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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 10-Q
(Mark One)
    Quarterly Report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
For the quarterly period ended SeptemberJune 30, 20222023 or
    Transition Report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
Commission File Number 0-53713 
OTTER TAIL CORPORATION
(Exact name of registrant as specified in its charter) 
Minnesota
(State or other jurisdiction of incorporation or organization)
27-0383995
(I.R.S. Employer Identification No.)
215 South Cascade Street, Box 496, Fergus Falls, Minnesota
(Address of principal executive offices)
56538-0496
(Zip Code)
Registrant's telephone number, including area code: 866-410-8780
Securities registered pursuant to Section 12(b) of the Act: 
Title of each classTrading Symbol(s)Name of each exchange on which registered
Common Shares, par value $5.00 per shareOTTRThe Nasdaq Stock Market LLC
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 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 or a smaller reporting 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. (Check one): 
 
Large Accelerated Filer
Accelerated Filer
 
Non-Accelerated Filer
Smaller 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 registrant's classes of common stock, as of the latest practicable date:
41,630,95241,710,521 Common Shares ($5 par value) as of October 25, 2022.July 28, 2023. 



Table of Contents
TABLE OF CONTENTS
 DescriptionPage
 
  
ITEM 1. 
 
 
 
 
ITEM 2.
ITEM 3.
ITEM 4.
ITEM 1.
ITEM 1A.
ITEM 5.
ITEM 6.
 

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DEFINITIONS
The following abbreviations or acronyms are used in the text.
AGIAMDTAdvanced Grid Infrastructure RiderMeter and Distribution TechnologyOTCMISOOtter Tail CorporationMidcontinent Independent System Operator, Inc.
ARPAlternative Revenue ProgramOTPMPUCOtter Tail Power CompanyMinnesota Public Utilities Commission
BTDBTD Manufacturing, Inc.NDDEQNorth Dakota Department of Environmental Quality
CCSCarbon Capture and SequestrationOTCOtter Tail Corporation
CIPConservation Improvement ProgramOTPOtter Tail Power Company
EGUElectric Generating UnitsPIRPhase-In Rider
EAREITEEnergy AdjustmentIntensive, Trade Exposed RiderPSLRAPrivate Securities Litigation Reform Act of 1995
EPAEnvironmental Protection AgencyPTCProduction Tax Credits
ESSRPExecutive Survivor and Supplemental Retirement PlanPVCPolyvinyl chloride
EUICElectric Utility Infrastructure Cost Recovery RiderRHRRegional Haze Rule
FERCFederal Energy Regulatory CommissionRHRROERegional Haze RuleReturn on equity
GCRGeneration Cost Recovery RiderROEReturn on equity
ISOIndependent System OperatorRRRRenewable Resource Rider
IRPGHGIntegrated Resource PlanGreