,053 Revenues from contracts with customers98,465 567,491 14,293 307,768 742,104 — 1,730,121 
Revenues out of scopeRevenues out of scope(3,995)115 58 — 11,328 — 7,506 Revenues out of scope(2,863)(1,974)38 — 12,015 — 7,216 
Total external operating revenuesTotal external operating revenues$93,594 $450,418 $11,120 $309,836 $551,591 $— $1,416,559 Total external operating revenues$95,602 $565,517 $14,331 $307,768 $754,119 $— $1,737,337 
Three Months Ended March 31, 2021ElectricNatural gas
distribution
PipelineConstruction
materials and
contracting
Construction
services
OtherTotal
(In thousands)
Residential utility sales$33,436 $203,137 $— $— $— $— $236,573 
Commercial utility sales32,928 120,052 — — — — 152,980 
Industrial utility sales10,029 8,812 — — — — 18,841 
Other utility sales1,566 — — — — — 1,566 
Natural gas transportation— 12,452 29,417 — — — 41,869 
Natural gas storage— — 4,029 — — — 4,029 
Contracting services— — — 96,025 — — 96,025 
Construction materials— — — 216,412 — — 216,412 
Intrasegment eliminations— — — (46,716)— — (46,716)
Electrical & mechanical specialty contracting— — — — 355,190 — 355,190 
Transmission & distribution specialty contracting— — — — 151,363 — 151,363 
Other9,773 3,009 2,660 — 36 3,341 18,819 
Intersegment eliminations(136)(142)(26,229)(62)(1,042)(3,324)(30,935)
Revenues from contracts with customers87,596 347,320 9,877 265,659 505,547 17 1,216,016 
Revenues out of scope(2,923)2,886 36 — 11,923 — 11,922 
Total external operating revenues$84,673 $350,206 $9,913 $265,659 $517,470 $17 $1,227,938 
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Three Months Ended March 31, 2022ElectricNatural gas
distribution
PipelineConstruction
materials and
contracting
Construction
services
OtherTotal
(In thousands)
Residential utility sales$37,304 $258,816 $— $— $— $— $296,120 
Commercial utility sales35,600 163,609 — — — — 199,209 
Industrial utility sales10,306 13,024 — — — — 23,330 
Other utility sales1,750 — — — — — 1,750 
Natural gas transportation— 12,381 31,574 — — — 43,955 
Natural gas storage— — 3,719 — — — 3,719 
Contracting services— — — 114,267 — — 114,267 
Construction materials— — — 241,732 — — 241,732 
Intrasegment eliminations— — — (46,033)— — (46,033)
Electrical & mechanical specialty contracting— — — — 392,808 — 392,808 
Transmission & distribution specialty contracting— — — — 148,466 — 148,466 
Other12,753 2,609 1,709 — 48 4,341 21,460 
Intersegment eliminations(124)(136)(25,940)(130)(1,059)(4,341)(31,730)
Revenues from contracts with customers97,589 450,303 11,062 309,836 540,263 — 1,409,053 
Revenues out of scope(3,995)115 58 — 11,328 — 7,506 
Total external operating revenues$93,594 $450,418 $11,120 $309,836 $551,591 $— $1,416,559 
Presented in the previous tables are intrasegment revenuessales of materials to both third parties and internal customers within the construction materials and contracting segment to highlight the focus on vertical integration as this segment sells materials to both third parties and internal customers. Due to consolidation requirements, thesethe internal sales revenues must be eliminated against the construction materials product used in the contracting services to arrive at the external operating revenue total for the segment.
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Contract balances
The timing of revenue recognition may differ from the timing of invoicing to customers. The timing of invoicing to customers does not necessarily correlate with the timing of revenues being recognized under the cost-to-cost method of accounting. Contracts from contracting servicesconstruction work are billed as work progresses in accordance with agreed upon contractual terms. Generally, billing to the customer occurs contemporaneous to revenue recognition. A variance in timing of the billings may result in a contract asset or a contract liability. A contract asset occurs when revenues are recognized under the cost-to-cost measure of progress, which exceeds amounts billed on uncompleted contracts. Such amounts will be billed as standard contract terms allow, usually based on various measures of performance or achievement. A contract liability occurs when there are billings in excess of revenues recognized under the cost-to-cost measure of progress on uncompleted contracts. Contract liabilities decrease as revenue is recognized from the satisfaction of the related performance obligation.
The changes in contract assets and liabilities were as follows:
March 31, 2022December 31, 2021ChangeLocation on Consolidated Balance SheetsMarch 31, 2023December 31, 2022ChangeLocation on Consolidated Balance Sheets
(In thousands)(In thousands)
Contract assetsContract assets$164,622 $125,742 $38,880 Receivables, netContract assets$212,687 $185,289 $27,398 Receivables, net
Contract liabilities - currentContract liabilities - current(154,136)(179,140)25,004 Accounts payableContract liabilities - current(202,788)(208,204)5,416 Accounts payable
Contract liabilities - noncurrentContract liabilities - noncurrent(40)(118)78 Noncurrent liabilities - otherContract liabilities - noncurrent(442)(6)(436)Noncurrent liabilities - other
Net contract assets (liabilities)Net contract assets (liabilities)$10,446 $(53,516)$63,962 Net contract assets (liabilities)$9,457 $(22,921)$32,378 
The Company recognized $154.9 million in revenue for the three months ended March 31, 2023, which was previously included in contract liabilities at December 31, 2022. The Company recognized $121.8 million in revenue for the three months ended March 31, 2022, which was previously included in contract liabilities at December 31, 2021. The Company recognized $123.4 million in revenue for the three months ended March 31, 2021, which was previously included in contract liabilities at December 31, 2020.
The Company recognized a net increase in revenues of $23.5$21.3 million and $34.3$23.5 million for the three months ended March 31, 20222023 and 2021,2022, respectively, from performance obligations satisfied in prior periods.
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Remaining performance obligations
The remaining performance obligations, also referred to as backlog, at the construction materials and contracting and construction services segments include unrecognized revenues that the Company reasonably expects to be realized. These unrecognized revenues can include: projects that have a written award, a letter of intent, a notice to proceed, an agreed upon work order to perform work on mutually accepted terms and conditions and change orders or claims to the extent management believes additional contract revenues will be earned and are deemed probable of collection. Excluded from remaining performance obligations are potential orders under master service agreements. The majority of the Company's constructioncontracting services contracts have an original duration of less than two years.
The remaining performance obligations at the pipeline segment include firm transportation contracts with fixed pricing and fixed volumes. The Company has applied the practical expedient, which does not require additional disclosures for contracts with an original duration of less than 12 months, to certain firm transportation and non-regulated contracts. The Company's firm transportation contracts included in the remaining performance obligations have weighted average remaining durations of approximatelyless than five years.
At March 31, 2022,2023, the Company's remaining performance obligations were $3.1$3.7 billion. The Company expects to recognize the following revenue amounts in future periods related to these remaining performance obligations: $2.4$2.6 billion within the next 12 months or less; $311.1$454.5 million within the next 13 to 24 months; and $407.2$592.8 million in 25 months or more.
Note 109 - Business combinations
The following acquisitions wereacquisition was accounted for as a business combinationscombination in accordance with ASC 805 - Business Combinations. The results of the acquired businessesbusiness combination have been included in the Consolidated Financial Statements beginning on the acquisition date. Pro forma financial amounts reflecting the effects of the business combinationscombination are not presented as none of these business combinations, individually or in the aggregate, werebecause it was not material to the Company's financial position or results of operations.
The acquisitionsAcquisitions are also subject to customary adjustments based on, among other things, the amount of cash, debt and working capital in the business as of the closing date. The amounts included in the Consolidated Balance Sheets for these adjustments are considered provisional until final settlement has occurred.
The Company had no acquisitions duringin the first quarter of 2022.
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three months ended March 31, 2023. In 2021,December 2022, the construction materials and contracting segment's acquisitions included:
Baker Rock Resourcessegment acquired Allied Concrete and Oregon Mainline Paving, two premier construction materials companies located around the Portland, Oregon metro area, acquiredSupply Co., a producer of ready-mixed concrete in November 2021.California. At March 31, 2022,2023, the purchase price allocation was considered preliminary and will be finalized within 12 months of the acquisition date.
Mt. Hood Rock, a construction aggregates business in Oregon, acquired in April 2021. As of March 31, 2022, the purchase price allocation was settled with no material adjustments to the provisional accounting.
In 2021, theThe total purchase price for acquisitions that occurred in 2022 was $236.1$8.9 million, subject to certain adjustments, with cash acquired totaling $900,000.$2.8 million. The purchase price includes consideration paid of $235.2$1.5 million, a $70,000 holdback liability, and 273,153 shares of common stock with a market value of $8.4 million as of the respective acquisition date. Due to the holding period restriction on the common stock, the share consideration was discounted to a fair value of approximately $7.3 million. The amounts allocated to the aggregated assets acquired and liabilities assumed during 20212022 were as follows: $17.0$1.7 million to current assets; $179.8$5.9 million to property, plant and equipment; $50.6 million$200,000 to goodwill; $2.2 million to other intangible assets; $8.7 million$100,000 to current liabilities; $2.5 million$500,000 to noncurrent liabilities - other;other and $3.2$1.2 million to deferred tax liabilities. During the first quarter of 2022, measurement period adjustments were made to previously reported provisional amounts, which decreased goodwill and increased property, plant and equipment by $2.1 million. The Company issued debt to finance the acquisitions.
Costs incurred for acquisitions are included in operation and maintenance expense on the Consolidated Statements of Income and were not materialimmaterial for both the three months ended March 31, 20222023 and 2021.2022.
Note 1110 - Leases
The Company's leases primarily include operating leases for equipment, buildings, easements and vehicles. The Company leases certain equipment to third parties through its utility and construction services segments, which are considered short-term operating leases with terms of less than 12 months.
The Company recognized revenue from operating leases of $11.4$12.2 million and $12.0$11.4 million for the three months ended March 31, 20222023 and 2021,2022, respectively. At March 31, 2022,2023, the Company had $8.4$9.1 million of lease receivables with a majority due within 12 months.
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Note 1211 - Goodwill and other intangible assets
The changes in the carrying amount of goodwill were as follows:
Balance at January 1, 2022Goodwill
Acquired
During
 the Year
Measurement
Period
Adjustments
Balance at March 31, 2022Balance at January 1, 2023Goodwill
Acquired
During
 the Year
Measurement
Period
Adjustments
Balance at March 31, 2023
(In thousands) (In thousands)
Natural gas distributionNatural gas distribution$345,736 $— $— $345,736 Natural gas distribution$345,736 $— $— $345,736 
Construction materials and contractingConstruction materials and contracting276,426 — (2,124)274,302 Construction materials and contracting274,540 — — 274,540 
Construction servicesConstruction services143,224 — — 143,224 Construction services143,224 — — 143,224 
TotalTotal$765,386 $— $(2,124)$763,262 Total$763,500 $— $— $763,500 
Balance at January 1, 2021Goodwill
Acquired
During
the Year
Measurement
Period
Adjustments
Balance at March 31, 2021Balance at January 1, 2022Goodwill
Acquired
During
the Year
Measurement
Period
Adjustments
Balance at March 31, 2022
(In thousands) (In thousands)
Natural gas distributionNatural gas distribution$345,736 $— $— $345,736 Natural gas distribution$345,736 $— $— $345,736 
Construction materials and contractingConstruction materials and contracting226,003 — — 226,003 Construction materials and contracting276,426 — (2,124)274,302 
Construction servicesConstruction services143,224 — — 143,224 Construction services143,224 — — 143,224 
TotalTotal$714,963 $— $— $714,963 Total$765,386 $— $(2,124)$763,262 
Balance at January 1, 2021Goodwill
Acquired
During
the Year
Measurement
Period
Adjustments
Balance at December 31, 2021
 (In thousands)
Natural gas distribution$345,736 $— $— $345,736 
Construction materials and contracting226,003 50,640 (217)276,426 
Construction services143,224 — — 143,224 
Total$714,963 $50,640 $(217)$765,386 
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Balance at January 1, 2022Goodwill
Acquired
During
the Year
Measurement
Period
Adjustments
Balance at December 31, 2022
 (In thousands)
Natural gas distribution$345,736 $— $— $345,736 
Construction materials and contracting276,426 238 (2,124)274,540 
Construction services143,224 — — 143,224 
Total$765,386 $238 $(2,124)$763,500 
Other amortizable intangible assets were as follows:
March 31, 2022March 31, 2021December 31, 2021 March 31, 2023March 31, 2022December 31, 2022
(In thousands) (In thousands)
Customer relationshipsCustomer relationships$28,990 $28,836 $29,740 Customer relationships$28,990 $28,990 $28,990 
Less accumulated amortizationLess accumulated amortization10,846 7,792 10,650 Less accumulated amortization14,680 10,846 13,724 
18,144 21,044 19,090  14,310 18,144 15,266 
Noncompete agreementsNoncompete agreements4,591 3,941 4,591 Noncompete agreements4,331 4,591 4,591 
Less accumulated amortizationLess accumulated amortization3,016 2,441 2,856 Less accumulated amortization3,405 3,016 3,529 
1,575 1,500 1,735 926 1,575 1,062 
OtherOther6,969 11,957 12,601 Other2,479 6,969 5,280 
Less accumulated amortizationLess accumulated amortization5,299 10,540 10,848 Less accumulated amortization1,381 5,299 4,076 
1,670 1,417 1,753  1,098 1,670 1,204 
TotalTotal$21,389 $23,961 $22,578 Total$16,334 $21,389 $17,532 
The previous tables include goodwill and intangible assets associated with the business combinations completed during 2021.2022. For more information related to these business combinations, see Note 10.9.
Amortization expense for amortizable intangible assets for both the three months ended March 31, 20222023 and 2021,2022, was $1.2 million and $1.5 million, respectively.million. Estimated amortization expense for identifiable intangible assets as of March 31, 2022,2023, was:
Remainder of 20222023202420252026Thereafter
(In thousands)
Amortization expense$3,630 $4,470 $4,200 $2,206 $1,716 $5,167 
Remainder of 20232024202520262027Thereafter
(In thousands)
Amortization expense$3,393 $4,249 $2,200 $1,782 $1,759 $2,951 
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Note 1312 - Regulatory assets and liabilities
The following table summarizes the individual components of unamortized regulatory assets and liabilities:
Estimated
Recovery or Refund
Period as of
March 31, 2022
*March 31, 2022March 31, 2021December 31, 2021
Estimated
Recovery or Refund
Period as of
March 31, 2023
*March 31, 2023March 31, 2022December 31, 2022
(In thousands)(In thousands)
Regulatory assets:Regulatory assets:Regulatory assets:
Current:Current:Current:
Natural gas costs recoverable through rate adjustmentsNatural gas costs recoverable through rate adjustmentsUp to 1 year$66,132 $76,782 $86,371 Natural gas costs recoverable through rate adjustmentsUp to 1 year$198,166 $66,132 $141,306 
DecouplingUp to 1 year7,609 4,180 9,131 
Conservation programsConservation programsUp to 1 year7,567 6,679 8,225 Conservation programsUp to 1 year8,599 7,567 8,544 
Cost recovery mechanismsCost recovery mechanismsUp to 1 year3,432 7,130 4,536 Cost recovery mechanismsUp to 1 year3,954 3,432 4,019 
OtherOtherUp to 1 year4,338 3,681 10,428 OtherUp to 1 year5,599 11,947 11,223 
89,078 98,452 118,691 216,318 89,078 165,092 
Noncurrent:Noncurrent:Noncurrent:
Pension and postretirement benefitsPension and postretirement benefits**142,681 155,924 142,681 Pension and postretirement benefits**143,349 142,681 143,349 
Cost recovery mechanismsCost recovery mechanismsUp to 10 years67,989 15,508 44,870 Cost recovery mechanismsUp to 10 years65,732 67,989 67,171 
Plant costs/asset retirement obligationsPlant costs/asset retirement obligationsOver plant lives63,325 72,250 63,116 Plant costs/asset retirement obligationsOver plant lives44,131 63,325 44,462 
Manufactured gas plant site remediationManufactured gas plant site remediation-26,605 26,089 26,624 
Environmental compliance programsEnvironmental compliance programs-21,942 — — 
Plant to be retiredPlant to be retired-29,452 73,498 50,070 Plant to be retired-21,072 29,452 21,525 
Manufactured gas plant site remediation-26,089 26,002 26,053 
Taxes recoverable from customersTaxes recoverable from customersOver plant lives12,492 10,800 12,339 Taxes recoverable from customersOver plant lives12,198 12,492 12,330 
Long-term debt refinancing costsLong-term debt refinancing costsUp to 38 years3,636 4,268 3,794 Long-term debt refinancing costsUp to 37 years3,041 3,636 3,188 
Natural gas costs recoverable through rate adjustmentsUp to 2 years3,246 15,158 5,186 
OtherOtherUp to 17 years10,318 6,509 9,742 OtherUp to 16 years11,430 13,564 11,010 
359,228 379,917 357,851 349,500 359,228 329,659 
Total regulatory assetsTotal regulatory assets$448,306 $478,369 $476,542 Total regulatory assets$565,818 $448,306 $494,751 
Regulatory liabilities:Regulatory liabilities:Regulatory liabilities:
Current:Current:Current:
Electric fuel and purchased power deferralElectric fuel and purchased power deferralUp to 1 year9,630 — 4,929 
Natural gas costs refundable through rate adjustmentsNatural gas costs refundable through rate adjustmentsUp to 1 year$13,107 $16,344 $6,700 Natural gas costs refundable through rate adjustmentsUp to 1 year6,331 13,107 955 
Conservation programsConservation programsUp to 1 year3,834 144 4,126 
Cost recovery mechanismsCost recovery mechanismsUp to 1 year2,926 2,550 1,977 
Taxes refundable to customersTaxes refundable to customersUp to 1 year3,470 3,092 3,841 Taxes refundable to customersUp to 1 year1,513 3,470 3,937 
Electric fuel and purchased power deferralUp to 1 year— 2,001 — 
Refundable fuel and electric costsRefundable fuel and electric costsUp to 1 year1,179 316 3,253 
OtherOtherUp to 1 year14,609 12,829 5,762 OtherUp to 1 year18,982 11,599 7,263 
31,186 34,266 16,303 44,395 31,186 26,440 
Noncurrent:Noncurrent:Noncurrent:
Plant removal and decommissioning costsPlant removal and decommissioning costsOver plant lives214,467 171,485 208,650 
Taxes refundable to customersTaxes refundable to customersOver plant lives212,472 224,795 215,421 Taxes refundable to customersOver plant lives200,879 212,472 203,222 
Plant removal and decommissioning costsOver plant lives171,485 169,430 168,152 
Cost recovery mechanismsCost recovery mechanismsUp to 19 years16,313 9,508 14,025 
Accumulated deferred investment tax creditAccumulated deferred investment tax creditUp to 19 years13,996 13,352 13,594 
Pension and postretirement benefitsPension and postretirement benefits**20,434 16,965 20,434 Pension and postretirement benefits**7,376 20,434 7,376 
Accumulated deferred investment tax creditUp to 20 years13,352 11,428 12,696 
OtherOtherUp to 20 years15,885 6,442 12,087 OtherUp to 15 years1,638 6,377 1,587 
433,628 429,060 428,790 454,669 433,628 448,454 
Total regulatory liabilitiesTotal regulatory liabilities$464,814 $463,326 $445,093 Total regulatory liabilities$499,064 $464,814 $474,894 
Net regulatory positionNet regulatory position$(16,508)$15,043 $31,449 Net regulatory position$66,754 $(16,508)$19,857 
*Estimated recovery or refund period for amounts currently being recovered or refunded in rates to customers.
**    Recovered as expense is incurred or cash contributions are made.
RegulatoryAt March 31, 2023 and 2022, and December 31, 2022, approximately $255.6 million, $268.1 million and $242.5 million, respectively, of regulatory assets were not earning a rate of return were approximately $268.1 million and $361.4 million at March 31, 2022 and 2021, respectively, and $296.6 million at December 31, 2021;return; however, these regulatory assets are expected to be recovered from customers in future rates. These assets are largely comprised of the unfunded portion of pension and postretirement benefits, asset retirement obligations, accelerated depreciation on plant retirement, and the estimated future cost of manufactured gas plant site remediation.remediation and the costs associated with environmental compliance.
In February 2021, a prolonged period of unseasonably cold temperaturesThe Company is subject to environmental compliance regulations in the central United States significantly increased the demand for electric andcertain states which require natural gas servicesdistribution companies to reduce overall GHG emissions to certain thresholds as established by each applicable state. Compliance with these standards may be achieved through increased energy efficiency and contributed to increased market prices. Overall, Montana-Dakotaconservation measures, purchased emission allowances and Great Plains incurred approximately $44.0 million in increased natural gas costs in order to maintain services for its customers. These extraordinary gas costs were recorded as regulatory assets as they are expected to be recovered from customers. Montana-Dakota and Great Plains have received approval for the recovery of purchased gas adjustments related to the cold-weather event in alloffsets,
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purchases of community climate investment credits and purchases of low carbon fuels. Emission allowances are allocated by the respective states to the Company at no cost, of which a portion is required to be sold at auction. The Company expects the compliance costs for these regulations and the revenues from the sale of the allocated emissions allowances will be passed through to customers in rates and has, accordingly, deferred the environmental compliance obligation as a regulatory asset.
In the last half of 2021 through 2022, the Company experienced high natural gas costs due to increase in demand outpacing the supply along with the impact of global events. Additionally, in December 2022 and January 2023, natural gas prices significantly increased across the Pacific Northwest from multiple price-pressuring events including wide-spread below-normal temperatures and higher natural gas consumption; reduced natural gas flows due to pipeline constraints, including maintenance in West Texas; and historically low regional natural gas storage levels. This increase in natural gas costs experienced in certain jurisdictions impacted, including out-of-cycle purchasedwas partially offset by the recovery of prior period natural gas adjustment requests in most jurisdictions. costs being recovered over a period longer than the normal one-year period.
For a discussion of the Company's most recent cases by jurisdiction, see Note 19.
In 2019, the Company experienced increased natural gas costs in Washington from the rupture of the Enbridge pipeline in Canada in late 2018. As a result, the Company requested, and the WUTC approved, recovery through 2022 of the balance of natural gas costs recoverable related to this period of time, which was over three years rather than its normal one-year recovery period.
In February 2019, the Company announced the retirement of three aging coal-fired electric generating units. The Company accelerated the depreciation related to these facilities in property, plant and equipment and recorded the difference between the accelerated depreciation, in accordance with GAAP, and the depreciation approved for rate-making purposes as regulatory assets. Requests were filed with the NDPSC and SDPUC, and subsequently approved, to offset the savings associated with the cessation of operations of these units with the amortization of the deferred regulatory assets. The Company ceased operations of Lewis & Clark Station in March 2021 and Units 1 and 2 at Heskett Station in February 2022. The Company subsequently movedreclassified the costs being recovered for these facilities from plant retirement to cost recovery mechanisms in the previous table and began amortizing the associated plant retirement and closure costs in the jurisdictions where requests were filed, as previously discussed.filed. The Company expects to recover the regulatory assets related to the plant retirements in future rates.
If, for any reason, the Company's regulated businesses cease to meet the criteria for application of regulatory accounting for all or part of their operations, the regulatory assets and liabilities relating to those portions ceasing to meet such criteria would be removed from the balance sheetwritten off and included in the statement of income or accumulated other comprehensive loss in the period in which the discontinuance of regulatory accounting occurs.
Note 13 - Environmental allowances and obligations
The Company's natural gas distribution segment acquires environmental allowances as part of its requirement to comply with environmental regulations in certain states. Allowances are allocated by the respective states to the Company at no cost and additional allowances are required to be purchased as needed based on the requirements in the respective states. The segment records purchased and allocated environmental allowances at weighted average cost under the inventory method of accounting. Environmental allowances are included in noncurrent assets - other on the Consolidated Balance Sheets.
Environmental compliance obligations, which are based on GHG emissions, are measured at the carrying value of environmental allowances held plus the estimated value of additional allowances necessary to satisfy the compliance obligation. Environmental compliance obligations are included in noncurrent liabilities - other on the Consolidated Balance Sheets. At March 31, 2023, the Company accrued $21.9 million in compliance obligations.
As environmental allowances are surrendered, the segment reduces the associated environmental compliance assets and liabilities from the Consolidated Balance Sheets. The expenses associated with the Company’s environmental allowances and obligations are deferred as regulatory assets. For more information on the Company’s regulatory assets and liabilities, see Note 12.
Note 14 - Fair value measurements
Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability (an exit price) in an orderly transaction between market participants at the measurement date. The fair value ASC establishes a hierarchy for grouping assets and liabilities, based on the significance of inputs. The estimated fair values of the Company's assets and liabilities measured on a recurring basis are determined using the market approach.
The Company measures its investments in certain fixed-income and equity securities at fair value with changes in fair value recognized in income. The Company anticipates using these investments, which consist of insurance contracts, to satisfy its obligations under its unfunded, nonqualified defined benefit and defined contribution plans for executive officers and certain key management employees, and invests in these fixed-income and equity securities for the purpose of earning investment returns and capital appreciation. These investments, which totaled $105.9 million, $105.4 million $101.6 million and $109.6$98.0 million, at March 31, 20222023 and 2021,2022, and December 31, 2021,2022, respectively, are classified as investments on the Consolidated Balance Sheets. The net unrealized gain on these investments was $3.8 million for the three months ended March 31, 2023. The net unrealized loss on these investments was $5.8 million for the three months ended March 31, 2022. The net unrealized gain on these investments was $127,000 for the three months ended March 31, 2021. The change in fair value, which is considered part of the cost of the plan, is classified in other income on the Consolidated Statements of Income.
The Company did not elect the fair value option, which records gains and losses in income, for its available-for-sale securities, which include mortgage-backed securities and U.S. Treasury securities. These available-for-sale securities are recorded at fair value
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and are classified as investments on the Consolidated Balance Sheets. Unrealized gains or losses are recorded in accumulated other comprehensive loss. Details of available-for-sale securities were as follows:
March 31, 2023CostGross
Unrealized
Gains
Gross
Unrealized
Losses
Fair Value
(In thousands)
Mortgage-backed securities$8,557 $$561 $7,999 
U.S. Treasury securities3,023 51 2,980 
Total$11,580 $11 $612 $10,979 
March 31, 2022CostGross
Unrealized
Gains
Gross
Unrealized
Losses
Fair Value
(In thousands)
Mortgage-backed securities$8,778 $$310 $8,471 
U.S. Treasury securities2,688 — 63 2,625 
Total$11,466 $$373 $11,096 
March 31, 2021CostGross
Unrealized
Gains
Gross
Unrealized
Losses
Fair Value
(In thousands)
Mortgage-backed securities$8,709 $155 $10 $8,854 
U.S. Treasury securities2,636 — 14 2,622 
Total$11,345 $155 $24 $11,476 
20

Index
December 31, 2021CostGross
Unrealized
Gains
Gross
Unrealized
Losses
Fair Value
December 31, 2022December 31, 2022CostGross
Unrealized
Gains
Gross
Unrealized
Losses
Fair Value
(In thousands)(In thousands)
Mortgage-backed securitiesMortgage-backed securities$8,702 $51 $47 $8,706 Mortgage-backed securities$8,928 $$636 $8,294 
U.S. Treasury securitiesU.S. Treasury securities2,407 — 11 2,396 U.S. Treasury securities2,608 — 72 2,536 
TotalTotal$11,109 $51 $58 $11,102 Total$11,536 $$708 $10,830 
The Company's assets measured at fair value on a recurring basis were as follows:
Fair Value Measurements at March 31, 2022, Using  Fair Value Measurements at March 31, 2023, Using 
Quoted Prices in
Active Markets
for Identical
Assets
(Level 1)
Significant
Other
Observable
Inputs
(Level 2)
Significant
Unobservable
Inputs
(Level 3)
Balance at March 31, 2022 Quoted Prices in
Active Markets
for Identical
Assets
(Level 1)
Significant
Other
Observable
Inputs
(Level 2)
Significant
Unobservable
Inputs
(Level 3)
Balance at March 31, 2023
(In thousands)(In thousands)
Assets:Assets: Assets: 
Money market fundsMoney market funds$— $13,131 $— $13,131 Money market funds$— $7,919 $— $7,919 
Insurance contracts*Insurance contracts*— 105,371 — 105,371 Insurance contracts*— 105,857 — 105,857 
Available-for-sale securities:Available-for-sale securities:Available-for-sale securities:
Mortgage-backed securitiesMortgage-backed securities— 8,471 — 8,471 Mortgage-backed securities— 7,999 — 7,999 
U.S. Treasury securitiesU.S. Treasury securities— 2,625 — 2,625 U.S. Treasury securities— 2,980 — 2,980 
Total assets measured at fair valueTotal assets measured at fair value$— $129,598 $— $129,598 Total assets measured at fair value$— $124,755 $— $124,755 
*    The insurance contracts invest approximately 61 percent in fixed-income investments, 15 percent in common stock of large-cap companies, 8 percent in common stock of mid-cap companies, 7 percent in target date investments, 6 percent in common stock of small-cap companies, 2 percent in cash equivalents and 1 percent in international investments.
21

Index
 Fair Value Measurements at March 31, 2022, Using 
 Quoted Prices in
Active Markets
for Identical
Assets
(Level 1)
Significant
Other
Observable
Inputs
(Level 2)
Significant
Unobservable
Inputs
(Level 3)
Balance at March 31, 2022
(In thousands)
Assets:    
Money market funds$— $13,131 $— $13,131 
Insurance contracts*— 105,371 — 105,371 
Available-for-sale securities:
Mortgage-backed securities— 8,471 — 8,471 
U.S. Treasury securities— 2,625 — 2,625 
Total assets measured at fair value$— $129,598 $— $129,598 
*    The insurance contracts invest approximately 61 percent in fixed-income investments, 17 percent in common stock of large-cap companies, 8 percent in common stock of mid-cap companies, 6 percent in common stock of small-cap companies, 6 percent in target date investments and 2 percent in cash equivalents.
Fair Value Measurements at March 31, 2021, Using  Fair Value Measurements at December 31, 2022, Using 
Quoted Prices in
Active Markets
for Identical
Assets
(Level 1)
Significant
Other
Observable
Inputs
(Level 2)
Significant
Unobservable
Inputs
(Level 3)
Balance at March 31, 2021Quoted Prices in
Active Markets
for Identical
Assets
 (Level 1)
Significant
Other
Observable
Inputs
(Level 2)
Significant
Unobservable
Inputs
 (Level 3)
Balance at December 31, 2022
(In thousands)(In thousands)
Assets:Assets: Assets: 
Money market fundsMoney market funds$— $9,388 $— $9,388 Money market funds$— $7,361 $— $7,361 
Insurance contracts*Insurance contracts*— 101,632 — 101,632 Insurance contracts*— 98,041 — 98,041 
Available-for-sale securities:Available-for-sale securities:Available-for-sale securities:
Mortgage-backed securitiesMortgage-backed securities— 8,854 — 8,854 Mortgage-backed securities— 8,294 — 8,294 
U.S. Treasury securitiesU.S. Treasury securities— 2,622 — 2,622 U.S. Treasury securities— 2,536 — 2,536 
Total assets measured at fair valueTotal assets measured at fair value$— $122,496 $— $122,496 Total assets measured at fair value$— $116,232 $— $116,232 
*    The insurance contracts invest approximately 5463 percent in fixed-income investments, 19 percent in common stock of large-cap companies, 10 percent in common stock of mid-cap companies, 9 percent in common stock of small-cap companies, 6 percent in target date investments and 2 percent in cash equivalents.
21

Index
 Fair Value Measurements at December 31, 2021, Using 
Quoted Prices in
Active Markets
for Identical
Assets
 (Level 1)
Significant
Other
Observable
Inputs
(Level 2)
Significant
Unobservable
Inputs
 (Level 3)
Balance at December 31, 2021
(In thousands)
Assets:    
Money market funds$— $10,190 $— $10,190 
Insurance contracts*— 109,603 — 109,603 
Available-for-sale securities:
Mortgage-backed securities— 8,706 — 8,706 
U.S. Treasury securities— 2,396 — 2,396 
Total assets measured at fair value$— $130,895 $— $130,895 
*    The insurance contracts invest approximately 61 percent in fixed-income investments, 1715 percent in common stock of large-cap companies, 8 percent in common stock of mid-cap companies, 76 percent in common stock of small-cap companies, 56 percent in target date investments and 2 percent in cash equivalents.
The Company's money market funds are valued at the net asset value of shares held at the end of the quarter,period, based on published market quotations on active markets, or using other known sources including pricing from outside sources. The estimated fair value of the Company's mortgage-backed securities and U.S. Treasury securities are based on comparable market transactions, other observable inputs or other sources, including pricing from outside sources. The estimated fair value of the Company's insurance contracts are based on contractual cash surrender values that are determined primarily by investments in managed separate accounts of the insurer. These amounts approximate fair value. The managed separate accounts are valued based on other observable inputs or corroborated market data.
Though the Company believes the methods used to estimate fair value are consistent with those used by other market participants, the use of other methods or assumptions could result in a different estimate of fair value.
The Company applies the provisions of the fair value measurement standard to its nonrecurring, non-financial measurements, including long-lived asset impairments. These assets are not measured at fair value on an ongoing basis but are subject to fair value adjustments only in certain circumstances. The Company reviews the carrying value of its long-lived assets, excluding goodwill, whenever events or changes in circumstances indicate that such carrying amounts may not be recoverable.
The Company performed fair value assessments of the assets acquired and liabilities assumed in the business combinationscombination that occurred during 2021.2022. The fair value of these assets and liabilities were determined based on Level 2 and Level 3 inputs.
22

Index
The Company's long-term debt is not measured at fair value on the Consolidated Balance Sheets and the fair value is being provided for disclosure purposes only. The fair value was categorized as Level 2 in the fair value hierarchy and was based on discounted future cash flows using current market interest rates. The estimated fair value of the Company's Level 2 long-term debt was as follows:
March 31, 2022March 31, 2021December 31, 2021 March 31, 2023March 31, 2022December 31, 2022
(In thousands)(In thousands)
Carrying amountCarrying amount$2,747,763 $2,253,274 $2,741,900 Carrying amount$2,847,068 $2,747,763 $2,841,425 
Fair valueFair value$2,755,041 $2,473,806 $2,984,866 Fair value$2,535,125 $2,755,041 $2,469,625 
The carrying amounts of the Company's remaining financial instruments included in current assets and current liabilities approximate their fair values.
Note 15 - Debt
Certain debt instruments of the Company's subsidiaries contain restrictive and financial covenants and cross-default provisions. In order to borrow under the debt agreements, the subsidiary companies must be in compliance with the applicable covenants and certain other conditions, all of which the subsidiaries, as applicable, were in compliance with at March 31, 2022.2023. In the event the subsidiaries do not comply with the applicable covenants and other conditions, alternative sources of funding may need to be pursued.
Montana-Dakota's and Centennial's respective commercial paper programs are supported by revolving credit agreements. While the amount of commercial paper outstanding does not reduce available capacity under the respective revolving credit agreements, Montana-Dakota and Centennial do not issue commercial paper in an aggregate amount exceeding the available capacity under the credit agreements. The commercial paper borrowings may vary during the period, largely the result of fluctuations in working capital requirements due to the seasonality of certain operations of the Company's subsidiaries.
22

Index
Short-term debt
Cascade On January 20, 2023, Cascade entered into a $150.0 million term loan agreement with a SOFR-based interest rate and a maturity date of January 19, 2024. The agreement contains customary covenants and provisions, including a covenant of Cascade not to permit, at any time, the ratio of total debt to total capitalization to be greater than 65 percent. The covenants also include certain restrictions on the sale of certain assets, loans and investments.
Intermountain On January 20, 2023, Intermountain entered into a $125.0 million term loan agreement with a SOFR-based interest rate and a maturity date of January 19, 2024. In March 2023, Intermountain paid down $20.0 million of the outstanding balance. The agreement contains customary covenants and provisions, including a covenant of Intermountain not to permit, at any time, the ratio of total debt to total capitalization to be greater than 65 percent. The covenants also include certain restrictions on the sale of certain assets, loans and investments.
Centennial On March 18, 2022, Centennial entered into a $100.0 million term loan agreement with a SOFR-based variable interest rate and a maturity date of March 17, 2023. On March 17, 2023, Centennial amended this agreement to extend the maturity date to September 15, 2023. The agreement contains customary covenants and provisions, including a covenant of Centennial not to permit, at any time, the ratio of total debt to total capitalization to be greater than 65 percent. The covenants also include certain restrictions on the sale of certain assets, loans and investments.
23

Index
Long-term debt
Long-term Debt Outstanding Long-term debt outstanding was as follows:
Weighted
Average
Interest
Rate at
March 31, 2022
March 31, 2022March 31, 2021December 31, 2021
Weighted
Average
Interest
Rate at
March 31, 2023
March 31, 2023March 31, 2022December 31, 2022
(In thousands) (In thousands)
Senior Notes due on dates ranging from October 22, 2022 to September 15, 20614.28 %$2,275,000 $1,950,000 $2,125,000 
Senior Notes due on dates ranging from May 15, 2023 to June 15, 2062Senior Notes due on dates ranging from May 15, 2023 to June 15, 20624.32 %$2,258,500 $2,275,000 $2,258,500 
Commercial paper supported by revolving credit agreementsCommercial paper supported by revolving credit agreements.90 %348,500 218,900 450,300 Commercial paper supported by revolving credit agreements6.18 %462,600 348,500 415,500 
Credit agreements due on June 7, 20243.25 %85,800 43,350 127,500 
Medium-Term Notes due on dates ranging from September 15, 2027 to March 16, 2029Medium-Term Notes due on dates ranging from September 15, 2027 to March 16, 20297.32 %35,000 35,000 35,000 Medium-Term Notes due on dates ranging from September 15, 2027 to March 16, 20297.32 %35,000 35,000 35,000 
Credit agreements due on dates ranging from December 19, 2024 to November 30, 2027Credit agreements due on dates ranging from December 19, 2024 to November 30, 20278.04 %89,144 85,800 130,000 
Term Loan Agreement due on September 3, 2032Term Loan Agreement due on September 3, 20322.00 %7,700 8,400 7,700 Term Loan Agreement due on September 3, 20323.64 %7,000 7,700 7,000 
Other notes due on dates ranging from January 1, 2024 to January 1, 2061Other notes due on dates ranging from January 1, 2024 to January 1, 2061.95 %2,445 3,282 2,564 Other notes due on dates ranging from January 1, 2024 to January 1, 20611.43 %1,561 2,445 2,253 
Less unamortized debt issuance costsLess unamortized debt issuance costs6,605 5,655 6,090 Less unamortized debt issuance costs6,453 6,605 6,542 
Less discountLess discount77 74 Less discount284 77 286 
Total long-term debtTotal long-term debt2,747,763 2,253,274 2,741,900 Total long-term debt2,847,068 2,747,763 2,841,425 
Less current maturitiesLess current maturities147,953 1,552 148,053 Less current maturities78,031 147,953 78,031 
Net long-term debtNet long-term debt$2,599,810 $2,251,722 $2,593,847 Net long-term debt$2,769,037 $2,599,810 $2,763,394 
Schedule of Debt Maturities Long-term debt maturities, which excludes unamortized debt issuance costs and discount, at March 31, 2022,2023, were as follows:
Remainder of
2022
2023202420252026Thereafter
(In thousands)
Long-term debt maturities$147,953 $77,925 $495,104 $177,802 $140,802 $1,714,859 
Remainder of
2023
2024202520262027Thereafter
(In thousands)
Long-term debt maturities$78,031 $601,846 $177,802 $140,802 $111,452 $1,743,872 
Note 16 - Cash flow information
Cash expenditures for interest and income taxes were as follows:
Three Months EndedThree Months Ended
March 31, March 31,
20222021  20232022 
(In thousands) (In thousands)
Interest, net*Interest, net*$15,657 $14,303 Interest, net*$28,442 $15,657 
Income taxes paid (refunded), netIncome taxes paid (refunded), net$(363)$13,880 Income taxes paid (refunded), net$8,122 $(363)
*    AFUDC - borrowed was $586,000$2.4 million and $348,000$586,000 for the three months ended March 31, 20222023 and 2021,2022, respectively.
Noncash investing and financing transactions were as follows:
March 31, 2022March 31, 2021December 31, 2021March 31, 2023March 31, 2022December 31, 2022
(In thousands)(In thousands)
Right-of-use assets obtained in exchange for new operating lease liabilitiesRight-of-use assets obtained in exchange for new operating lease liabilities$10,175 $9,236 $55,987 Right-of-use assets obtained in exchange for new operating lease liabilities$15,095 $10,175 $50,921 
Property, plant and equipment additions in accounts payableProperty, plant and equipment additions in accounts payable$25,730 $20,594 $57,605 Property, plant and equipment additions in accounts payable$32,171 $25,730 $49,602 
Debt assumed in connection with a business combination$— $— $10 
Accrual for holdback payment related to a business combinationAccrual for holdback payment related to a business combination$— $— $70 
Stock issued in connection with a business combinationStock issued in connection with a business combination$— $— $7,304 
2324

Index
Note 17 - Business segment data
The Company's reportable segments are those that are based on the Company's method of internal reporting, which generally segregates the strategic business units due to differences in products, services and regulation. The internal reporting of these operating segments is defined based on the reporting and review process used by the Company's chief executive officer. The Company's operations are located within the United States.
The electric segment generates, transmits and distributes electricity in Montana, North Dakota, South Dakota and Wyoming. The natural gas distribution segment distributes natural gas in those states, as well as in Idaho, Minnesota, Oregon and Washington. These operations also supply related value-added services.
The pipeline segment provides natural gas transportation and underground storage services through a regulated pipeline system primarily in the Rocky Mountain and northern Great Plains regions of the United States. This segment also provides non-regulated cathodic protection and other energy-related services.
The construction materials and contracting segment mines, processes and sells construction aggregates (crushed stone and sand and gravel); produces and sells asphalt mix;asphalt; and supplies ready-mix concrete. This segment focuses onsegment's aggregate reserves provide the foundation for the vertical integration of its contracting services with its construction materials to support theits aggregate-based product lines including aggregate placement,heavy-civil construction, asphalt andpaving, concrete paving,construction and site development and grading. Although not common to all locations, other products includethe segment also includes the sale of cement, liquid asphalt oil for various commercialmodification and roadway applications,distribution, various finished concrete products, merchandise and other building materials and related contracting services. This segment operates in the central, southern and western United States, including Alaska and Hawaii.
The construction services segment provides a full spectrum of construction services through its electrical and mechanical and transmission and distribution specialty contracting services across the country.United States. These specialty contracting services are provided to utilities, and manufacturing, transportation, commercial, industrial, institutional, renewable and governmental customers. Its electrical and mechanical contracting services include construction and maintenance of electrical and communication wiring and infrastructure, fire suppression systems, and mechanical piping and services. Its transmission and distribution contracting services include construction and maintenance of overhead and underground electrical, gas and communication infrastructure, as well as manufacturing and distribution of transmission line construction equipment and tools.
The Other category includes the activities of Centennial Capital, which, through its subsidiary InterSource Insurance Company, insures various types of risks as a captive insurer for certain of the Company's subsidiaries. The function of the captive insurer is to fund the self-insured layers of the insured Company's general liability, automobile liability, pollution liability and other coverages. Centennial Capital also owns certain real and personal property. In addition, the Other category includes certain assets, liabilities and tax adjustments of the holding company primarily associated with corporate functions, andas well as costs associated with the announced strategic initiatives. Also included are certain general and administrative costs (reflected in operation and maintenance expense) and interest expense, which were previously allocated to the refining business and Fidelity and do not meet the criteria for income (loss) from discontinued operations.
Discontinued operations include the supporting activities of Fidelity other than certain general and administrative costs and interest expense as described above.
The information below follows the same accounting policies as described in Note 2 of the Notes to Consolidated Financial Statements in the 20212022 Annual Report. Information on the Company's segments was as follows:
Three Months EndedThree Months Ended
March 31,March 31,
2022 2021  2023 2022 
(In thousands) (In thousands)
External operating revenues:External operating revenues: External operating revenues: 
Regulated operations:Regulated operations:Regulated operations:
ElectricElectric$93,594 $84,673 Electric$95,602 $93,594 
Natural gas distributionNatural gas distribution450,418 350,206 Natural gas distribution565,517 450,418 
PipelinePipeline9,444 7,502 Pipeline12,638 9,444 
553,456 442,381  673,757 553,456 
Non-regulated operations:Non-regulated operations:Non-regulated operations:
PipelinePipeline1,676 2,411 Pipeline1,693 1,676 
Construction materials and contractingConstruction materials and contracting309,836 265,659 Construction materials and contracting307,768 309,836 
Construction servicesConstruction services551,591 517,470 Construction services754,119 551,591 
OtherOther— 17 Other— — 
863,103 785,557  1,063,580 863,103 
Total external operating revenuesTotal external operating revenues$1,416,559 $1,227,938 Total external operating revenues$1,737,337 $1,416,559 
2425

Index
Three Months EndedThree Months Ended
March 31,March 31,
2022 2021  2023 2022 
(In thousands) (In thousands)
Intersegment operating revenues:Intersegment operating revenues: Intersegment operating revenues: 
Regulated operations:Regulated operations:Regulated operations:
ElectricElectric$124 $136 Electric$122 $124 
Natural gas distributionNatural gas distribution136 142 Natural gas distribution150 136 
PipelinePipeline25,933 25,990 Pipeline26,259 25,933 
26,193 26,268 26,531 26,193 
Non-regulated operations:Non-regulated operations:Non-regulated operations:
PipelinePipeline239 Pipeline151 
Construction materials and contractingConstruction materials and contracting130 62 Construction materials and contracting132 130 
Construction servicesConstruction services1,059 1,042 Construction services214 1,059 
OtherOther4,341 3,324 Other4,739 4,341 
5,537 4,667 5,236 5,537 
Intersegment eliminations(31,730)(30,935)
Total intersegment operating revenuesTotal intersegment operating revenues$— $— Total intersegment operating revenues$31,767 $31,730 
Operating income (loss):Operating income (loss):Operating income (loss):
ElectricElectric$15,044 $13,865 Electric$21,091 $15,044 
Natural gas distributionNatural gas distribution56,256 53,573 Natural gas distribution58,505 56,256 
PipelinePipeline11,882 12,536 Pipeline13,040 11,882 
Construction materials and contractingConstruction materials and contracting(44,605)(34,889)Construction materials and contracting(44,563)(44,605)
Construction servicesConstruction services29,498 40,277 Construction services35,217 29,498 
OtherOther(732)(198)Other(8,818)(732)
Total operating incomeTotal operating income$67,343 $85,164 Total operating income$74,472 $67,343 
Net income (loss):Net income (loss):Net income (loss):
Regulated operations:Regulated operations:Regulated operations:
ElectricElectric$11,278 $10,749 Electric$16,607 $11,278 
Natural gas distributionNatural gas distribution36,315 36,178 Natural gas distribution38,928 36,315 
PipelinePipeline7,956 9,194 Pipeline8,759 7,956 
55,549 56,121 64,294 55,549 
Non-regulated operations:Non-regulated operations:Non-regulated operations:
PipelinePipeline(619)(296)Pipeline(460)(619)
Construction materials and contractingConstruction materials and contracting(40,010)(30,813)Construction materials and contracting(41,320)(40,010)
Construction servicesConstruction services21,324 29,825 Construction services26,074 21,324 
OtherOther(4,511)(2,721)Other(10,245)(4,511)
(23,816)(4,005)(25,951)(23,816)
Income from continuing operationsIncome from continuing operations31,733 52,116 Income from continuing operations38,343 31,733 
Income from discontinued operations, net of tax30 15 
Discontinued operations, net of taxDiscontinued operations, net of tax10 30 
Net incomeNet income$31,763 $52,131 Net income$38,353 $31,763 
A reconciliation of reportable segment operating revenues to consolidated operating revenues is as follows:
Three Months Ended
March 31,
2023 2022 
(In thousands)
Operating revenues reconciliation:
Total reportable segment operating revenues$1,764,365 $1,443,948 
Other revenue4,739 4,341 
Elimination of intersegment operating revenues(31,767)(31,730)
Total consolidated operating revenues$1,737,337 $1,416,559 
2526

Index
Note 18 - Employee benefit plans
Pension and other postretirement plans
The Company has noncontributory qualified defined benefit pension plans and other postretirement benefit plans for certain eligible employees.
Components of net periodic benefit credit for the Company's pension benefit plans were as follows:
Three Months EndedThree Months Ended
March 31,March 31,
2022202120232022
(In thousands)(In thousands)
Components of net periodic benefit credit:Components of net periodic benefit credit:Components of net periodic benefit credit:
Interest costInterest cost$2,631 $2,455 Interest cost$3,789 $2,631 
Expected return on assetsExpected return on assets(4,864)(4,894)Expected return on assets(4,749)(4,864)
Amortization of net actuarial lossAmortization of net actuarial loss1,671 2,004 Amortization of net actuarial loss901 1,671 
Net periodic benefit creditNet periodic benefit credit$(562)$(435)Net periodic benefit credit$(59)$(562)
Components of net periodic benefit credit for the Company's other postretirement benefit plans were as follows:
Three Months EndedThree Months Ended
March 31,March 31,
2022202120232022
(In thousands)(In thousands)
Components of net periodic benefit credit:Components of net periodic benefit credit:Components of net periodic benefit credit:
Service costService cost$354 $400 Service cost$227 $354 
Interest costInterest cost474 466 Interest cost670 474 
Expected return on assetsExpected return on assets(1,322)(1,275)Expected return on assets(1,341)(1,322)
Amortization of prior service creditAmortization of prior service credit(350)(349)Amortization of prior service credit(350)(350)
Amortization of net actuarial (gain) loss(54)
Amortization of net actuarial gainAmortization of net actuarial gain(213)(54)
Net periodic benefit credit, including amount capitalizedNet periodic benefit credit, including amount capitalized(898)(752)Net periodic benefit credit, including amount capitalized(1,007)(898)
Less amount capitalizedLess amount capitalized31 39 Less amount capitalized24 31 
Net periodic benefit creditNet periodic benefit credit$(929)$(791)Net periodic benefit credit$(1,031)$(929)

The components of net periodic benefit credit, other than the service cost component, are included in other income on the Consolidated Statements of Income. The service cost component is included in operation and maintenance expense on the Consolidated Statements of Income.
Nonqualified defined benefit plans
In addition to the qualified defined benefit pension plans reflected in the table at the beginning of this note, the Company also has unfunded, nonqualified defined benefit plans for executive officers and certain key management employees. The Company's net periodic benefit cost for these plans was $773,000$936,000 and $769,000$773,000 for the three months ended March 31, 20222023 and 2021,2022, respectively. The components of net periodic benefit cost for these plans are included in other income on the Consolidated Statements of Income.
Note 19 - Regulatory matters
The Company regularly reviews the need for electric and natural gas rate changes in each of the jurisdictions in which service is provided. The Company files for rate adjustments to seek recovery of operating costs and capital investments, as well as reasonable returns as allowed by regulators. Certain regulatory proceedings and cases may also contain recurring mechanisms that can have an annual true-up. Examples of these recurring mechanisms include: infrastructure riders, transmission trackers, renewable resource cost adjustment riders, as well as weather normalization and decoupling mechanisms. The following paragraphs summarize the Company's significant open regulatory proceedings and cases by jurisdiction including updates to those reported in the 20212022 Annual Report.Report and should be read in conjunction with previous filings. The Company is unable to predict the ultimate outcome of these matters, the timing of final decisions of the various regulators and courts, or the effect on the Company's results of operations, financial position or cash flows.
IPUC
Intermountain filed a request with the IPUC for a natural gas general rate increase on December 1, 2022. The request was for an increase of $11.3 million annually or 3.2 percent above current rates, which was revised on March 9, 2023, to $6.8 million annually or 1.9 percent above current rates. The requested increase is primarily to recover investments made since the last rate case in 2016 and the depreciation, operation and maintenance expenses and taxes associated with the increased investments. A
26
27

Index
MNPUC
Great Plains defers the difference between the actual cost of gas spent to serve customers and that recovered from customers on a monthly basis. Annually, Great Plains prepares a true-up pursuant to the purchased gas adjustment tariff. On August 30, 2021, the MNPUC issued an order to allow Great Plains recovery of an out-of-cycle cost of gas adjustment of $8.8 million over a period of 27 months. The order was effective September 1, 2021,settlement in principle has been reached and is subject to a prudence review by the MNPUC. The requested increase was for the February 2021 extreme cold weather, primarily in the central United States, and market conditions surrounding the natural gas commodity market. The MNPUC prudence review is pending with an orderexpected to be issued on or before August 29, 2022.
SDPUC
Montana-Dakota has a transmission cost recovery rider that allows annual updates to rates for actual costs associatedfiled with transmission-related projects and services. On March 1, 2022, Montana-Dakota filed an annual update to its transmission cost recovery rider to recover a revenue requirement of approximately $2.5 million annually, which reflects a true-up of the prior period adjustment, resulting in an increase in current rates of approximately $1.5 million.IPUC no later than May 15, 2023. This matter is pending before the SDPUC.IPUC.
Montana-Dakota has an infrastructure rider rate tariff that allows for annual adjustments for recent projected capital costs and related expenses for projects determined to be recoverable under the electric tariff. MTPSC
On March 1,November 4, 2022, Montana-Dakota filed an annual update to its infrastructure rider requesting to recover a revenue requirement of approximately $940,000 annually, which reflects a true-up of the prior period adjustment, resulting in a decrease in current rates of approximately $88,000. On April 28, 2022, the SDPUC approved the rates as requested with an effective date of May 1, 2022.
WUTC
On September 30, 2021, Cascade filed an application with the WUTCMTPSC for a natural gasan electric general rate increase of approximately $13.7$10.5 million annually or approximately 5.115.2 percent above current rates.rates, which was revised on March 15, 2023, to $11.5 million annually or 17.0 percent above current rates to reflect the loss of a large industrial customer. The requested increase wasis primarily to recover investments made since the last rate case, including Heskett Unit 4, increases in infrastructure upgrades, as well as to recover 2021 wage increases.operation and maintenance expenses, and increases in property taxes. On March 22, 2022, Cascade filed a multi-party settlement and stipulation on behalf of Cascade andJanuary 24, 2023, the staff of the WUTC that would result in a revenue requirementMTPSC approved Montana-Dakota's request for an interim increase of approximately $10.7$1.7 million annually or approximately 4.02.7 percent above current rates.rates, subject to refund, effective February 1, 2023. The WUTCMTPSC has 119 months to render a final decision on the rate case. ThisThe matter is pending before the WUTC.MTPSC with a hearing scheduled for June 20, 2023.

NDPSC
On May 16, 2022, Montana-Dakota filed an application with the NDPSC for an electric general rate increase of approximately $25.4 million annually or 12.3 percent above current rates. The requested increase is primarily to recover investments in production, transmission and distribution facilities and the associated depreciation, operation and maintenance expenses and taxes associated with the increased investment. On July 14, 2022, the NDPSC approved an interim rate increase of approximately $10.9 million annually or 5.3 percent above current rates, subject to refund, for service rendered on and after July 15, 2022. The lower interim rate increase is largely due to excluding the recovery of Heskett Unit 4 from interim rates due to not being in service until summer of 2023. On April 26, 2023, the Company filed with the NDPSC an all-party settlement reflecting an annual revenue increase of $15.3 million or 7.4 percent overall. The reduction from the original filing includes a return on equity of 9.75 percent and maintaining depreciation expense at current levels. A hearing was held May 2, 2023. The matter is pending before the NDPSC.
WUTC
On March 24, 2022, Cascade filed a request for a tariff revision with the WUTC to rectify an inadvertent IRS normalization violation resulting from its tariff established in 2018 that passes back to customers the reversal of plant-related excess deferred income taxes through an annual rate adjustment. This request was made in response to the issuanceissuances of an IRS private letter ruling to another Washington utility with the same annual rate adjustment tariff, which addressed its normalization violation.violations. The private letter ruling concluded the tariff to refund excess deferred income taxes without corresponding adjustments for other components of rate base or changes in depreciation or income tax expense, is an impermissible methodology under the IRS normalization and consistency rules. Cascade's request proposesproposed a similar remedy through the tariff to recover the excess amounts refunded to customers while this tariff has been in place, and revisesrevised the method going forward to reflect excess deferred income taxes in rates in the same manner as other components of rate base from its most recent general rate case. Cascade has requested recovery of the excess refunded to customers of approximately $3.3 million and elimination of the currently deferred, but not yet refunded balance. ThisA multi-party settlement was filed with the WUTC on October 21, 2022. On January 23, 2023, the WUTC denied recovery of the excess refunded to customers, but approved the tariff revision going forward to rectify the inadvertent normalization violation. On February 1, 2023, Cascade filed a motion for clarification with the WUTC on the currently deferred but not yet refunded balance. A clarifying conference was held on February 27, 2023, resulting in approval to reverse the currently deferred but not yet refunded balance of approximately $1.1 million. On February 28, 2023, this matter iswas finalized by the WUTC with rates effective March 1, 2023.
FERC
On January 27, 2023, WBI Energy Transmission filed a general rate case with the FERC for increases in its transportation and storage services rates that also includes a Greenhouse Gas Cost Recovery Mechanism for anticipated future costs. New rates, which are pending before the WUTC.FERC approval, will be in effect August 1, 2023.
Note 20 - Contingencies
The Company is party to claims and lawsuits arising out of its business and that of its consolidated subsidiaries, which may include, but are not limited to, matters involving property damage, personal injury, and environmental, contractual, statutory and regulatory obligations. The Company accrues a liability for those contingencies when the incurrence of a loss is probable and the amount can be reasonably estimated. If a range of amounts can be reasonably estimated and no amount within the range is a better estimate than any other amount, then the minimum of the range is accrued. The Company does not accrue liabilities when the likelihood that the liability has been incurred is probable but the amount cannot be reasonably estimated or when the liability is believed to be only reasonably possible or remote. For contingencies where an unfavorable outcome is probable or reasonably possible and which are material, the Company discloses the nature of the contingency and, in some circumstances, an estimate of the possible loss. Accruals are based on the best information available, but in certain situations management is unable to estimate an amount or range of a reasonably possible loss including, but not limited to when: (1) the damages are unsubstantiated or indeterminate, (2) the proceedings are in the early stages, (3) numerous parties are involved, or (4) the matter involves novel or unsettled legal theories.
At March 31, 20222023 and 2021,2022, and December 31, 2021,2022, the Company accrued contingent liabilities, which have not been discounted, of $25.4 million, $30.0 million $55.0 million and $37.0$32.9 million, respectively. At March 31, 20222023 and 2021,2022, and December 31, 2021,2022, the Company also recorded corresponding insurance receivables of $3.3 million, $7.1 million $31.6and $10.4 million, and $14.1 million,
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respectively, and regulatory assets of $20.9 million, $20.8 million $20.9 million and $21.2$20.9 million, respectively, related to the accrued liabilities. The accruals are for contingencies resulting from litigation production taxes, royalty claims and environmental matters. This includes amounts that have been accrued for matters discussed in Environmental matters within this note. The Company will continue to monitor each matter and adjust accruals as might be warranted based on new information and further developments. Management believes that the outcomes with respect to probable and reasonably possible losses in excess of the amounts accrued, net of insurance
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recoveries, while uncertain, either cannot be estimated or will not have a material effect upon the Company's financial position, results of operations or cash flows. Unless otherwise required by GAAP, legal costs are expensed as they are incurred.
Environmental matters
The Company is a party to claims for the cleanup of environmental contamination at certain manufactured gas plant sites, as well as a superfund site. There were no material changes to the Company's environmental matters that were previously reported in the 20212022 Annual Report.
Guarantees
Certain subsidiaries of the Company have outstanding guarantees to third parties that guarantee the performance of other subsidiaries of the Company. These guarantees are related to construction contracts, insurance deductibles and loss limits, and certain other guarantees. At March 31, 2022,2023, the fixed maximum amounts guaranteed under these agreements aggregate $147.9$350.0 million. Certain of the guarantees also have no fixed maximum amounts specified. At March 31, 2022,2023, the amounts of scheduled expiration of the maximum amounts guaranteed under these agreements aggregate to $48.5 million in 2022; $44.3$28.3 million in 2023; $44.3$144.1 million in 2024; $800,000$163.3 million in 2025; $800,000$1.5 million in 2026; $200,000$1.0 million in 2027; $300,000 thereafter; and $9.0$11.5 million, which has no scheduled maturity date. There were no amounts outstanding under the previously mentioned guarantees at March 31, 2022.2023. In the event of default under these guarantee obligations, the subsidiary issuing the guarantee for that particular obligation would be required to make payments under its guarantee.
Certain subsidiaries have outstanding letters of credit to third parties related to insurance policies and other agreements, some of which are guaranteed by other subsidiaries of the Company. At March 31, 2022,2023, the fixed maximum amounts guaranteed under these letters of credit aggregated $29.2$26.0 million. At March 31, 2022,2023, the amounts of scheduled expiration of the maximum amounts guaranteed under these letters of credit aggregate to $28.6$25.6 million in 2022 and $600,0002023, $400,000 in 2023.2024. There were no amounts outstanding under the previously mentioned letters of credit at March 31, 2022.2023. In the event of default under these letter of credit obligations, the subsidiary guaranteeing the letter of credit would be obligated for reimbursement of payments made under the letter of credit.
In addition, Centennial, Knife River and MDU Construction Services have issued guarantees to third parties related to the routine purchase of maintenance items, materials and lease obligations for which no fixed maximum amounts have been specified. These guarantees have no scheduled maturity date. In the event a subsidiary of the Company defaults under these obligations, Centennial, Knife River or MDU Construction Services would be required to make payments under these guarantees. Any amounts outstanding by subsidiaries of the Company were reflected on the Consolidated Balance Sheet at March 31, 2022.2023.
In the normal course of business, Centennial has surety bonds related to construction contracts and reclamation obligations of its subsidiaries. In the event a subsidiary of Centennial does not fulfill a bonded obligation, Centennial would be responsible to the surety bond company for completion of the bonded contract or obligation. A large portion of the surety bonds is expected to expire within the next 12 months; however, Centennial will likely continue to enter into surety bonds for its subsidiaries in the future. At March 31, 2022,2023, approximately $1.1$1.6 billion of surety bonds were outstanding, which were not reflected on the Consolidated Balance Sheet.
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Variable interest entities
The Company evaluates its arrangements and contracts with other entities to determine if they are VIEs and if so, if the Company is the primary beneficiary.
Fuel Contract Coyote Station entered into a coal supply agreement with Coyote Creek that provides for the purchase of coal necessary to supply the coal requirements of the Coyote Station for the period May 2016 through December 2040. Coal purchased under the coal supply agreement is reflected in inventories on the Consolidated Balance Sheets and is recovered from customers as a component of electric fuel and purchased power.
The coal supply agreement creates a variable interest in Coyote Creek due to the transfer of all operating and economic risk to the Coyote Station owners, as the agreement is structured so that the price of the coal will cover all costs of operations, as well as future reclamation costs. The Coyote Station owners are also providing a guarantee of the value of the assets of Coyote Creek as they would be required to buy the assets at book value should they terminate the contract prior to the end of the contract term and are providing a guarantee of the value of the equity of Coyote Creek in that they are required to buy the entity at the end of the contract term at equity value. Although the Company has determined that Coyote Creek is a VIE, the Company has concluded that it is not the primary beneficiary of Coyote Creek because the authority to direct the activities of the entity is shared by the four unrelated owners of the Coyote Station, with no primary beneficiary existing. As a result, Coyote Creek is not required to be consolidated in the Company's financial statements.
At March 31, 2022,2023, the Company's exposure to loss as a result of the Company's involvement with the VIE, based on the Company's ownership percentage, was $31.0$29.1 million.
Note 21 - Subsequent event
On April 21, 2023, Intermountain repaid an additional $30.0 million of the $125.0 million term loan agreement issued on January 20, 2023. For more information on this debt agreement, see Note 15.
On April 25, 2023, Knife River Holding Company issued $425.0 million of 7.75 percent senior notes due May 1, 2031, pursuant to an indenture agreement. The proceeds from the issuance of these notes will be held in escrow until the effective date of the Knife River separation or, if the separation does not occur within the time frame specified, released back to the lenders, along with accrued interest.
On May 1, 2023, the Company entered into a $75.0 million term loan agreement with a SOFR-based interest rate and a maturity date of November 1, 2023. The agreement contains customary covenants and provisions, including a covenant of the Company not to permit, at any time, the ratio of total debt to total capitalization to be greater than 65 percent. The covenants also include certain restrictions on the sale of certain assets, loans and investments.

On May 3, 2023, the Company's board of directors approved the separation and the distribution of approximately 90 percent of the issued and outstanding shares of Knife River Holding Company to the Company's stockholders. Stockholders of the Company will receive one share of Knife River Holding Company common stock for every four shares of the Company's common stock held on May 22, 2023, the record date for the distribution. The Company will retain approximately 10 percent of Knife River Holding Company's common stock immediately following the separation with the intent to dispose of such shares within twelve months after the separation. Prior to completing the separation, the Company may adjust the percentage of Knife River Holding Company common stock to be distributed to the Company's stockholders and retained by the Company in response to market and other factors. The separation is expected to be complete May 31, 2023, subject to certain conditions, including the SEC declaring the registration statement on Form 10 for Knife River Holding Company to be effective.
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Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations
The Company is Building a Strong America® by providing essential infrastructure and services through its regulated energy delivery and construction materials and services businesses.services. The Company and its employees work hard to keep the economy of America moving with the products and services provided, which include powering, heating and connecting homes, factories, offices and stores; and building roads, highways, data infrastructure and airports.
The Company's two-platform business model, regulated energy delivery and construction materials and services, are each comprised of different operating segments. Most of these segments experience seasonality related to the industries in which they operate. The two-platform approach helps balance this seasonality and the risks associated with each type of industry. The Company is authorized to conduct business in nearly every state in the United States and during peak construction season has employed over 16,00016,800 employees. The Company's organic investments are strong drivers of high-quality earnings and continue to be an important part of the Company's growth. Management believes the Company is well positioned in the industries and markets in which it operates.
Strategic Initiatives As part of the Company's continuous review of its business, the Company announced strategic initiatives in 2022 that are expected to enhance its value. The Company continuesincurred costs in connection with the announced strategic initiatives in 2022 and 2023, as noted in the Business Segment Financial and Operating Data section, and expects to effectively executecontinue to incur these costs until the initiatives are completed.
On August 4, 2022, the Company announced that its strategyboard of directors approved a plan to pursue the separation of Knife River, the construction materials and contracting segment, from the Company. The separation will result in two independent, publicly traded companies, MDU Resources Group, Inc. and Knife River Holding Company, and is continually adjusting its businessesexpected to be completed on May 31, 2023, subject to certain conditions, including the SEC declaring the Registration Statement on Form 10 for Knife River Holding Company to be effective. On May 3, 2023, the Company's board of directors approved the separation and the distribution of approximately 90 percent of the issued and outstanding shares of Knife River Holding Company to the Company's stockholders. Stockholders of the Company will receive one share of Knife River Holding Company common stock for every four shares of the Company's common stock held on May 22, 2023, the record date for the distribution. The Company will retain approximately 10 percent of Knife River Holding Company's common stock immediately following the separation with the intent to dispose of such shares within twelve months after the separation. Prior to completing the separation, the Company may adjust the percentage of Knife River Holding Company common stock to be distributed to the Company's stockholders and retained by the Company in response to market and other factors. The separation of Knife River is planned as a tax-free spinoff transaction to the ongoing effects ofCompany’s stockholders for U.S. federal income tax purposes. More information on the COVID-19 pandemic. Most ofseparation and distribution can be found within the Form 10, which is not incorporated by reference herein.
On November 3, 2022, the Company announced its intention to create two pure-play publicly traded companies, one focused on regulated energy delivery and the other on construction materials, and that, to achieve this future structure, the Company's productsboard of directors authorized management to commence a strategic review process of MDU Construction Services. The strategic review is underway and services are considered essentialthe Company anticipates completing the strategic review during the second quarter of 2023. For more information on the strategic initiatives, see Part II, Item IA. Risk Factors in this quarterly report, Part 1, Item 1A. Risk Factors in the 2022 Annual Report and subsequent filings with the SEC.
Market Trends While recent banking and economic issues has created some disruption in the commercial paper market, the Company has not experienced liquidity issues. Further, the Company has the ability to Americaborrow against the revolving credit facilities of Centennial and its communities and, as a result, operations have generally continued.Montana-Dakota, providing the Company with flexibility in the current commercial paper market. The Company continues to monitor the situationfinancial services disruptions but does not have any material exposure to recently distressed financial institutions. Rising interest rates have resulted in and there have been no material adversewill likely continue to result in higher borrowing costs on new debt, resulting in impacts from COVID-19 onto the Company's resultsasset valuations and negatively impacting the purchasing power of operations. its customers.
The Company continues to manage the inflationary pressures experienced throughout the United States, including the impact that inflation, rising interest rates, commodity price volatility and supply chain disruptions may have on its business and customers and proactively looks for ways to lessen the impact to its business. The Company has continued to evaluate its businesses and has increased pricing for its products and services where possible. The ability to raise selling prices to cover higher costs due to inflation are subject to customer demand, industry competition and the availability of materials, among other things.
For more information on possible impacts of these trends to the Company's businesses, see the Outlook for each segment below and Part I, Item 1A. Risk Factors in the 2021 Form 10-K.2022 Annual Report.
Forward-Looking Statements
The following sections contain forward-looking statements within the meaning of Section 21E of the Exchange Act. Forward-looking statements are all statements other than statements of historical fact, including without limitation those statements that are identified by the words "anticipates," "estimates," "expects," "intends," "plans," "predicts" and similar expressions, and include statements concerning plans, trends, objectives, goals, strategies, future events, including the separation of Knife River or the proposed structure of two pure-play publicly traded companies, future events or performance, and underlying assumptions (many of which are based, in turn, upon further assumptions) and other statements that are other than statements of historical facts. From time to time, the Company may publish or otherwise make available forward-looking statements of this nature, including statements contained within Business Segment Financial and Operating Data.
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Forward-looking statements involve risks and uncertainties, which could cause actual results or outcomes to differ materially from those expressed. The Company's expectations, beliefs and projections are expressed in good faith and are believed by the Company to have a reasonable basis, including without limitation, management's examination of historical operating trends, data contained in the Company's records and other data available from third parties. Nonetheless, the Company's expectations, beliefs or projections may not be achieved or accomplished and changes in such assumptions and factors could cause actual future results to differ materially.
Any forward-looking statement contained in this document speaks only as of the date on which the statement is made, and the Company undertakes no obligation to update any forward-looking statement or statements to reflect events or circumstances that occur after the date on which the statement is made or to reflect the occurrence of unanticipated events.events, except as required by law. New factors emerge from time to time, and it is not possible for management to predict all the factors, nor can it assess the effect of each factor on the Company's business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statement. All forward-looking statements, whether written or oral and whether made by or on behalf of the Company, are expressly qualified by the risk factors and cautionary statements reported in Part II, Item 1A. Risk Factors in this quarterly report, Part I, Item 1A. Risk Factors in the 20212022 Annual Report and subsequent filings with the SEC.
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Consolidated Earnings Overview
The following table summarizes the contribution to the consolidated income by each of the Company's business segments.
Three Months EndedThree Months Ended
March 31,March 31,
2022 2021  2023 2022 
(In millions, except per share amounts)(In millions, except per share amounts)
ElectricElectric$11.3 $10.7 Electric$16.6 $11.3 
Natural gas distributionNatural gas distribution36.3 36.2 Natural gas distribution38.9 36.3 
PipelinePipeline7.3 8.9 Pipeline8.3 7.3 
Construction materials and contractingConstruction materials and contracting(40.0)(30.8)Construction materials and contracting(41.3)(40.0)
Construction servicesConstruction services21.3 29.8 Construction services26.1 21.3 
OtherOther(4.5)(2.7)Other(10.3)(4.5)
Income from continuing operationsIncome from continuing operations31.7 52.1 Income from continuing operations38.3 31.7 
Discontinued operations, net of taxDiscontinued operations, net of tax— — Discontinued operations, net of tax— — 
Net incomeNet income$31.7 $52.1 Net income$38.3 $31.7 
Earnings per share - basic:Earnings per share - basic: Earnings per share - basic: 
Income from continuing operationsIncome from continuing operations$.16 $.26 Income from continuing operations$.19 $.16 
Discontinued operations, net of taxDiscontinued operations, net of tax— — Discontinued operations, net of tax— — 
Earnings per share - basicEarnings per share - basic$.16 $.26 Earnings per share - basic$.19 $.16 
Earnings per share - diluted:Earnings per share - diluted: Earnings per share - diluted: 
Income from continuing operationsIncome from continuing operations$.16 $.26 Income from continuing operations$.19 $.16 
Discontinued operations, net of taxDiscontinued operations, net of tax— — Discontinued operations, net of tax— — 
Earnings per share - dilutedEarnings per share - diluted$.16 $.26 Earnings per share - diluted$.19 $.16 
Three Months Ended March 31, 2022,2023, Compared to Three Months Ended March 31, 20212022 The Company's consolidated earnings decreased $20.4increased $6.6 million.
The Company benefited from increased earnings across the regulated energy delivery and construction services businesses, partially offset by a slightly higher seasonal loss at the construction materials and contracting business. Earnings at the electric business were positively impacted by interim rate relief in certain jurisdictions and lower operating expenses associated with the closure of Units 1 and 2 at Heskett Station. Revenues were higher at the natural gas distribution business due to approved rate relief in Washington and a 4.2 percent increase in retail sales volumes to all customer classes due to colder weather, partially offset by higher operation and maintenance expense. Earnings at the pipeline business increased largely from increased transportation volumes due to a full quarter of benefit from the North Bakken Expansion project and its increased contracted volume commitments beginning in February 2023. The construction services business saw increased revenues across most sectors, which were partially offset by higher operating costs attributable to inflationary pressures. The construction materials and contracting business experienced lower marginsreported a higher seasonal loss as a result of unfavorable weather across most regions, particularly in the Pacific region, but was able to increase gross profit largely from increases in average selling prices across its product lines. All of the Company's businesses were impacted by increased interest rates as a result of higher fuel, repair and maintenance and labor-related costs,average interest rates, partially offset by increased average product pricing. The construction services business experienced decreased gross margin largely attributable to lower industrial margins due to the timinghigher investment returns of projects and less storm-repair and fire-hardening power line work that is typically higher-margin work, offset in part by increased commercial margins. The pipeline business experienced decreased natural gas storage-related revenue and higher operating expenses, partially offset by increased demand revenues associated with the North Bakken Expansion project.$9.1 million on nonqualified benefit plans. The Company's earnings were furtheralso impacted by $6.2costs incurred in 2023 in connection with announced strategic initiatives of $8.3 million, in lower returns on certain of the Company's benefit plan investments. Partially offsetting these decreases were higher residential retail sales volumes at the electric business and higher retail sales volumes across all customer classes, as well as approved rate relief in certain jurisdictions, at the natural gas distribution business.after tax.
A discussion of key financial data from the Company's business segments follows.
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Business Segment Financial and Operating Data
The following sections include key financial and operating data for each of the Company's business segments. Also included are highlights on key growth strategies, projections and certain assumptions for the Company and its subsidiaries and other matters of the Company's business segments.
For information pertinent to various commitments and contingencies, see the Notes to Consolidated Financial Statements. For a summary of the Company's business segments, see Note 17 of the Notes to Consolidated Financial Statements.
Electric and Natural Gas Distribution
Strategy and challenges The electric and natural gas distribution segments provide electric and natural gas distribution services to customers, as discussed in Note 17. Both segments strive to be top performing utility companies measured by integrity, employee safety and satisfaction, customer service and shareholderstockholder return. The segments provide safe, reliable, competitively priced and environmentally responsible energy service to customers while focusing on growth and expansion opportunities within and beyond its existing territories. The Company is focused on cultivating organic growth while managing operating costs and monitoring opportunities for these segments to retain, grow and expand their customer base through extensions of existing operations, including building and upgrading electric generation, transmission and distribution, and natural gas systems, and through selected acquisitions of companies and properties with similar operating and growth objectives at prices that will provide stable cash flows and an opportunity to earn a competitive return on investment. The continued efforts to create operational improvements and efficiencies across both segments promotes the Company's business integration strategy. The primary factors that impact the results of these segments are the ability to earn authorized rates of return, the cost of natural gas, cost of electric fuel and
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purchased power, weather,return; weather; climate change initiatives,laws, regulations and initiatives; competitive factors in the energy industry,industry; population growthgrowth; and economic conditions in the segments' service areas.
The electric and natural gas distribution segments are subject to extensive regulation in the jurisdictions where they conduct operations with respect to costs, timely recovery of investments and permitted returns on investment. The Company is focused on modernizing utility infrastructure to meet the varied energy needs of both its customers and communities while ensuring the delivery of safe, reliable, affordable and environmentally responsible reliable and affordable energy. The segments continue to invest in facility upgrades to be in compliance with existing and known future regulations. To assist in the reduction of regulatory lag in obtaining revenue increases to align with increased investments, tracking mechanisms have been implemented in certain jurisdictions. The Company also seeks rate adjustments for operating costs and capital investments, as well as reasonable returns on investments, not covered by tracking mechanisms. For more information on the Company's tracking mechanisms and recent rate cases, see Note 19 and the 20212022 Annual Report.
TheThese segments are also subject to extensive regulation related to certain operational and environmental compliance, cybersecurity, permit terms and system integrity. Both segments are faced with the ongoing need to actively evaluate cybersecurity processes and procedures related to its transmission and distribution systems for opportunities to further strengthen its cybersecurity protections. Within the past year, there have been cyber and physical attacks within the energy industry on infrastructure, such as substations, and the Company continues to evaluate the safeguards implemented to protect its electric and natural gas utility systems. Implementation of enhancements and additional requirements to protect the Company's infrastructure is ongoing.
To date, many states have enacted and others are considering, mandatory clean energy standards requiring utilities to meet certain thresholds of renewable and/or carbon-free energy supply. The current presidential administration has made climate change a focus, as further discussed in the Outlook section. Over the long-term, the Company expects overall electric demand to be positively impacted by increased electrification trends, including electric vehicle adoption, as a means to address economy-wide carbon emission concerns and changing customer conservation patterns. Recently, MISO and NERC announced concerns with reliability of the electric grid due to capacity shortages, which has resulted from rapid expansion of renewables and rapid reduction of baseload resources such as coal, while load growth has increased faster than expected. MISO received FERC approval of a seasonal resource adequacy construct and accreditation process, versus the previous annual summer peak capacity requirement process. These initiatives could result in increased costs to produce electricity and procure natural gas. Thechanges have not had a significant impact of these initiatives on the Company is unknown.capacity requirements for Montana-Dakota. The Company will continue to monitor the progress of these initiativeschanges and assess the potential impacts they may have on its stakeholders, business processes, results of operations, cash flows and disclosures.
Revenues are impacted by both customer growth and usage, the latter of which is primarily impacted by weather, as well as impacts associated with commercial and industrial slow-downs, including economic recessions, and energy efficiencies. Very cold winters increase demand for natural gas and to a lesser extent, electricity, while warmer than normal summers increase demand for electricity, especially among residential and commercial customers. Average consumption among both electric and natural gas customers has tended to decline as more efficient appliances and furnaces are installed, and as the Company has implemented conservation programs. Natural gas weather normalization and decoupling mechanisms in certain jurisdictions have been implemented to largely mitigate the effect that would otherwise be caused by variations in volumes sold to these customers due to weather and changing consumption patterns on the Company's distribution margins.
The electricIn December 2022 and January 2023, natural gas distribution segments continueprices significantly increased across the Pacific Northwest from multiple price-pressuring events including wide-spread below-normal temperatures and higher natural gas consumption; reduced natural gas flows due to facepipeline constraints, including maintenance in West Texas; and historically low regional natural gas storage levels. As of March 2023, natural gas prices have stabilized. The higher natural gas prices in December 2022 and January 2023 impacted both
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Intermountain and Cascade, both of which borrowed short-term debt of $125.0 million and $150.0 million, respectively, in January 2023 to finance the increased natural gas costs. To assist in the recovery of the higher natural gas costs, Intermountain filed an out-of-cycle purchased gas adjustment with the IPUC that was effective February 1, 2023. In March and April 2023, Intermountain repaid $20.0 million and $30 million, respectively, of the $125.0 million short-term debt.
The Company continues to proactively monitor and work with its manufacturers to reduce the effects of increased pricing and lead times on delivery of certain raw materials and equipment used in electric generation, transmission and distribution system and natural gas pipeline projects. Long lead times are attributable to increased demand for steel products from pipeline companies as they continue pipeline system safety and integrity replacement projects driven by PHMSA regulations, as well as delays in the manufacturing and shipping of electrical equipment as a result of the lingering effects of the COVID-19 pandemic, staffing shortages across multiple industries and subsequent supply chain issues. In addition,global conflicts. These segments have experienced delays and inflationary pressures, including increased costs related to purchased natural gas and capital expenditures. The Company has been able to minimize the segments are currently experiencing increased fuel costseffects by working closely with suppliers or obtaining additional suppliers, as well as other general inflationary pressures. The Company continuesmodifying project plans to monitor these risks and has practices in place to minimize the impacts of longaccommodate extended lead times and inflationary costs such as working with manufacturers to proactively order impacted materials, as well as working with additional suppliers. The segments have not experienced material delays or inflationary pressures.increased costs. The Company expects these delays and inflationary pressures to continue throughout the remainder of 2022.continue.
The ability to grow through acquisitions is subject to significant competition and acquisition premiums. In addition, the ability of the segments to grow their service territory and customer base is affected by regulatory constraints, the economic environment of the markets served, population changes and competition from other energy providers and fuels. The construction of new electric generating facilities, transmission lines and other service facilities is subject to increasing costs and lead times, extensive permitting procedures, and federal and state legislative and regulatory initiatives, which may necessitate increases in electric energy prices.
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As the industry continues to expand the use of renewable energy sources, the need for additional transmission infrastructure is growing. As part of MISO's long range transmission plan, in August 2022, the Company announced its intent to develop, construct and co-own an approximately 95 mile 345-kV transmission line with Otter Tail Power Company in central North Dakota.
Earnings overview - The following information summarizes the performance of the electric segment.
Three Months EndedThree Months Ended
March 31,March 31,
2022 2021 Variance 2023 2022 Variance
(In millions)(In millions)
Operating revenuesOperating revenues$93.7 $84.8 10 %Operating revenues$95.7 $93.7 %
Operating expenses:Operating expenses: Operating expenses: 
Electric fuel and purchased powerElectric fuel and purchased power26.3 18.6 41 %Electric fuel and purchased power24.4 26.3 (7)%
Operation and maintenanceOperation and maintenance30.8 31.3 (2)%Operation and maintenance29.9 30.8 (3)%
Depreciation, depletion and amortizationDepreciation, depletion and amortization16.9 16.1 %Depreciation, depletion and amortization15.6 16.9 (8)%
Taxes, other than incomeTaxes, other than income4.6 4.9 (6)%Taxes, other than income4.7 4.6 %
Total operating expensesTotal operating expenses78.6 70.9 11 %Total operating expenses74.6 78.6 (5)%
Operating incomeOperating income15.1 13.9 %Operating income21.1 15.1 40 %
Other income (expense)Other income (expense)(.3).5 (160)%Other income (expense)1.2 (.3)500 %
Interest expenseInterest expense7.1 6.5 %Interest expense6.8 7.1 (4)%
Income before income taxesIncome before income taxes7.7 7.9 (3)%Income before income taxes15.5 7.7 101 %
Income tax benefitIncome tax benefit(3.6)(2.8)29 %Income tax benefit(1.1)(3.6)(69)%
Net incomeNet income$11.3 $10.7 %Net income$16.6 $11.3 47 %
Operating statisticsThree Months Ended
March 31,
2022 2021 
Revenues (millions):
Retail sales:
Residential$35.2 $31.9 
Commercial33.6 31.4 
Industrial9.8 9.6 
Other1.6 1.5 
80.2 74.4 
Transportation and other13.5 10.4 
$93.7 $84.8 
Retail sales (million kWh)
Residential357.7 334.9 
Commercial364.1 361.8 
Industrial140.3 144.5 
Other19.5 19.2 
881.6 860.4 
Average cost of electric fuel and purchased power per kWh$.027 $.019 
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Operating statisticsThree Months Ended
March 31,
2023 2022 
Revenues (millions)
Retail sales:
Residential$36.2 $35.2 
Commercial34.8 33.6 
Industrial10.4 9.8 
Other1.7 1.6 
83.1 80.2 
Transportation and other12.6 13.5 
$95.7 $93.7 
Volumes (million kWh)
Retail sales:
Residential357.3 357.7 
Commercial385.5 364.1 
Industrial147.3 140.3 
Other20.2 19.5 
910.3 881.6 
Average cost of electric fuel and purchased power per kWh$.025 $.027 
Three Months Ended March 31, 2022,2023, Compared to Three Months Ended March 31, 20212022 Electric earnings increased $600,000$5.3 million as a result of:
Revenue increased $8.9$2.0 million.
Largely due to:
Interim rate relief of $3.1 million in certain jurisdictions.
Higher renewable tracker revenues of $600,000 associated with lower production tax credits offset in expense, as described below.
Higher per unit average rates of $500,000, largely related to block rates in certain jurisdictions.
Higher retail sales volumes of 3.3 percent attributable to commercial and industrial customers.
Partially offset by lower fuel and purchased power costs of $1.9 million recovered in customer rates that wereand offset in expense, as described below.
Higher retail sales volumes of 2.5 percent, primarily residential retail sales as a result of colder weather.
Higher transmission revenues, primarily from higher net transmission of $700,000 and higher transmission interconnect upgrades of $600,000.
Partially offset by lower per unit average rates of $900,000.
Electric fuel and purchased power increased $7.7 million.
Primarilydecreased $1.9 million, largely the result of higher MISOlower commodity costs, including recovery of $9.2 million as a result of increased energy costs.
Partiallyfuel clause adjustments, partially offset by decreased fuel costs associated with the Lewis & Clark Station and Heskett Station plant closures.higher retail sales volumes.
Operation and maintenance decreased $500,000.$900,000.
Largely resulting from decreased payroll-relatedthe result of:
Reduced costs of $1.0 million, largely$700,000 for straight time payroll and materials due to plant closures, as previously discussed.the closure of Units 1 and 2 at Heskett Station.
Decreased contract services of $500,000, primarily lower transmission expense offset in part by higher Big Stone Station costs.
Partially offset by increased contract service costs including transmission engineering costs as well as maintenance costs at Coyote Stationof $400,000 for vehicles and Wygen III.equipment.
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Depreciation, depletion and amortization increased $800,000, primarily due to:decreased $1.3 million.
IncreasedPrimarily due to decreased amortization of plant retirement and closure costs of $1.5 million resulting from an extension to the recovery period for these costs, which are recovered in operating revenues, as discussed in Note 13.12.
IncreasedPartially offset by increased property, plant and equipment balances, primarily as a result of transmission projects placed in service largely related to growthimprove reliability and replacement projects.update aging infrastructure.
Taxes, other than income were comparable to the same period in the prior year.
Other income (expense) decreased $800,000.
Largely lowerincreased $1.5 million, primarily resulting from higher returns on certain of the Company's nonqualified benefit plan investments of $1.2 million.
Partially$1.9 million, as discussed in Note 14, offset in part by higherthe absence of AFUDC largelyequity due to higher rates.average short-term debt balance.
Interest expense increased $600,000,decreased $300,000 as a result of higher AFUDC debt, largely resulting fromdue to higher long-termrates, partially offset by higher average interest rates and debt balances from debt issued in 2021.balances.
Income tax benefit increased $800,000.
Largelydecreased $2.5 million, largely due to higher income before income taxes and lower production tax credits of $1.1 million$800,000 driven by higherlower wind production.
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IndexPartially offset by lower permanent tax adjustments and excess deferred tax amortization.
Earnings overview - The following information summarizes the performance of the natural gas distribution segment.
Three Months EndedThree Months Ended
March 31,March 31,
2022 2021 Variance 2023 2022 Variance
(In millions)(In millions)
Operating revenuesOperating revenues$450.6 $350.4 29 %Operating revenues$565.7 $450.6 26 %
Operating expenses:Operating expenses: Operating expenses: 
Purchased natural gas soldPurchased natural gas sold293.3 202.2 45 %Purchased natural gas sold397.3 293.3 35 %
Operation and maintenanceOperation and maintenance54.1 51.2 %Operation and maintenance57.2 54.1 %
Depreciation, depletion and amortizationDepreciation, depletion and amortization22.2 22.5 (1)%Depreciation, depletion and amortization23.2 22.2 %
Taxes, other than incomeTaxes, other than income24.7 20.9 18 %Taxes, other than income29.5 24.7 19 %
Total operating expensesTotal operating expenses394.3 296.8 33 %Total operating expenses507.2 394.3 29 %
Operating incomeOperating income56.3 53.6 %Operating income58.5 56.3 %
Other income (expense)Other income (expense)(.4)1.7 (124)%Other income (expense)4.9 (.4)1325 %
Interest expenseInterest expense9.5 9.2 %Interest expense14.1 9.5 48 %
Income before income taxesIncome before income taxes46.4 46.1 %Income before income taxes49.3 46.4 %
Income tax expenseIncome tax expense10.1 9.9 %Income tax expense10.4 10.1 %
Net incomeNet income$36.3 $36.2 — %Net income$38.9 $36.3 %
Operating statisticsThree Months Ended
March 31,
2022 2021 
Revenues (millions)
Retail sales:
Residential$258.6 $203.9 
Commercial162.7 120.6 
Industrial13.0 8.9 
434.3 333.4 
Transportation and other16.3 17.0 
$450.6 $350.4 
Volumes (MMdk)
Retail sales:
Residential31.0 28.8 
Commercial20.5 18.6 
Industrial1.8 1.5 
53.3 48.9 
Transportation sales:
Commercial.7 .7 
Industrial41.0 43.9 
41.7 44.6 
Total throughput95.0 93.5 
Average cost of natural gas per dk$5.50 $4.13 
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Operating statisticsThree Months Ended
March 31,
2023 2022 
Revenues (millions)
Retail sales:
Residential$325.3 $258.6 
Commercial202.9 162.7 
Industrial16.7 13.0 
544.9 434.3 
Transportation and other20.8 16.3 
$565.7 $450.6 
Volumes (MMdk)
Retail sales:
Residential32.3 31.0 
Commercial21.4 20.5 
Industrial1.9 1.8 
55.6 53.3 
Transportation sales:
Commercial.7 .7 
Industrial48.8 41.0 
49.5 41.7 
Total throughput105.1 95.0 
Average cost of natural gas per dk$7.15 $5.50 
Three Months Ended March 31, 2022,2023, Compared to Three Months Ended March 31, 20212022 Natural gas distribution's earnings increased $100,000$2.6 million as a result of:
Operating revenuesRevenue increased $100.2$115.1 million, largely resulting from:
Higher purchased natural gas sold of $104.0 million recovered in customer rates that was offset in expense, as described below.below, partially offset by $2.0 million of natural gas cost sharing in Oregon.
Higher retail sales volumes of approximately 9.0 percent across all customer classes, partially offset by weather normalization and decoupling mechanisms in certain jurisdictions.
HigherIncreased revenue-based taxes recovered in rates of $3.8$4.6 million that were offset in expense, as described below.
Approved rate relief in certain jurisdictionsWashington of $1.2$3.7 million, which includes the excess deferred income tax tariff settlement of $1.1 million, as well as higher cost recoverydiscussed in Note 19.
A 4.2 percent increase in retail sales volumes to all customer classes due to colder weather, partially offset by weather normalization and trackerdecoupling mechanisms of $1.0 million.$2.1 million in certain jurisdictions.
Purchased natural gas sold increased $91.1$104.0 million, primarily due to:
Higherto higher natural gas costs of $91.7 million as a result of higher market prices.
Higherprices, including the higher recovery of purchased gas adjustmentsadjustments. Purchased natural gas sold was also impacted by higher volumes of $30.0natural gas purchased of $12.3 million relateddue to the February 2021 cold weather event and the 2018 Enbridge pipeline rupture.increased retail sales volumes.
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Operation and maintenance increased $2.9 million, due to:$3.1 million.
Increased contract services of $1.3 million, primarily higher subcontractor costs.Largely resulting from:
Higher payroll-related costs of $2.4 million, primarily higher straight time costs of $1.6 million and higher health care costs.
Higher costs of $1.0 million largely higher straight-time payroll.
Higher software costs.associated with vehicles and equipment.
Depreciation, depletion and amortization was comparable to the same periodincreased $1.0 million, primarily resulting from growth and replacement projects placed in the prior year.service, partially offset by lower depreciation rates in certain jurisdictions.
Taxes, other than income increased $3.8$4.8 million, resultinglargely from higher revenue-based taxes beingwhich are recovered in rates.
Other income (expense) decreased $2.1increased $5.3 million as a resultdriven by higher interest income of lower$2.9 million, largely related to higher purchased gas costs, and higher returns on certain of the Company's nonqualified benefit plan investments.plans of $2.8 million. These increases were offset in part by higher pension and postretirement expense.
Interest expense was comparableincreased $4.6 million, primarily from higher short-term and long-term debt balances from debt issued in 2023 and 2022 and higher interest rates, partially offset by higher AFUDC debt of $800,000 due to the same period in the prior year.higher rates.
Income tax expense was comparable to the same period in the prior year.
Outlook TheIn 2022, the Company experienced rate base growth of 7.8 percent and expects these segments will grow rate base by approximately 56 percent to 7 percent annually over the next five years on a compound basis. Operations are spread across eight states where the Company expects customer growth to be higher than the national average. In 2021,2022, these segments experienced retail customer growth of approximately 1.71.6 percent and the Company expects customer growth to continue to average 1 percent to 2 percent per year. This customer growth, along with system upgrades and replacements needed to supply safe and reliable service, will require investments in new and replacement electric and natural gas systems.
These segments are exposed to energy price volatility and may be impacted by changes in oil and natural gas exploration and production activity. Rate schedules in the jurisdictions in which the Company's natural gas distribution segment operates contain clauses that permit the Company to file for rate adjustments for changes in the cost of purchased natural gas. Although changes in the price of natural gas are passed through to customers and have minimal impact on the Company's earnings, the natural gas distribution segment's customers benefit from lower natural gas prices through the Company's utilization of storage and fixed price contracts. During the last half of 2021 and the first quarter ofIn 2022, the Company experienced increased natural gas prices across its service areas, and expects this trendin January 2023, experienced higher natural gas prices in the Pacific Northwest, as previously discussed in Strategy and Challenges. As a result, the Company has filed an out-of-cycle cost of gas adjustment in Idaho to continue throughassist in the next winter heating season due to the increase in demand outpacing the supply along with the impacttimely recovery of global events.these costs. The Company will continue to monitor natural gas prices, as well as oil and natural gas production levels.
In February 2019,May 2022 the Company announced the retirement of three aging coal-fired electric generating units, resulting from the Company's analysis showing that the plants are no longer expected to be cost competitive for customers. The Company ceased operations of Unit 1 at Lewis & Clark Station in Sidney, Montana, in March 2021 and Units 1 and 2 at Heskett Station near Mandan, North Dakota, in February 2022. In addition, the Company will beginbegan construction of Heskett Unit 4, an 88-MW simple-cycle natural gas-fired combustion turbine peaking unit at the existing Heskett Station near Mandan, North Dakota, in the second quarter of 2022 with an expected in service date in the first halfsummer of 2023.
The Company is one of four owners of Coyote Station and cannot make a unilateral decision on the plant's future; therefore, the Company could be negatively impacted by decisions of the other owners. StateIn September 2021, Otter Tail Power Company filed its 2022 Integrated Resource Plan in Minnesota and North Dakota, which included its intent to start the process of withdrawal from its 35 percent ownership interest in Coyote Station with an anticipated exit from the plant by December 21, 2028. In March 2023, Otter Tail Power Company filed its 2023 Integrated Resource Plan, which differs from the 2022 filing by supporting retention of Coyote Station in its generation portfolio as long as it is not required to make major capital investments in the plant. Otter Tail Power Company maintains that continuous operation of the facility would be beneficial in meeting MISO's new minimum capacity planning requirements, the Minnesota Clean Energy Law and other statutes and regulations. The joint owners continue to collaborate in analyzing data and weighing decisions that impact the plant and its employees as well as each company's customers and communities served. Further state implementation of pollution control plans to improve visibility at Class I areas, such as national parks, under the EPA's Regional Haze Rule could require the owners of Coyote Station to incur significant new costs. If the owners decide to incur such costs, the costs could, dependent on determination by state regulatory commissions on approval to recover such costs from customers, negatively impact the Company's results of operations, financial position and cash flows. The NDDEQ submitted a draftits state implementation plan to the EPA in August 2022 and federal land managers ofexpects a decision on the National Park Service, the United States Fish and Wildlife Service and the United States Forest Service for consultation, and the federal land managers haveplan sometime in 2023. The plan, as submitted comments back toby the NDDEQ, for review. North Dakota determined it is not reasonable to require controls during this planning period. The emissions modeling conducted for the combined western state agencies affected by the Regional Haze Rule was delayed and has subsequently delayed the NDDEQ state implementation plan process. The NDDEQ state implementation plan is open for public comment from April 20, 2022 through June 1, 2022, and, as currently drafted, does not require additional controls for any units in North Dakota, including Coyote Station. Therefore,
The labor contract at Intermountain with the NDDEQ's state
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implementation plan, which was due to the EPA by July 2021, is anticipated to be submitted to the EPAUA, as reported in Items 1 and 2 - Business Properties - General in the summer of 2022. Additionally, in September 2021, Otter Tail Power Company filed its 2022 Integrated Resource Plan in MinnesotaAnnual Report, has been ratified and North Dakota which included its intent to start the process of withdrawal from its 35 percent ownership interest in Coyote Station with an anticipated exit from the plant by Decemberis effective through March 31, 2028. The joint owners continue to collaborate in analyzing data and weighing decisions that impact the plant and its employees as well as each company's customers and communities served.
On April 22, 2022 through April 24, 2022, a major snow and ice storm in northwest North Dakota caused widespread power outages and significant damage to the Company's electric transmission and distribution system. The Company is working on repairing the damages. Although total storm costs are not yet finalized, anticipated impacts to the financial statements are not expected to be material.2027.
Legislation and rulemaking The Company continues to monitor legislation and rulemaking related to clean energy standards that may impact its segments. Below are some of the specific legislative actions the Company is monitoring.
The current presidential administration is considering changes to the federal Clean Air Act, some of which were amended by the previous presidential administration. The content and impacts of the changes under consideration are uncertain and the Company continues to monitor for potential actions by the EPA.
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In Oregon, the Climate Protection Program Rule was approved in December 2021, which requires natural gas companies to reduce GHG emissions 50 percent below the baseline by 2035 and 90 percent below the baseline by 2050, which may2050. Each year, compliance instruments will be achieveddistributed to the Company by the Oregon Department of Environmental Quality at no cost and will decline annually in step with the reductions from baseline. The Company intends to meet its obligations through surrendering no cost emissions allowances and will fill remaining compliance obligations by investing in additional customer conservation and energy efficiency programs, purchasing community climate investment credits, and purchasing low carbon fuels such as renewable natural gas. The Company expects the compliance costs for these regulations to be recovered through customer rates. Due to timing of regulatory recovery, future compliance obligation purchases could impact the Company's operating cash flow. For more information about this rule and associated compliance costs, see Items 1 and 2 - Business Properties in the 2022 Annual Report. Cascade's draft 2023 Oregon integrated resource plan projects customer bills could increase substantially compared to costs included in customers' current bills as a result of the legislation. Projected customer bill impacts are estimates, subject to change as legislation is implemented and compliance begins, as well as, numerous assumptions used in the complex analysis of integrated resource planning. On September 30, 2022, the Company filed a request for the use of deferred accounting for costs related to the rule and began deferring those costs. The Company, along with the other two local natural gas distribution companies in Oregon, filed a lawsuit on March 18, 2022, challenging the Climate Protection Program Rule. The lawsuit was filed on behalf of customers as the Company does not believe the rule accomplishes environmental stewardship in the most effective and affordable way possible.
In Washington, the Climate Commitment Act signed into law in May 2021 requires natural gas distribution companies to reduce overall GHG emissions 45 percent below 1990 levels by 2030, 70 percent below 1990 levels by 2040 and 95 percent below 1990 levels by 2050,2050. As directed by the Climate Commitment Act, in September 2022 the Washington DOE published its final rule on the Climate Commitment Program, which was effective on October 30, 2022, and emissions compliance began on January 1, 2023. The Company must demonstrate that they have met GHG emissions reduction goals through a combination of on-site emissions reductions and the use of approved allowances and offsets. Emissions compliance may be achieved through increased energy efficiency and conservation measures, purchased emission allowances and offsets, and purchases of low carbon fuels. As directedEmissions allowances are allocated by the Climate Commitment Act, the Washington DOE has begunto the Climate Commitment Program rule-making processCompany at no cost and is expectedadditional allowances are required to publish a final rule in the fall of 2022.be purchased at auction. Auctions for allowances are held quarterly. The Company has begun reviewingintends to meet the first compliance options andperiod requirements, in part, by purchasing allowances through auction. The Company expects the compliance costs for these regulations will be recovered through customer rates. Due to timing of regulatory recovery, the purchase of allowances could impact the Company's operating cash flow. For more information about this rule and associated compliance costs, see Items 1 and 2 - Business properties in the 2022 Annual Report. Cascade's 2023 Washington integrated resource plan projects customer bills could increase substantially compared to costs included in customers' current bills as a result of the legislation. Projected customer bill impacts are estimates, subject to change as the legislation is implemented and compliance begins, as well as, numerous assumptions used in the complex analysis of integrated resource planning. On October 14, 2022, the Company filed a request for the use of deferred accounting for costs related to the rule and began deferring those costs. The WUTC approved the deferred accounting order on February 28, 2023.
On April 22, 2022, the Washington State Building Code Council approved revisions to the state's commercial energy code that will significantly limit the use of natural gas for space and water heating in new and retrofitted commercial and multifamily buildings and proposed the review of similar restrictions in the future for residential buildings. On November 4, 2022, the Washington State Building Code Council adopted new residential codes requiring gas or electric heat pumps for most new space and water heating installations. The Company is currently assessingcontinues to assess the impact of these revisions.
The Company has reviewed the income tax provisions of the IRA signed into law in August 2022, and the Company will continue to evaluate whether any of the new or renewed energy tax credits will provide a benefit.
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Pipeline
Strategy and challenges The pipeline segment provides natural gas transportation, underground storage and energy-relatednon-regulated cathodic protection services, as discussed in Note 17. The segment focuses on utilizing its extensive expertise in the design, construction and operation of energy infrastructure and related services to increase market share and profitability through optimization of existing operations, organic growth and investments in energy-related assets within or in close proximity to its current operating areas. The segment focuses on the continual safety and reliability of its systems, which entails building, operating and maintaining safe natural gas pipelines and facilities. The segment continues to evaluate growth opportunities including the expansion of natural gas facilities; incremental pipeline projects; and expansion of energy-related services leveraging on its core competencies. In support of this strategy, the Company completed the following organic growth projects in 2022:
In February 2022, the North Bakken Expansion project in western North Dakota was placed in service in February of 2022.service. The project has capacity to transport 250 MMcf of natural gas per day and can be increased to 625 MMcf per day with additional compression.
In August 2022, the Line Section 7 Expansion project was placed in service and increased system capacity by 6.7 MMcf per day.
The segment is exposed to energy price volatility which is impacted by the fluctuations in pricing, production and basis differentials of the energy market's commodities. Legislative and regulatory initiatives on increased pipeline safety regulations and environmental matters such as the reduction of methane emissions could also impact the price and demand for natural gas.
The pipeline segment is subject to extensive regulation related to certain operational and environmental compliance, cybersecurity, permit terms and system integrity. The Company continues to actively evaluate cybersecurity processes and procedures, including changes in the industry's cybersecurity regulations, for opportunities to further strengthen its cybersecurity protections. Implementation of enhancements and additional requirements is ongoing. The segment reviews and secures existing permits and easements, as well as new permits and easements as necessary, to meet current demand and future growth opportunities on an ongoing basis. Groups opposing natural gas pipelines could also cause negative impacts
The Company has continued to actively manage the national supply chain challenges being faced by working with its manufacturers and suppliers to help mitigate some of these risks on the segment with increased costs, potential delays to project completion or cancellation of prospective projects.
its business. The segment regularly experiences extended lead times on raw materials that are critical to the segment's construction and maintenance work. In addition, the segment is currently experiencing increased fuel and raw material costs, as well as other inflationary pressures. Long lead times on materialswork which could delay maintenance work and construction projects potentially causing lost revenues and/or increased costs. Current national supply chain challenges and inflationary costs have not been impactful to the procurement of necessary materials at the pipeline segment, however, theThe Company is actively monitoringpartially mitigating these situations,
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including longer than normalchallenges by planning for extended lead times for certain items, and workingfurther in advance. The segment is also currently experiencing inflationary pressures with its manufacturers and suppliers to help mitigate these risks.increased raw material costs. The Company expects supply chain challenges and inflationary pressures to continue throughout the remainder of 2022.in 2023.
The segment focuses on the recruitment and retention of a skilled workforce to remain competitive and provide services to its customers. The industry in which it operates relies on a skilled workforce to construct energy infrastructure and operate existing infrastructure in a safe manner. A shortage of skilled personnel can create a competitive labor market which could increase costs incurred by the segment. Competition from other pipeline companies can also have a negative impact on the segment.
Earnings overview - The following information summarizes the performance of the pipeline segment.
Three Months EndedThree Months Ended
March 31,March 31,
2022 2021 Variance 2023 2022 Variance
(In millions) (In millions)
Operating revenuesOperating revenues$37.1 $36.1 %Operating revenues$40.8 $37.1 10 %
Operating expenses:Operating expenses:Operating expenses:
Operation and maintenanceOperation and maintenance15.4 15.1 %Operation and maintenance17.5 15.4 14 %
Depreciation, depletion and amortizationDepreciation, depletion and amortization6.3 5.2 21 %Depreciation, depletion and amortization6.9 6.3 10 %
Taxes, other than incomeTaxes, other than income3.5 3.3 %Taxes, other than income3.3 3.5 (6)%
Total operating expensesTotal operating expenses25.2 23.6 %Total operating expenses27.7 25.2 10 %
Operating incomeOperating income11.9 12.5 (5)%Operating income13.1 11.9 10 %
Other incomeOther income.1 .9 (89)%Other income.7 .1 600 %
Interest expenseInterest expense2.5 2.0 25 %Interest expense3.3 2.5 32 %
Income before income taxesIncome before income taxes9.5 11.4 (17)%Income before income taxes10.5 9.5 11 %
Income tax expenseIncome tax expense2.2 2.5 (12)%Income tax expense2.2 2.2 — %
Net incomeNet income$7.3 $8.9 (18)%Net income$8.3 $7.3 13 %
Operating statisticsThree Months Ended
March 31,
2022 2021 
Transportation volumes (MMdk)110.5 110.8 
Customer natural gas storage balance (MMdk):
Beginning of period23.0 25.5 
Net withdrawal(20.2)(20.3)
End of period2.8 5.2 
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Operating statisticsThree Months Ended
March 31,
2023 2022 
Transportation volumes (MMdk)129.7 110.5 
Customer natural gas storage balance (MMdk):
Beginning of period21.2 23.0 
Net withdrawal(12.2)(20.2)
End of period9.0 2.8 
Three Months Ended March 31, 2022,2023, Compared to Three Months Ended March 31, 20212022 Pipeline earnings decreased $1.6increased $1.0 million as a result of:
Revenues increased $1.0 million.
Driven$3.7 million, primarily driven by increased transportation revenues of $2.7 million,volumes, largely due to the demand associated witha full first quarter of benefit from the North Bakken Expansion project that was placed in service in February 2022.
Partially offset by lower non-regulated project2022, as well as increased contracted volume commitments beginning in February 2023. The Company also benefited from slightly higher storage-related revenues, and lower storage-related revenues.partially offsetting these increases were non-renewal of certain contracts.
Operation and maintenance was comparable to the same period in the prior year. increased $2.1 million.
Primarily from:
Higher payroll-related costs softwareof $800,000.
Higher legal costs of $500,000, largely due to the pending rate case.
Higher other costs, including materials and contract services were largely offset by lower non-regulated project costs.services.
Depreciation, depletion and amortization increased $1.1 million$600,000 due to increased property, plant and equipment balances, largely related to the North Bakken Expansion project.project in service for the full quarter, as previously discussed.
Taxes, other than income were comparable to the same period in the prior year.
Other income decreased $800,000, largely due toincreased $600,000, driven primarily by higher returns of $1.0 million on the Company's nonqualified benefit plan investments, partially offset by lower returns on certainAFUDC as a result of the Company's benefit plan investments.completion of the North Bakken Expansion project placed in service in February 2022.
Interest expense increased $500,000,$800,000, primarily due tofrom higher average interest rates and higher debt balances.balances to fund capital expenditures.
Income tax expense was comparable to the same period in the prior year.
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Outlook On February 18, 2022,The Company continues to monitor and assess the FERC issuedpotential impacts of two policy statements regarding the certification of new interstate natural gas facilities. The two policy statements were subsequently converted toFERC draft policy statements byissued in the FERC on March 24,first quarter of 2022. The first draft policy statement,One is the Updated Certificate of Policy Statement, which describes how the FERC will determine whether a new interstate natural gas transportation project is required by public convenience and necessity. It includes increased focus on a project's purpose and need and the environmental impacts; as well as impacts on landowners and environmental justice communities. The FERC also clarified the updated policy statement will not apply to projects that have been filed with the FERC prior to the policy statement being finalized. The second draft policy statement, the Interim GHG Policy Statement, explains how the FERC will assess the impacts of natural gas infrastructure projects on climate change in its reviews under the National Environmental Policy Act and Natural Gas Act.
The FERC invited public comment onCompany continues to monitor, evaluate and implement additional GHG emissions reduction strategies, including increased monitoring frequency and emission source control technologies to minimize potential risk.
The EPA recently proposed additional rules to update, strengthen and expand standards intended to significantly reduce GHG emissions and other air pollutants from the draft policy statements which were due April 25, 2022.oil and natural gas industries. The standards will apply to natural gas compressors, pneumatic controllers and pumps, fugitive emissions components and super-emitter events. The EPA projects the final rules will be issued in August 2023. Additionally, the EPA anticipates revising the current GHG reporting rules to incorporate provisions in the IRA. These revisions are anticipated to be issued later this year. The Company continues to monitor and assess these initiativesthe proposed rules and the potential impacts they may have on its business processes, current and future projects, results of operations and disclosures.
The Company has continued to experience the effect of associated natural gas production in the Bakken, which has provided opportunities for organic growth projects and increased demand. The completion of organic growth projects has contributed to higher volumes of natural gas the Company transports through its system. Increased oil prices have allowed producers to bring wells back online and support new drilling. As a result, associatedAssociated natural gas production in the Bakken fell during the COVID-19 pandemic delaying previously forecasted production growth. Natural gas production has returnedrebounded to near pre-pandemic levels and isdrilling rig activities have increased, and the Company expects continued gradual increases over the next 2 years. The production delay, along with long-term contractual commitments on the North Bakken Expansion project placed in service in February 2022, has negatively impacted customer renewals of certain contracts. Bakken natural gas production outlook remains positive with continued growth expected to continue to grow due to new oil wells and increasing gas to oil ratios.
The low levels of
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Increases in national and global natural gas in storage nationally, along with global events,supply has put upwardmoderated pressure on natural gas prices and increasedprice volatility. While the Company believes there will continue to be varying pressures on natural gas production levels and prices, the long-term outlook for natural gas prices continues to provide growth opportunity for industrial supply relatedsupply-related projects and seasonal pricing differentials provide opportunities for natural gas storage services.
The Company continues to focus on growth and improving existing operations and growth opportunities through organic projects in all areas in which it operates, which includes additional organic growth projects with local distribution companies, Bakken area producers and industrial customers in various stages of development.
In July 2021, the Company announced plans for a natural gas pipeline expansion project in eastern North Dakota. The Wahpeton Expansion project consists of approximately 60 miles of pipe and ancillary facilities and is designed to increase capacity by 20 MMcf per day, which is supported by long-term customer agreements with Montana-Dakota and its utility customers. Construction is expected to begin in early 2024, depending on regulatory approvals, with an anticipated completion date later in 2024. On May 27, 2022, the Company filed with FERC its application for the project and received FERC's final environmental impact statement in April 2023.
On September 22, 2021,19, 2022, the Company filed with the FERC its prior notice application for its 2023 Line Section 27 Expansion project. This project consists of a requestnew compressor station and ancillary facilities and is designed to initiate the pre-filing review process and received FERC approval of the pre-filing request on September 27, 2021.
The Company has also entered intoincrease capacity by 175 MMcf per day, which is supported by a long-term customer agreements for the construction of four additional growth projects, three of which are still dependent on regulatory approvals. Estimated capital expenditures for these projectsagreement. Construction is approximately $108 million and is includedexpected to begin in the pipeline segment's estimated capital expendituressecond quarter of 2023 with an anticipated completion date in late 2023.
On December 22, 2022, the Company filed with the FERC its prior notice application for 2022its Grasslands South Expansion project. This project consists of approximately 15 miles of pipe in western North Dakota, utilizing existing capacity on its Grasslands Subsystem to a new connection with Big Horn Gas Gathering, LLC in northeastern Wyoming and 2023. The projects are anticipated to be completedancillary facilities in 2022North Dakota and 2023 and will addWyoming. A long-term customer agreement supports a design for incremental system capacity of over 30094 MMcf per day. Construction is expected to begin in the second quarter of 2023 with an anticipated completion date in late 2023.
On March 6, 2023, the Company filed with the FERC its prior notice application for its Line Section 15 Expansion project. Long-term customer agreements support a design for incremental capacity of 25 MMcf per day. This project consists of additional compression, uprating operational pressure of approximately 23 miles of pipe in western South Dakota and additional ancillary facilities. Construction is expected to begin in the second quarter of 2023, pending regulatory approvals, with an anticipated completion date in late 2023.
See Capital Expenditures within this section for information on the expenditures related to these growth projects.
Construction Materials and Contracting
Strategy and challenges The segment is a leading aggregates-based construction materials and contracting segment provides an integrated set of aggregate-based construction services,service provider in the United States, as discussed in Note 17. The segment focuses on continued growth and maximizing its vertical integration, leveraging its core values to be a supplier of choice in all its markets. The segment is also focused on its commitment to its stakeholders by operating with integrity and always striving for excellence; development and recruitment of talented employees; sustainable practices to create value for the communities it serves; being the provider of choice in midsize, high-growth strategic markets located near major transportation corridors and desirable mid-sized metropolitan areas;markets; strengthening the long-term, strategic aggregate reserve position through available purchase and/or lease opportunities;opportunities in existing and new geographies; and enhancing profitability through cost containment, margin disciplineits supply chain to provide reliable, timely and vertical integrationefficient services to its end customers. As previously discussed, the Company is pursuing a tax-free spinoff of the segment's operations; developmentconstruction materials and recruitmentcontracting segment, and the separation is expected to be completed in May of talented employees; and continued growth through organic and strategic acquisition opportunities.2023.
A key element of the Company's long-term strategy for this businessThe segment is to further expand its market presence in the higher-margin materials business (rock, sand, gravel, asphalt oil, asphalt concrete, ready-mix concrete and related products), complementing and expanding on the segment's expertise. The Company's continued acquisition activity supports this strategy.
As one of the country's largestleading producers of crushed stone and sand and gravel, producers, the segmentand continues to strategically manage its aggregate reserves, as well as take further advantage of being vertically integrated. The segment's vertical integration allows it to manage operations from aggregate mining to final lay-down of concrete and asphalt, with control of and access to permitted aggregate reserves being significant. The Company's aggregate reserves are naturally declining and as a result, the Company seeks permit expansion and acquisition opportunities to replace the reserves.
The construction materialssegment's management continually monitors its margins and contracting segment faces challenges that are not underhas been proactive in applying strategies to address the direct controlinflationary impacts seen across the United States. The Company has increased its product pricing and continues to implement cost savings initiatives to mitigate these effects on the segment's gross margin. Due to existing contractual provisions, there can be a lag between the announced price increases and the time when they can be fully recognized. The Company will continue to evaluate further price increases on a regular cadence in an attempt to stay ahead of the business. inflationary pressures and enhance stockholder value.
The segment operates in geographically diverse and highly competitive markets. Competitionmarkets yet strives to maximize efficiencies, including transportation costs and economies of scale, to maintain strong margins. The segment's margins can putexperience negative pressure onfrom competition, as well as impacts of the segment's operating margins. The segment is also subject to volatility including recent inflationary pressures, in the cost of raw materials such as diesel fuel, gasoline, asphalt oil, cement and steel.steel, with fuel and asphalt oil costs having the most significant impact on the segment's results. Such volatility canand inflationary pressures may continue to have an impact on the segment's margins, including fixed-price construction contracts that are particularly
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vulnerable to the volatility of energy and material prices. TheThese increases are partially offset by mitigation measures implemented by the Company, including price increases, escalation clauses in contracting services contracts, pre-purchased materials and other cost savings initiatives. While the Company has increased product pricing where necessaryexperienced some supply chain constraints, it continues to mitigate the effectshave good relationships with its suppliers and has not experienced any material adverse impacts of recent inflationary costs and will continue to evaluate future increases. The Company expects inflationary pressures to continue throughout the remainder of 2022.shortages or delays on materials. Other
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variables that can impact the segment's margins include adverse weather conditions, the timing of project starts or completioncompletions and declines or delays in new and existing projects due to the cyclical nature of the construction industry and governmental infrastructure spending. Accordingly, operating results in any particular period may not be indicative of the results that can be expected for any other period.
The segmentsegment's operations can also faces challengesbe significantly impacted by favorable and unfavorable weather conditions. Unseasonably wet and/or cold weather in the states it operates in can delay the start to construction season or cause temporary delays on specific projects, while unseasonably dry or warm weather in the states it operates in can allow for an early start to the construction season or allow for early completions on specific projects. Either of these conditions can impact both its construction materials sales and contracting services revenues. In early 2023, the western part of the United States had near record levels of precipitation, which impacted the segment's results. Other variables that can impact the segment’s margins include the timing of project starts or completions, and declines or delays in new and existing projects due to the cyclical nature of the construction industry. Accordingly, operating results in any particular period may not be indicative of the results that can be expected for any other period.
As a people first company, the segment continually takes steps to address the challenge of recruitment and retention of employees. In order to help attract new workers to the construction industry and enhance the skills of its current employees, the Company has constructed and operates a corporate-wide state-of-the-art training facility located in the Pacific Northwest. The training facility offers hands-on training for heavy equipment operators and truck drivers, as well as leadership and safety training. Trends in the labor market include an aging workforce and labor availability issues. In 2021issues, and the first quarter of 2022, most of the markets the segment operates in saw an increase inhave experienced labor shortages, largely truck drivers, causing increased labor-related costs and delays or inefficiencies on projects. The new training facility is expected to help address some of these challenges. The Company continues to monitor the labor markets and assess additional opportunities to enhance and support its workforce. Despite these efforts, the Company expects labor costs to continue to increase based on the increased demand for services and, to a lesser extent, the recent escalated inflationary environment in the United States. The increase in labor shortages also impacts the segment's ability to recruit and train a skilled workforce to meet the needs of increasing demand and seasonal work. In order to help attract new workers to the construction industry and enhance the skills of its current employees, the Company has completed a training facility in Oregon. The training facility offers hands-on training for heavy equipment operators and truck drivers, as well as leadership and safety training.
Earnings overview - The following information summarizes the performance of the construction materials and contracting segment.
Three Months EndedThree Months Ended
March 31,March 31,
2022 2021 Variance 2023 2022 Variance
(In millions) (In millions)
Operating revenuesOperating revenues$310.0 $265.7 17 %Operating revenues$307.9 $310.0 (1)%
Cost of sales:Cost of sales:Cost of sales:
Operation and maintenanceOperation and maintenance287.0 243.2 18 %Operation and maintenance265.8 271.6 (2)%
Depreciation, depletion and amortizationDepreciation, depletion and amortization27.3 22.3 22 %Depreciation, depletion and amortization28.4 27.3 %
Taxes, other than incomeTaxes, other than income10.9 9.8 11 %Taxes, other than income9.6 10.0 (4)%
Total cost of salesTotal cost of sales325.2 275.3 18 %Total cost of sales303.8 308.9 (2)%
Gross margin(15.2)(9.6)(58)%
Gross profitGross profit4.1 1.1 273 %
Selling, general and administrative expense:Selling, general and administrative expense:Selling, general and administrative expense:
Operation and maintenanceOperation and maintenance25.3 21.7 17 %Operation and maintenance43.6 40.7 %
Depreciation, depletion and amortizationDepreciation, depletion and amortization1.1 1.1 — %Depreciation, depletion and amortization1.2 1.1 %
Taxes, other than incomeTaxes, other than income3.0 2.5 20 %Taxes, other than income3.9 3.9 — %
Total selling, general and administrative expenseTotal selling, general and administrative expense29.4 25.3 16 %Total selling, general and administrative expense48.7 45.7 %
Operating lossOperating loss(44.6)(34.9)28 %Operating loss(44.6)(44.6)— %
Other expense(2.0)(.1)NM
Other income (expense)Other income (expense).9 (2.0)145 %
Interest expenseInterest expense5.2 4.7 11 %Interest expense9.5 5.2 83 %
Loss before income taxesLoss before income taxes(51.8)(39.7)30 %Loss before income taxes(53.2)(51.8)%
Income tax benefitIncome tax benefit(11.8)(8.9)33 %Income tax benefit(11.9)(11.8)%
Net lossNet loss$(40.0)$(30.8)30 %Net loss$(41.3)$(40.0)%
*NM - not meaningfulThe Company identified certain costs that were reclassified from cost of sales to selling, general and administrative expense of $16.3 million for the three months ended March, 31, 2022. The reclassification had no impact to net income.
Operating statisticsRevenuesGross margin
Three Months EndedThree Months Ended
March 31,March 31,
2022 2021 2022 2021 
(In millions)
Aggregates$77.6 $70.4 $(2.8)$(2.7)
Asphalt18.1 14.3 (6.1)(4.8)
Ready-mix concrete108.5 100.7 5.2 5.7 
Other products*37.5 31.0 (13.7)(11.7)
Contracting services114.3 96.0 2.2 3.9 
Intracompany eliminations(46.0)(46.7)— — 
$310.0 $265.7 $(15.2)$(9.6)
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Operating statisticsRevenuesGross profit
Three Months EndedThree Months Ended
March 31,March 31,
2023 2022 2023 2022 
(In millions)
Aggregates$83.5 $77.6 $2.3 $.4 
Ready-mix concrete96.8 108.5 8.8 9.3 
Asphalt13.6 18.1 (6.0)(5.2)
Other products*38.6 37.5 (6.3)(11.7)
Contracting services115.0 114.3 5.3 8.3 
Intracompany eliminations(39.6)(46.0)— — 
$307.9 $310.0 $4.1 $1.1 
*Other products includes cement, asphalt oil, merchandise, fabric and spreading and other products that individually are not considered to be a major line of business for the segment.
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Three Months Ended
March 31,
2023 2022 
Sales (thousands):
Aggregates (tons)4,868 4,970 
Ready-mix concrete (cubic yards)561 734 
Asphalt (tons)179 316 
Average selling price:
Aggregates (per ton)$17.16 $15.62 
Ready-mix concrete (per cubic yard)$172.64 $147.89 
Asphalt (per ton)$76.07 $57.21 

Index*Average selling price includes freight and delivery and other revenues.
Three Months Ended
March 31,
2022 2021 
Sales (thousands):
Aggregates (tons)4,970 4,808 
Asphalt (tons)316 294 
Ready-mix concrete (cubic yards)734 732 
Average sales price:
Aggregates (per ton)$15.62 $14.65 
Asphalt (per ton)$57.21 $48.45 
Ready-mix concrete (per cubic yard)$147.89 $137.57 
Three Months Ended March 31, 2022,2023, Compared to Three Months Ended March 31, 20212022 Construction materials and contracting's seasonal loss increased $9.2$1.3 million as a result of:
RevenuesRevenue increased $44.3decreased $2.1 million.
Primarily the result of:
Ready-mix sales volumes decreased $29.9 million, largely a result of unfavorable weather across most states of operation.
Asphalt sales volumes decreased $10.4 million, largely a result of unfavorable weather in the Pacific and Northwest states as well as the absence of impact projects and less available paving work in certain regions.
Aggregates sales volumes decreased $1.8 million, largely a result of unfavorable weather in the Pacific and North Central states, partially offset by higher volumes in certain regions due to demand by data center, commercial and residential customers.
Partially offset by:
Higher average saleselling prices across allmost product lines.lines of nearly $33.0 million, largely in response to inflationary pressures.
Contracting revenues increased slightly due to more available work in certain regions being mostly offset by delays in the Pacific states due to unfavorable weather.
Increased contracting revenues of $18.3Gross profit increased $3.0 million, due to favorable weather, timing of work and strong demand in some regions and revenue from companies acquired since the comparable period last year.
Higher ready-mix concrete revenues of $7.8 millionprimarily due to higher average saleselling prices across most product lines as previously mentioned, in all regions along with higher ready-mix volumes in Texas.
Higher aggregate sales volumes due to recent acquisitions and average sale prices,well as previously mentioned, contributed $5.9 million in Oregon. Also contributing were increased volumes associated with the startup of the Honey Creek quarry in Texas. These increases werecost savings initiatives, partially offset by the absence ofcement, labor, natural gas and diesel costs which increased year over year on a large projectcost-per-unit basis due to inflation. Gross profit was also impacted by unfavorable weather in South Dakota.certain regions, as previously discussed, resulting in less hours worked.
Gross margin decreased $5.6 million.
Primarily due to:
Higher operating costs across all product lines, including fuel costs of $5.0 million, repair and maintenance expenses, and labor-related costs.
Lower margins in other product lines, primarily due to higher fuel and repair and maintenance costs, as previously discussed.
Lower contracting services margins resulting from mix of work performed. These decreases were partially offset by favorable job performance in northern California.
Lower asphalt margins due to higher materials, repair and maintenance and productions costs, as previously mentioned, of $1.3 million, as well as lower ready-mix concrete margins due to less bad debt recovery.
Selling, general and administrative expense increased $4.1$3.0 million.
Largely due to:the result of:
Increased payroll-related costs of $1.7 million.$3.9 million higher, largely due to inflationary pressures, offset in part by decreased health care costs of $3.1 million resulting from a change in accounting election.
Increased office expensesprofessional services of $1.0 million.$900,000, primarily for one-time strategic initiative costs incurred in 2023.
Higher professional feesIncreased expected credit losses of $900,000.
Less recovery$700,000 associated with an increase in receivable balances over 90 days and absence of bad debt expense.recoveries in 2022.
Increased other costs related to corporate costs, insurance and safety training.
Offset in part by higher net gains on asset sales of $1.4 million.
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Other expenseincome (expense) increased $1.9$2.9 million primarily due to lowerhigher returns on the Company's nonqualified benefit plan investments.investments, as discussed in Note 14.
Interest expense increased $500,000, largely$4.3 million the result of higher debt balances due to recent acquisitions.average interest rates.
Income tax benefits increased $2.9 million, largely duebenefit was comparable to same period in the higher loss before income taxes.prior year.
Outlook In August 2022, the Company announced its intent to separate this segment into a standalone publicly traded company. The separation is expected to result in two independent, publicly traded companies: (1) MDU Resources Group, Inc., the existing company and (2) Knife River, a construction materials and contracting services company. The separation is expected to be completed in May of 2023 and is expected to unlock inherent value within the two companies, which each have unique growth prospects and investment opportunities. The Company may, at any time and for any reason until the proposed transaction is complete, abandon the separation or modify or change its terms. For a complete discussion of all the conditions to and the risk and uncertainties associated with the separation and distribution, see Part II, Item IA. Risk Factors in this quarterly report and Part I, Item 1A - Risk Factors in the 2022 Annual Report.
Funding for public projects is dependent on federal and state funding, such as appropriations to the Federal Highway Administration. The American Rescue Plan Act approved by the United States Congress and signed into law by the President of the United Statesenacted in the first quarter of 2021 provides $1.9 trillion in COVID-19 relief funding for states, schools and local governments. States are beginning to move forward with allocating these funds based on federal criteria and state needs, and in some cases, funding of infrastructure projects could positively impact the segment. Additionally, the bipartisan infrastructure proposal, known as the Infrastructure Investment and Jobs Act,IRA, was approved by the United States Congress and signed into law by the President of the United Statesenacted in the fourth quarter of 2021. This initiative2021 and is providing long-term opportunities by designating $119 billion for the repair and rebuilding of roads and bridges across the Company's footprint. In addition, the IRA provides $369 billion in new funding for clean energy programs. These programs include new tax incentives for solar, battery storage and hydrogen development along with funding to expand the production of electric vehicles and the build out of infrastructure to support electric vehicles. In addition to federal funding, 11 out of the 14 states in which the Company operates have implemented their own funding mechanisms for public projects, including projects related to highways, airports and other public infrastructure. The Company continues to monitor the implementationprogress of these legislative items.
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The segment's vertically integrated aggregate-basedaggregates-based business model provides the Company with the ability to capture margin throughout the sales delivery process. The aggregate products are sold internally and externally for use in other products such as ready-mix concrete, asphaltic concrete and public and private construction markets. The contracting services and construction materials are sold in connection with street, highway and other public infrastructure projects, as well as private commercial, industrial and residential development projects. The public infrastructure projects have traditionally been more stable markets as public funding is more secure during periods of economic decline. The public projects are, however, dependent on federal and state funding such as appropriations to the Federal Highway Administration. Spending on private development is highly dependent on both local and national economic cycles, providing additional sales during times of strong economic cycles.cycles and potential for reductions during recessionary periods.
During 2021,2022, the Company made strategic purchases and completed acquisitions that supportan acquisition in the Company's long-term strategy to expand its market presence.higher-margin materials markets. The Company continues to evaluate additional acquisition opportunities. For more information on the Company's business combinations, see Note 10.9. In 2022, the Company began upgrading its prestress facility located in Spokane, Washington. The state-of-the-art facility is expected to be completed during the first half of 2023. The facility is expected to be a platform for growth through improved productivity and quality, which will help meet strong market demand for prefabricated concrete solutions.
The construction materials and contracting segment's backlog remainedremains strong at March 31, 2022, at $940.1 million, as comparedit begins to enter its peak construction season. Contracting services backlog of $818.8was $958.5 million at March 31, 2021.2023, compared to contracting services backlog of $778.0 million at March 31, 2022. A significant portion of the Company's backlog at March 31, 2023, relates to publicly funded projects, largely street and highway construction.construction projects, which are primarily driven by public work projects for state departments of transportation. Period over period increases or decreases in backlog cannot be used as an indicator of future revenues or net income. TheWhile the Company expectsbelieves the current backlog of work remains firm, prolonged delays in the receipt of critical supplies and materials or continued increases to complete an estimated $886.5 million of backlog at March 31, 2022, during the next 12 months.pricing could result in customers seeking to delay or terminate existing or pending agreements. Factors noted in Part I, Item 1A. Risk Factors in the 20212022 Annual Report can cause revenues to be realized in periods and at levels that are different from originally projected.
The labor contracts that the construction materials and contracting services segment were negotiating at December 31, 2022, as reported in Items 1 and 2 - Business Properties - General in the 2022 Annual Report, have been ratified.
Construction Services
Strategy and challenges The construction services segment provides electrical and mechanical and transmission and distribution specialty contracting services, as discussed in Note 17. The construction services segment focuses on safely executing projects; providing a superior return on investment by building new and strengthening existing customer relationships; ensuring quality service; effectively controlling costs; retaining, developing and recruiting talented employees; growing through organic and strategic acquisition opportunities; and focusing efforts on projects that will permit higher margins while properly managing risk. The growth experienced by the segment in recent years is due in part to itsthe project awards in the markets served and the ability to support national customers in most of the regions in which it operates.
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The construction services segment faces challenges, which are not under direct control of the business, in the highly competitive markets in which it operates. Competitive pricing environments, project delays, changesoperates, including those described in management's estimates of variable considerationPart I, Item 1A. Risk Factors in the 2022 Annual Report. These factors, and the effects from restrictive regulatory requirementsthose noted below, have negatively impactedcaused fluctuations in revenues, gross margins and marginsearnings in the past and could affect revenues and marginsare likely to cause fluctuations in the future. Additionally,
Revenue mix and impact on margins. The mix of revenues based on the types of services the segment provides can impact margins as certain industries and services provide higher margin opportunities. Larger or more complex projects typically result in higher margin opportunities since the segment assumes a higher degree of performance risk and there is greater utilization of the segment's resources for longer construction timelines. However, larger or more complex projects can have a higher risk of regulatory and seasonal or cyclical delay. Project schedules fluctuate, which can affect the amount of work performed in a given period. Smaller or less complex projects typically have a greater number of companies competing for them, and competitors at times may be more aggressive when pursuing available work. A greater percentage of smaller scale or less complex work in a given period could negatively impactedimpact margins due to the inefficiency of transitioning between a greater number of smaller projects versus continuous production on a quarterly basisfew larger projects.
Project variability and performance. Margins for a single project may fluctuate period to period due to adversechanges in the volume or type of work performed, the pricing structure under the project contract or job productivity. Productivity and performance on a project can vary period to period based on a number of factors, including unexpected project difficulties; unexpected project site conditions; project location, including locations with challenging operating conditions or difficult geographic characteristics; whether the work is on an open or encumbered right of way; inclement weather conditions, as well as timingor severe weather events; environmental restrictions or regulatory delays; political or legal challenges related to a project; and the performance of third parties. In addition, the type of contract can impact the margin on a project. Under fixed-price contracts, which are more common with larger or more complex projects, the segment assumes risk related to project starts or completions; disruptions to the supply chain; declines or delays in newestimates versus execution. Revenues under this type of contract can vary, sometimes significantly, from original projects due to the cyclical nature of the construction industry; inflationary pressures;additional project complexity; timing uncertainty or extended bidding; extended regulatory or permitting processes; and other factors.factors, which can result in a reduction in profit or losses on a project.
Subcontractor work and provision of materials. Some work under project contracts is subcontracted out to other companies and margins on subcontractor work is generally lower than work performed by the Company. Increased subcontractor work in a given period may therefore result in lower margins. In addition, inflationary or other pressures may increase the cost of materials under fixed-price contracts and may result in decreased margins on the project. The Company has worked to implement provisions in project contracts to allow for the pass-through of inflationary costs to customers where feasible and will continue to do so to mitigate the impacts.
The segment's management continually monitors its operating margins and has been proactive in attempting to mitigate the inflationary impacts seen across the United States. The segment is currently experiencing increasedcontinued labor constraints and changing fuel and material costs, as well as impacts from delays in the national supply chain. The segment is working with suppliers and providers of goods and services in advance of construction to secure pricing and reduce delays for goods and services. The inflationary costs and national supply chain challenges experienced by the segment have increased costs but have not had significant impacts to the procurement of project materials. Such volatility and inflationary pressures may continue to have an impact on the segment's margins, including fixed-price construction contracts that are particularly vulnerable to the volatility of energy and material prices. These increases are partially offset by mitigation measures implemented by the Company, including escalation clauses in contracts, pre-purchased materials or project margins. However, theand other cost savings initiatives. The segment also continues recruitment and retention efforts to attract and retain employees. The Company expects these inflationary pressures and national supply chain challenges to continue throughout the remainder of 2022. The Company is actively monitoring these situations and working with its manufacturers, suppliers and customers to help mitigate these risks. These challenges may also impact the risk of loss on certain projects.continue. Accordingly, operating results in any particular period may not be indicative of the results that can be expected for any other period.
The need to ensure available specialized labor resources for projects also drives strategic relationships with customers and project margins. These trendsChallenges faced by the Company to ensure available specialized labor resources, include an aging workforce and labor availability issues, as well as increasing duration and complexity of customer capital programs. In 2021 and the first quarterMost of 2022, the markets the segment operates in saw an increase inhave experienced labor shortages which in some cases have caused increased labor-related costs. The Company continues to monitor the labor markets and expects labor costs to continue to increase based on increases included in the increased demand for servicescollective bargaining agreements and, to a lesser extent, the recent escalated inflationary environment in the United States. Due to these and other factors, the Company believes overall customer and competitor demand for labor resources will continue to increase, possibly surpassing the supply of industry resources.increase.
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Earnings overview - The following information summarizes the performance of the construction services segment.
Three Months EndedThree Months Ended
March 31,March 31,
2022 2021 Variance 2023 2022 Variance
(In millions) (In millions)
Operating revenuesOperating revenues$552.6 $518.5 %Operating revenues$754.3 $552.6 37 %
Cost of sales:Cost of sales:Cost of sales:
Operation and maintenanceOperation and maintenance471.1 427.2 10 %Operation and maintenance653.9 471.1 39 %
Depreciation, depletion and amortizationDepreciation, depletion and amortization4.1 4.0 %Depreciation, depletion and amortization4.2 4.1 %
Taxes, other than incomeTaxes, other than income19.0 19.4 (2)%Taxes, other than income28.2 19.0 48 %
Total cost of salesTotal cost of sales494.2 450.6 10 %Total cost of sales686.3 494.2 39 %
Gross margin58.4 67.9 (14)%
Gross profitGross profit68.0 58.4 16 %
Selling, general and administrative expense:Selling, general and administrative expense:Selling, general and administrative expense:
Operation and maintenanceOperation and maintenance26.0 24.6 %Operation and maintenance29.9 26.0 15 %
Depreciation, depletion and amortizationDepreciation, depletion and amortization1.1 1.3 (15)%Depreciation, depletion and amortization1.3 1.1 18 %
Taxes, other than incomeTaxes, other than income1.8 1.7 %Taxes, other than income1.6 1.8 (11)%
Total selling, general and administrative expenseTotal selling, general and administrative expense28.9 27.6 %Total selling, general and administrative expense32.8 28.9 13 %
Operating incomeOperating income29.5 40.3 (27)%Operating income35.2 29.5 19 %
Other incomeOther income.1 .2 (50)%Other income2.8 .1 2700 %
Interest expenseInterest expense.9 .9 — %Interest expense3.7 .9 311 %
Income before income taxesIncome before income taxes28.7 39.6 (28)%Income before income taxes34.3 28.7 20 %
Income tax expenseIncome tax expense7.4 9.8 (24)%Income tax expense8.2 7.4 11 %
Net incomeNet income$21.3 $29.8 (29)%Net income$26.1 $21.3 22 %
Operating StatisticsRevenuesGross margin
Three Months EndedThree Months Ended
March 31,March 31,
Business Line2022 2021 2022 2021 
(In millions)
Electrical & mechanical
Commercial$188.1 $166.1 $20.3 $17.5 
Industrial95.0 126.4 9.8 17.2 
Institutional40.7 32.1 .6 2.2 
Renewables24.9 .6 1.0 .3 
Service & other46.5 31.2 5.7 5.0 
395.2 356.4 37.4 42.2 
Transmission & distribution
Utility143.0 141.3 19.9 23.8 
Transportation17.9 24.1 1.1 1.9 
160.9 165.4 21.0 25.7 
Intrasegment eliminations(3.5)(3.3)— — 
$552.6 $518.5 $58.4 $67.9 
41

Index
Operating StatisticsRevenuesGross profit
Three Months EndedThree Months Ended
March 31,March 31,
2023 2022 2023 2022 
(In millions)
Electrical & mechanical
Commercial$346.1 $188.1 $30.0 $20.3 
Industrial127.7 95.0 13.1 9.8 
Institutional55.5 40.7 1.7 .6 
Renewables11.7 24.9 (.5)1.0 
Service & other52.1 46.5 5.6 5.7 
593.1 395.2 49.9 37.4 
Transmission & distribution
Utility152.4 143.0 17.9 19.9 
Transportation12.5 17.9 .2 1.1 
164.9 160.9 18.1 21.0 
Intrasegment eliminations(3.7)(3.5)— — 
$754.3 $552.6 $68.0 $58.4 
Three Months Ended March 31, 2022,2023, Compared to Three Months Ended March 31, 20212022 Construction services earnings decreased $8.5increased $4.8 million as a result of:
Revenues increased $34.1$201.7 million.
Largely due to:to higher electrical and mechanical workloads as a result of:
Higher commercial workloads of $29.0driven largely by a $126.7 million increase in the hospitality sector and a $49.0 million increase in data center work primarily from the progress on large ongoing projects; partially offset by a $13.0 million decrease in general commercial sector workloads.
Higher industrial workloads in the hospitalityhigh-tech and government sectors of $29.1 million and $5.2 million, respectively; partially offset by lower maintenance workloads.
Higher institutional workloads, primarily in the healthcare sector of $9.5 million and the education sector of $4.6 million.
Higher service workloads of $5.6 million from the repair and maintenance for electrical and mechanical projects.
Offset partially by lower renewable workloads of $13.0 million due to the completion of renewable projects.
Also contributing were higher utility workloads as a result of increases in storm work of $18.6 million, the underground sector of $5.5 million and the substation sector of $3.4 million; offset by lower workloads in the electrical sector of $21.4 million and the distribution sector of $4.4 million.
46

Index
Gross profit increased $9.6 million.
Largely due to higher gross profit on electrical and mechanical work in the commercial, industrial and institutional sector of $14.1 million due to higher revenues and project mix, offset partially by lower renewable margins from the absence of higher margin work resulting from the timing of project completions.
Higher renewable workloads, largely from commercial customers, of $24.3 million due to new projects.
Higher utility workloads, primarily in the distributioncompletions and electrical sectors of $16.0 million.
Increased service work for the repair and maintenance of electric systems and higher institutional project demand in the education and government sectors from the mix of project work.starts.
Partially offset by:
DecreasedHigher overall operating costs related to inflationary pressures, including increased labor, subcontractor and equipment costs.
Losses of $6.5 million on certain industrial workloads, primarily in the high-tech sector of $37.5 million resultingand institutional projects.
Lower transmission and distribution margins from the absence of a significant project completed in the prior year.
Decreased storm-repair and fire-hardening power line work of $15.0 million.
Lower electric transportation workloads, mostly traffic signalization and street lightinghigher margin utility projects and work for governmental customers, as a result of reduced demand for services and prior year weather events.
Gross margin decreased $9.5 million.
Largely due to:
The absence of higher margin work due to the timing of project completions and project starts mainly contributed to lower industrial and institutional margins of $9.0 million.
Lower utility margins from the absence in 2022 of storm-repair and fire-hardening power line work of $3.9 million, which largely resulted from the mixtype of customer projects.
Decreasedprojects and lower transportation margins, primarily onin the street lighting and traffic signalization projects.
Partially offset by increased commercial, renewable and service margins of $4.2 million due substantially to the different project mix.sector.
Selling, general and administrative expense increased $1.3$3.9 million.
Primarily due to:
Increased payroll-related costs of $2.0 million due to increased support functions for revenue growth, as previously discussed.
Increased reserve for uncollectible accounts of $1.1 million.$800,000 due to economic factors and an increase in receivable balances over 90 days.
Increased office expenses of $1.1 million.
Partially offset by decreased payroll-related costs of $600,000 and lower professional fees.$700,000.
Other income was comparableincreased $2.7 million, primarily related to the same period in the prior year.Company's joint ventures.
Interest expense was comparableincreased $2.8 million due to the same period in the prior year.higher working capital needs and higher average interest rates.
Income tax expense decreased $2.4 million directlyincreased $800,000 primarily resulting from a decreasean increase in income before income taxes.
Outlook Funding for public projects is highly dependent on federal and state funding, such as appropriations to the Federal Highway Administration. The American Rescue Plan act approved by the United States Congress and signed into law by the President of the United States in the first quarter of 2021 provides $1.9 trillion in COVID-19 relief funding for states, schools and local government including broadband infrastructure. States are beginning to move forward with allocating these funds based on federal criteria and state needs, and in some cases, funding of infrastructure projects could positively impact the segment. Additionally, the bipartisan infrastructure proposal, known as the Infrastructure Investment and Jobs Act, was approved by the United States Congress and signed into law by the President of the United Statesenacted in the fourth quarter of 2021. These include2021 and is providing long-term opportunities by designating funds for investments for upgrades to electric and grid infrastructure, transportation systems, airports and electric vehicle infrastructure, all industries this segment supports. In addition, the IRA provides $369 billion in new funding for clean energy programs. These programs include new tax incentives for solar, battery storage and hydrogen development along with funding to expand the production of electric vehicles and the build out of infrastructure to support electric vehicles. The Company will continue to monitor the implementation of these legislative items.
The Company continues to have bidding opportunities in boththe specialty contracting markets in 2022which it operated in during 2023 as evidenced by the segment's backlog. Although bidding remains highly competitive in all areas, the Company expects the segment's relationship with existing customers, skilled workforce, quality of service and effective cost management will continue to provide a benefit in securing and executing profitable projects in the future. The Company has also seen rapidly growing needs for services across the electric vehicle charging, wind generation and energy storage markets that complement existing renewable projects performed by the Company.
The construction services segment's backlog at March 31, was as follows:
20222021
(In millions)
Electrical & mechanical$1,388 $1,009 
Transmission & distribution280264
$1,668 $1,273 
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Index
20232022
(In millions)
Electrical & mechanical$1,792 $1,388 
Transmission & distribution306280
$2,098 $1,668 
The 31 percent increase in backlog at March 31, 2022,2023, as compared to backlog at March 31, 2021,2022, was largely attributable to the new project opportunities that the Company continues to be awarded across its diverse operations, particularly within the commercial, industrial, institutional renewable and power utilitytransportation markets. TheseThe increases werein backlog have been partially offset by decreases in the industrialrenewable and transportation markets due to the timing of project completions. Period over period increases or decreases in backlog cannot be used as an indicator of future revenues or net income. TheWhile the Company expectsbelieves the current backlog of work remains firm, prolonged delays in the receipt of critical supplies and materials could result in customers seeking to complete an estimated $1.4 billiondelay or terminate existing or pending agreements. As of backlog at March 31, 2022, during2023, the next 12 months.Company has not experienced any material impacts related to customer notices indicating that they no longer wish to proceed with planned projects that have been included in backlog. Additionally, the Company continues to further evaluate potential acquisition opportunities that would be accretive to earnings of the CompanyCompany's backlog and continue to grow the segment's backlog.revenues and earnings. Factors noted in Part I, Item 1A. Risk Factors in the 20212022 Annual Report can cause revenues to be realized in periods and at levels that are different from originally projected.
The labor contract that the construction services segment was negotiating at December 31, 2021, as reported in Items 1 and 2 - Business Properties - General in the 2021 Annual Report, has been ratified.
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Index
Other
Three Months Ended
March 31,
 2022 2021 Variance
(In millions)
Operating revenues$4.3 $3.3 30 %
Operating expenses:
Operation and maintenance4.0 2.3 74 %
Depreciation, depletion and amortization1.1 1.2 (8)%
Total operating expenses5.1 3.5 46 %
Operating loss(.8)(.2)NM
Other income.1 .1 — %
Interest expense.1 .1 — %
Loss before income taxes(.8)(.2)NM
Income tax expense3.7 2.5 48 %
Net loss$(4.5)$(2.7)67 %
*NM - not meaningful
Three Months Ended
March 31,
 2023 2022 Variance
(In millions)
Operating revenues$4.7 $4.3 %
Operating expenses:
Operation and maintenance12.4 4.0 210 %
Depreciation, depletion and amortization1.1 1.1 — %
Total operating expenses13.5 5.1 165 %
Operating loss(8.8)(.8)1,000 %
Other income.6 .1 500 %
Interest expense.9 .1 800 %
Loss before income taxes(9.1)(.8)1,038 %
Income tax expense1.2 3.7 (68)%
Net loss$(10.3)$(4.5)127 %
Three Months Ended March 31, 2022,2023, Compared to Three Months Ended March 31, 20212022
Other experienced higher operation and maintenance expense in 2022 related to a loss on the disposal of assets. Premiums forCompany's strategic initiatives. Income tax expense was lower due to the captive insurer were higher in 2022 compared to 2021, which impacts both operationbenefit from deductible strategic initiative costs and maintenance expense and operating revenues. The net loss for Other also reflectslower income tax adjustments related to the consolidated company'sCompany's annualized estimated tax rate. General
Also included in Other is insurance activity at the Company's captive insurer and general and administrative costs and interest expense previously allocated to the exploration and production and refining businesses that do not meet the criteria for income (loss) from discontinued operations are also included in Other.operations.
Intersegment Transactions
Amounts presented in the preceding tables will not agree with the Consolidated Statements of Income due to the Company's elimination of intersegment transactions. The amounts related to these items were as follows:
Three Months EndedThree Months Ended
March 31,March 31,
2022 2021  2023 2022 
(In millions) (In millions)
Intersegment transactions:Intersegment transactions:Intersegment transactions:
Operating revenuesOperating revenues$31.7 $30.9 Operating revenues$31.8 $31.7 
Operation and maintenanceOperation and maintenance5.8 4.9 Operation and maintenance5.5 5.8 
Purchased natural gas soldPurchased natural gas sold25.9 26.0 Purchased natural gas sold26.3 25.9 
For more information on intersegment eliminations, see Note 17.
Liquidity and Capital Commitments
At March 31, 2022,2023, the Company had cash and cash equivalents of $64.9$93.2 million and available borrowing capacity of $523.5$421.1 million under the outstanding credit facilities of the Company's subsidiaries. In anticipation of the separation of Knife River, the Company is evaluating the refinancing of current debt facilities, as well as other debt facilities for Knife River as discussed in Note 21. The Company also continues to monitor financial services disruptions but does not have any material exposure to the recently distressed financial institutions. The Company has experienced slight disruptions in the commercial paper market, but with access to its revolving credit agreements the Company has not experienced any liquidity issues. The Company expects to meet its obligations for debt maturing within one year and its other operating and capital requirements from various sources, including internally generated funds; credit facilities and commercial paper of the Company's subsidiaries, as described in Capital resources; and issuance of debt and equity securities if necessary.
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Cash flows
Three Months EndedThree Months Ended
March 31,March 31,
2022 2021  2023 2022 
(In millions)(In millions)
Net cash provided by (used in):Net cash provided by (used in):Net cash provided by (used in):
Operating activitiesOperating activities$112.4 $95.6 Operating activities$(43.6)$112.4 
Investing activitiesInvesting activities(150.7)(106.3)Investing activities(151.0)(150.7)
Financing activitiesFinancing activities49.0 6.2 Financing activities207.3 49.0 
Increase (decrease) in cash and cash equivalents10.7 (4.5)
Increase in cash and cash equivalentsIncrease in cash and cash equivalents12.7 10.7 
Cash and cash equivalents -- beginning of yearCash and cash equivalents -- beginning of year54.2 59.6 Cash and cash equivalents -- beginning of year80.5 54.2 
Cash and cash equivalents -- end of periodCash and cash equivalents -- end of period$64.9 $55.1 Cash and cash equivalents -- end of period$93.2 $64.9 
Operating activities 
Three Months EndedThree Months Ended
March 31,March 31,
2022 2021 Variance 2023 2022 Variance
(In millions)(In millions)
Components of net cash provided by operating activities:
Components of net cash provided by (used in) operating activities:Components of net cash provided by (used in) operating activities:
Income from continuing operationsIncome from continuing operations$31.7 $52.1 $(20.4)Income from continuing operations$38.3 $31.7 $6.6 
Adjustments to reconcile net income to net cash provided by operating activitiesAdjustments to reconcile net income to net cash provided by operating activities78.9 82.5 (3.6)Adjustments to reconcile net income to net cash provided by operating activities89.0 78.9 10.1 
Changes in current assets and liabilities, net of acquisitions:Changes in current assets and liabilities, net of acquisitions:
ReceivablesReceivables(5.7)89.7 (95.4)Receivables15.0 (5.7)20.7 
InventoriesInventories(44.1)(25.6)(18.5)Inventories(40.9)(44.1)3.2 
Other current assetsOther current assets34.5 (46.8)81.3 Other current assets(58.3)34.5 (92.8)
Accounts payableAccounts payable3.0 (42.0)45.0 Accounts payable(93.5)3.0 (96.5)
Other current liabilitiesOther current liabilities13.1 (14.0)27.1 Other current liabilities16.7 13.1 3.6 
Pension & postretirement benefit plan contributions(.1)(.1)— 
Pension and postretirement benefit plan contributionsPension and postretirement benefit plan contributions(.1)(.1)— 
Other noncurrent changesOther noncurrent changes1.1 (.2)1.3 Other noncurrent changes(9.8)1.1 (10.9)
Net cash provided by operating activities$112.4 $95.6 $16.8 
Net cash provided by (used in) operating activitiesNet cash provided by (used in) operating activities$(43.6)$112.4 $(156.0)
The changes in cash flows from operating activities generally follow the results of operations, as discussed in Business Segment Financial and Operating Data, and are affected by changes in working capital. The increase in cash flows provided byused in operating activities in the previous table was largelyprimarily driven by the recoverypayment of purchased gas adjustment balances and the absence of higherincreased natural gas purchases in February 2021, as discussed in Note 13,costs and timing of collection from customers at the natural gas distribution business, partially offset by the associated deferred taxes. Partially offsettingtaxes, as well as the net increasepurchase of environmental allowances in cash flows provided by operating activities was higher2023, as discussed in Note 13. Higher working capital needs resulting from fluctuations in job activity at the construction services business also contributed to the increase. Partially offsetting the increase in cash flows used in operating activities was lower working capital needs due to fluctuations in job activity resulting in higher receivables in the period, as well as lower collectionscollection of accounts receivable compared to first quarter 2021, offset in part by increased accounts payable. In addition,balances at the construction materials and contracting business experienced an increase in asphalt oil inventory balances as a result of higher prices.business.
Investing activities
Three Months EndedThree Months Ended
March 31,March 31,
2022 2021 Variance 2023 2022 Variance
(In millions)(In millions)
Components of net cash used in investing activities:Components of net cash used in investing activities:Components of net cash used in investing activities:
Capital expendituresCapital expenditures$(150.3)$(111.1)$(39.2)Capital expenditures$(154.0)$(150.3)$(3.7)
Acquisitions, net of cash acquiredAcquisitions, net of cash acquired(.5)(1.0).5 Acquisitions, net of cash acquired— (.5).5 
Net proceeds from sale or disposition of property and otherNet proceeds from sale or disposition of property and other4.5 9.0 (4.5)Net proceeds from sale or disposition of property and other7.2 4.5 2.7 
InvestmentsInvestments(4.4)(3.2)(1.2)Investments(4.2)(4.4).2 
Net cash used in investing activitiesNet cash used in investing activities$(150.7)$(106.3)$(44.4)Net cash used in investing activities$(151.0)$(150.7)$(.3)
The increase in cash used in investing activities in the previous table was primarily dueremained consistent as compared to increased2022. Increased capital expenditures at the natural gas distribution and construction services businesses were offset in 2022part by decreased capital expenditures at the pipeline business related to the North Bakken Expansion project. Net proceeds from the sale or disposition of property at the electric and natural gas distribution businesses relatedincreased due to increased electric production and distribution projectslower costs of removal and higher natural gas distribution projects including natural gas meters and mains. The pipeline business also experienced increased capital expenditures, primarily related to the North Bakken Expansion project.salvage value on assets.
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Financing activities
Three Months EndedThree Months Ended
March 31,March 31,
2022 2021 Variance 2023 2022 Variance
(In millions)(In millions)
Components of net cash provided by financing activities:Components of net cash provided by financing activities:Components of net cash provided by financing activities:
Issuance of short-term borrowingsIssuance of short-term borrowings$100.0 $50.0 $50.0 Issuance of short-term borrowings$275.0 $100.0 $175.0 
Repayment of short-term borrowingsRepayment of short-term borrowings— (50.0)50.0 Repayment of short-term borrowings(20.0)— (20.0)
Issuance of long-term debtIssuance of long-term debt150.0 93.3 56.7 Issuance of long-term debt175.4 150.0 25.4 
Repayment of long-term debtRepayment of long-term debt(143.6)(53.3)(90.3)Repayment of long-term debt(169.9)(143.6)(26.3)
Debt issuance costsDebt issuance costs(.7)— (.7)Debt issuance costs(.1)(.7).6 
Net proceeds from issuance of common stockNet proceeds from issuance of common stock(.1)19.7 (19.8)Net proceeds from issuance of common stock— (.1).1 
Dividends paidDividends paid(44.2)(42.6)(1.6)Dividends paid(45.2)(44.2)(1.0)
Repurchase of common stockRepurchase of common stock(7.4)(6.7)(.7)Repurchase of common stock(4.8)(7.4)2.6 
Tax withholding on stock-based compensationTax withholding on stock-based compensation(5.0)(4.2)(.8)Tax withholding on stock-based compensation(3.1)(5.0)1.9 
Net cash provided by financing activitiesNet cash provided by financing activities$49.0 $6.2 $42.8 Net cash provided by financing activities$207.3 $49.0 $158.3 
The increase in cash provided by financing activities in the previous table was largelyprimarily due to the resultissuance of short-term borrowings at the natural gas distribution business to fund higher natural gas costs, as well as increased issuance of short-term and long-term debt at the construction materials and contractingservices business to finance acquisitions andas a result of higher working capital needs, partially offset by the repayment ofneeds. Partially offsetting these increases were higher commercial paper borrowings that were replaced byand short-term debt repayments at the electric and private placement borrowings. In addition, the pipeline and construction services businesses experienced increased commercial paper borrowings to finance increased capital expenditures and higher working capital needs, respectively. Partially offsetting the increase in cash provided by financing activities was the absence of the issuance of common stock under the Company's "at-the-market" offering during 2022, as discussed in Note 7.
Defined benefit pension plans
There were no material changes to the Company's qualified noncontributory defined benefit pension plans from those reported in the 2021 Annual Report. For more information, see Note 18 and Part II, Item 7 in the 2021 Annual Report.natural gas distribution businesses.
Capital expenditures
Capital expenditures for the first three months of 2023 and 2022 and 2021 were $119.8$136.7 million and $107.2$119.8 million, respectively. Capital expenditures allocated to the Company's business segments are estimated to be approximately $769.9$646.4 million for 2022.2023. Capital expendituresexpenditure estimates have been updated from what was previously reported in the 20212022 Annual Report to accommodate project timeline and scope changes made throughout the first quarter of 2022.2023.
The Company has included in the estimated capital expenditures for 2022 the Wahpeton Expansion and additional2023 multiple organic growth projects at the pipeline segmentbusiness and construction of Heskett Unit 4 at the natural gas distribution segment,electric business, as previously discussed in Business Segment Financial and Operating Data, as well as system upgrades; routine replacements; service extensions; routine equipment maintenance and replacements; buildings, land and building improvements; pipeline and natural gas storage projects; power generation and transmission opportunities, environmental upgrades; and other growth opportunities.
The Company continues to evaluate potential future acquisitions and other growth opportunities that would be incremental to the outlined capital program; however, they are dependent upon the availability of economic opportunities and, as a result, capital expenditures may vary significantly from the estimate previously discussed. The Company continuously monitors its capital expenditures for project delays and changes in economic viability and adjusts as necessary. It is anticipated that all of the funds required for capital expenditures for 20222023 will be funded by various sources, including internally generated funds; credit facilities and commercial paper of the Company's subsidiaries, as described later; and issuance of debt and equity securities if necessary.
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Capital resources
The Company requires significant cash to support and grow its businesses. The primary sources of cash other than cash generated from operating activities are cash from revolving credit facilities, cash from the issuance of long-term debt and cash from the sale of equity securities.
Debt resources
Certain debt instruments of the Company's subsidiaries contain restrictive and financial covenants and cross-default provisions. In order to borrow under the respective debt instruments, the subsidiary companies must be in compliance with the applicable covenants and certain other conditions, all of which the subsidiaries, as applicable, were in compliance with at March 31, 2022.2023. In the event the subsidiaries do not comply with the applicable covenants and other conditions, alternative sources of funding may need to be pursued. As of March 31, 2023, the Company had investment grade credit ratings at all entities issuing debt. For more information on the covenants, certain other conditions and cross-default provisions, see Part II, Item 8 in the 20212022 Annual Report.
The following table summarizes the outstanding revolving credit facilities of the Company's subsidiaries at March 31, 2022:2023:
CompanyCompanyFacility Facility
Limit
 Amount
Outstanding
 Letters
of Credit
 Expiration
Date
CompanyFacility Facility
Limit
 Amount
Outstanding
 Letters
of Credit
 Expiration
Date
(In millions)(In millions)
Montana-Dakota Utilities Co.Montana-Dakota Utilities Co.Commercial paper/Revolving credit agreement(a)$175.0  $29.4 $—  12/19/24Montana-Dakota Utilities Co.Commercial paper/Revolving credit agreement(a)$175.0  $67.6 $—  12/19/24
Cascade Natural Gas CorporationCascade Natural Gas CorporationRevolving credit agreement $100.0 (b)$49.9  $2.2 (c)6/7/24Cascade Natural Gas CorporationRevolving credit agreement $100.0 (b)$10.7  $2.2 (c)11/30/27
Intermountain Gas CompanyIntermountain Gas CompanyRevolving credit agreement $85.0 (d)$35.9  $— 6/7/24Intermountain Gas CompanyRevolving credit agreement $100.0 (d)$—  $— 10/13/27
Centennial Energy Holdings, Inc.Centennial Energy Holdings, Inc.Commercial paper/Revolving credit agreement(e)$600.0  $319.1 $— 12/19/24Centennial Energy Holdings, Inc.Commercial paper/Revolving credit agreement(e)$600.0  $473.4 $— 12/19/24
(a)The commercial paper program is supported by a revolving credit agreement with various banks (provisions allow for increased borrowings, at the option of Montana-Dakota on stated conditions, up to a maximum of $225.0 million). At March 31, 2022,2023, there were no amounts outstanding under the revolving credit agreement.
(b)Certain provisions allow for increased borrowings, up to a maximum of $125.0 million.
(c)Outstanding letter(s) of credit reduce the amount available under the credit agreement.
(d)Certain provisions allow for increased borrowings, up to a maximum of $110.0$125.0 million.
(e)The commercial paper program is supported by a revolving credit agreement with various banks (provisions allow for increased borrowings, at the option of Centennial on stated conditions, up to a maximum of $700.0 million). At March 31, 2022,2023, there were no amountswas $78.4 million outstanding under the revolving credit agreement.
The respective commercial paper programs are supported by revolving credit agreements. While the amount of commercial paper outstanding does not reduce available capacity under the respective revolving credit agreements, Montana-Dakota and Centennial do not issue commercial paper in an aggregate amount exceeding the available capacity under the credit agreements. The commercial paper borrowings may vary during the period, largely the result of fluctuations in working capital requirements due to the seasonality of certain operations of the Company's subsidiaries.
Total equity as a percent of total capitalization was 5452 percent 57 percentat March 31, 2023 and 5554 percent at March 31, 2022 and 2021, and December 31, 2021, respectively.2022. This ratio is calculated as the Company's total equity, divided by the Company's total capital. Total capital is the Company's total debt, including short-term borrowings and long-term debt due within one year,12 months, plus total equity. ThisManagement believes this ratio is an indicator of how a companythe Company is financing its operations, as well as its financial strength.
MDU Resources Group, Inc. On May 1, 2023, MDU Resources Group, Inc. entered into a $75.0 million term loan agreement with a SOFR-based interest rate and a maturity date of November 1, 2023. The agreement contains customary covenants and provisions, including a covenant of MDU Resources not to permit, at any time, the ratio of total debt to total capitalization to be greater than 65 percent. The covenants also include certain restrictions on the sale of certain assets, loans and investments.
Cascade On January 20, 2023, Cascade entered into a $150.0 million term loan agreement with a SOFR-based interest rate and a maturity date of January 19, 2024. The agreement contains customary covenants and provisions, including a covenant of Cascade not to permit, at any time, the ratio of total debt to total capitalization to be greater than 65 percent. The covenants also include certain restrictions on the sale of certain assets, loans and investments.
Intermountain On January 20, 2023, Intermountain entered into a $125.0 million term loan agreement with a SOFR-based interest rate and a maturity date of January 19, 2024. In March and April 2023, Intermountain repaid $20.0 million and $30 million, respectively, of the outstanding balance. The agreement contains customary covenants and provisions, including a covenant of Intermountain not to permit, at any time, the ratio of total debt to total capitalization to be greater than 65 percent. The covenants also include certain restrictions on the sale of certain assets, loans and investments.
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Index
Centennial On March 18, 2022, Centennial entered into a $100.0 million term loan agreement with a SOFR-based variable interest rate and a maturity date of March 17, 2023. On March 17, 2023, Centennial amended this agreement to extend the maturity date to September 15, 2023. The agreement contains customary covenants and provisions, including a covenant of Centennial not to permit, at any time, the ratio of total debt to total capitalization to be greater than 65 percent. The covenants also include certain restrictions on the sale of certain assets, loans and investments.
On March 23, 2022, Centennial issued $150.0 million of senior notes under a note purchase agreement with maturity dates ranging from March 23, 2032 to March 23, 2034, at a weighted average interest rate of 3.71 percent. The agreement contains customary covenants and provisions, including a covenant of Centennial not to permit, at any time, the ratio of total debt to total capitalization to be greater than 60 percent.
Equity Resources
The Company currently has a shelf registration statement on file with the SEC, under which the Company may issue and sell any combination of common stock and debt securities. The Company may sell such securities if warranted by market conditions and the Company's capital requirements. Any public offer and sale of such securities will be made only by means of a prospectus meeting the requirements of the Securities Act and the rules and regulations thereunder.
In August 2020, the Company amended the Distribution Agreement dated February 22, 2019, with J.P. Morgan Securities LLC and MUFG Securities Americas Inc., as sales agents. This agreement, as amended, allows the offering, issuance and sale of up to 6.4 million shares of the Company's common stock in connection with an "at-the-market" offering. The common stock may be
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Index
offered for sale, from time to time, in accordance with the terms and conditions of this agreement. As of March 31, 2022,2023, the Company had capacity to issue up to 3.6 million additional shares of common stock under the "at-the-market" offering program. Proceeds from the sale of shares of common stock under this agreement have been and are expected to be used for general corporate purposes, which may include, among other things, working capital, capital expenditures, debt repayment and the financing of acquisitions.
DetailsThe Company had no issuances of shares under the Company's "at-the-market" offering activity was as follows:
Three Months Ended
March 31,
20222021
(In millions)
Shares issued— .7 
Net proceeds *$(.1)$19.7 **
*    Net proceeds include issuance costs of $127,000 and $300,000program for both the three months ended March 31, 20222023 and 2021, respectively
**    Net proceeds were used for capital expenditures.
2022.
Material cash requirements
There were no material changes in the Company's contractual obligations related to estimated interest payments, purchase commitments, asset retirement obligations and uncertain tax positions for 2023 from those reported in the 2022 Annual Report. For more information on the Company's contractual obligations on long-term debt, operating leases and purchase commitments, see Part II, Item 7 in the 2021 Annual Report. There were no material changes in the Company's contractual obligations related to estimated interest payments, purchase commitments, asset retirement obligations, uncertain tax positions and minimum funding requirements for its defined benefit plans for 2022 from those reported in the 2021 Annual Report.
Material short-term cash requirements of the Company include repayment of outstanding borrowings and interest payments on those agreements, payments on operating lease agreements, payment of obligations on purchase commitments and asset retirement obligations.
Material long-term cash requirements of the Company include repayment of outstanding borrowings and interest payments on those agreements, payments on operating lease agreements, payment of obligations on purchase commitments and asset retirement obligations.
Defined benefit pension plans
The Company has noncontributory qualified defined benefit pension plans. Various assumptions are used in calculating the benefit expense (income) and liability (asset) related to these plans, as such costs of providing these benefits bear the risk of changes as they are dependent upon assumptions of future conditions.
There were no other material changes to the Company's qualified noncontributory defined benefit pension plans from those reported in the 2022 Annual Report other than the Company expects to contribute approximately $8.3 million to its pension plans in 2023, largely resulting from an actual decline in asset values decreasing the funded status of the plans. For more information, see Note 18 and Part II, Item 7 in the 2022 Annual Report.
New Accounting Standards
For information regarding new accounting standards, see Note 2, which is incorporated by reference.
Critical Accounting Estimates
The Company's critical accounting estimates include impairment testing of goodwill; fair values of acquired assets and liabilities under the acquisition method of accounting; regulatory assets expected to be recovered in rates charged to customers; revenue recognized using the cost-to-cost measure of progress for contracts; actuarially determined benefit costs; and tax provisions. There were no material changes in the Company's critical accounting estimates from those reported in the 20212022 Annual Report. For more information on critical accounting estimates, see Part II, Item 7 in the 20212022 Annual Report.
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Item 3. Quantitative and Qualitative Disclosures About Market Risk
The Company is exposed to the impact of market fluctuations associated with interest rates and commodity prices. The Company has policies and procedures to assist in controlling these market risks and from time to time has utilized derivatives to manage a portion of its risk.
Interest rate risk
There were no material changesRising interest rates have resulted in and will likely continue to result in higher borrowing costs on new debt and existing variable interest rate risk faced bydebt. The Company has realized increases in the Companyweighted average interest rates on the commercial paper programs and revolving credit facilities of its subsidiaries of 1.05 percent and 1.73 percent, respectively, from those reported in the 20212022 Annual Report.
At March 31, 2022,2023, the Company had no outstanding interest rate hedges.
Commodity price risk
There were no material changes to commodity price risk faced by the Company from those reported in the 20212022 Annual Report.
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Item 4. Controls and Procedures
Evaluation of disclosure controls and procedures
The term "disclosure controls and procedures" is defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act. The Company's disclosure controls and other procedures are designed to provide reasonable assurance that information required to be disclosed in the reports that the Company files or submits under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC's rules and forms. The Company's disclosure controls and other procedures are designed to provide reasonable assurance that information required to be disclosed is accumulated and communicated to management, including the Company's chief executive officer and chief financial officer, to allow timely decisions regarding required disclosure. The Company's management, with the participation of the Company's chief executive officer and chief financial officer, has evaluated the effectiveness of the Company's disclosure controls and other procedures as of the end of the period covered by this report. Based upon that evaluation, the chief executive officer and the chief financial officer have concluded that, as of the end of the period covered by this report, such controls and procedures were effective at a reasonable assurance level.
Changes in internal controls
No change in the Company's internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) occurred during the three months ended March 31, 2022,2023, that has materially affected, or is reasonably likely to materially affect, the Company's internal control over financial reporting.
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Part II -- Other Information
Item 1. Legal Proceedings
There were no material changes to the Company's legal proceedings in Part 1, Item 3 - Legal Proceedings in the 20212022 Annual Report.
Item 1A. Risk Factors
Please refer to the Company's risk factors that are disclosed in Part I, Item 1A. Risk Factors in the 20212022 Annual Report that could be materially harmful to the Company's business, prospects, financial condition or financial results if they occur. At March 31, 2022,2023, there were no material changes to the Company's risk factors provided in Part I, Item 1A. Risk Factors in the 20212022 Annual Report.Report other than as set forth below.
The proposed separation of Knife River Holding Company into an independent, publicly traded company is subject to various risks and uncertainties, and may not be completed on the terms or timeline currently contemplated, if at all.
On August 4, 2022, the Company announced its plan to separate Knife River Holding Company, the construction materials and contracting business, from the Company, which would result in two independent, publicly traded companies, which is expected to occur in May of 2023. The execution of the proposed separation has required and will continue to require significant time and attention from the Company’s senior management and employees, which could disrupt the Company’s ongoing business and adversely affect financial results and results of operations. Further, the Company's employees may be distracted due to the uncertainty regarding their future roles with the Company or Knife River Holding Company pending the consummation of the proposed separation. Additionally, foreseen and unforeseen costs may be incurred in connection with the proposed separation, including fees such as advisory, accounting, tax, legal, reorganization, debt breakage, restructuring, severance/employee benefit-related, regulatory, SEC filing and other professional services, some of which may be incurred regardless of when the separation occurs. The proposed separation is also complex, and completion of the proposed separation and the timing of its completion will be subject to a number of factors and conditions, including the readiness of the new company to operate as an independent public company and finalization of the capital structure of the new company. Unanticipated developments could delay, prevent or otherwise adversely affect the proposed separation, including, but not limited to, changes in general economic and financial market conditions, material adverse changes in business or industry conditions, unanticipated costs and potential problems or delays in obtaining various regulatory and tax approvals or clearances. In particular, changes in interest or exchange rates and the effects of inflation could delay or adversely affect the proposed separation, including in connection with any debt financing transactions undertaken in connection with the separation or the terms of any indebtedness incurred in connection therewith. There can be no assurances that the Company will be able to complete the proposed separation on the terms or timeline that was announced, if at all.
The Company is a holding company and relies on cash from its subsidiaries to pay dividends.
The Company's investments in its subsidiaries comprise the Company's primary assets. The Company depends on earnings, cash flows and dividends from its subsidiaries to pay dividends on its common stock. Regulatory, contractual and legal limitations, as well as their capital requirements, affect the ability of the subsidiaries to pay dividends to the Company and thereby could restrict or influence the Company's ability or decision to pay dividends on its common stock, which could adversely affect the Company's stock price.
There is no assurance as to the amount, if any, of future dividends to the holding company because the subsidiaries depend on future earnings, capital requirements and financial conditions to fund such dividends. Following the separation of Knife River, the Company's board of directors expects to review its dividend practice with the intent to align payout relative to regulated energy delivery earnings with pure-play peer companies.
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Item 2. Unregistered Sales of Equity Securities and Use of Proceeds
The following table includes information with respect to the Company's purchase of equity securities:
ISSUER PURCHASES OF EQUITY SECURITIES
PeriodPeriod(a)
Total Number
of Shares
(or Units)
Purchased (1)
(b)
Average Price
Paid per Share
(or Unit)
(c)
Total Number of Shares
(or Units) Purchased
as Part of Publicly
Announced Plans
or Programs (2)
(d)
Maximum Number (or
Approximate Dollar
Value) of Shares (or
Units) that May Yet Be
Purchased Under the
Plans or Programs (2)
Period(a)
Total Number
of Shares
(or Units)
Purchased (1)
(b)
Average Price
Paid per Share
(or Unit)
(c)
Total Number of Shares
(or Units) Purchased
as Part of Publicly
Announced Plans
or Programs (2)
(d)
Maximum Number (or
Approximate Dollar
Value) of Shares (or
Units) that May Yet Be
Purchased Under the
Plans or Programs (2)
January 1 through January 31, 2022— $— — — 
February 1 through February 28, 2022266,821 $27.73 — — 
March 1 through March 31, 2022— $— — — 
January 1 through January 31, 2023January 1 through January 31, 2023— $— — — 
February 1 through February 28, 2023February 1 through February 28, 2023153,622 $31.32 — — 
March 1 through March 31, 2023March 1 through March 31, 2023— $— — — 
TotalTotal266,821 $27.73 — — Total153,622 $31.32 — — 
(1)    Represents shares of common stock purchased on the open market in connection with the vesting of shares granted pursuant to the Long-Term Performance-Based Incentive Plan.
(2)    Not applicable. The Company does not currently have in place any publicly announced plans or programs to purchase equity securities.
Item 4. Mine Safety Disclosures
For information regarding mine safety violations or other regulatory matters required by Section 1503(a) of the Dodd-Frank Act and Item 104 of Regulation S-K, see Exhibit 95 to this Form 10-Q, which is incorporated herein by reference.
Item 5. Other Information
None.
Item 6. Exhibits
See the index to exhibits immediately preceding the signature page to this report.
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Index
Exhibits Index
Incorporated by Reference
Exhibit NumberExhibit DescriptionFiled
Herewith
FormPeriod
Ended
ExhibitFiling
Date
File Number
3(a)8-K3.25/8/191-03480
3(b)8-K3.12/15/191-03480
31(a)X
31(b)X
32X
95X
101.INSXBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document
101.SCHXBRL Taxonomy Extension Schema Document
101.CALXBRL Taxonomy Extension Calculation Linkbase Document
101.DEFXBRL Taxonomy Extension Definition Linkbase Document
101.LABXBRL Taxonomy Extension Label Linkbase Document
101.PREXBRL Taxonomy Extension Presentation Linkbase Document
104Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101)
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Signatures
Pursuant to the requirements of the Exchange Act, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.
  MDU RESOURCES GROUP, INC.
    
DATE:May 5, 20224, 2023BY:/s/ Jason L. Vollmer
   Jason L. Vollmer
   Vice President and Chief Financial Officer
    
    
  BY:/s/ Stephanie A. Barth
   Stephanie A. Barth
   Vice President, Chief Accounting Officer
and Controller


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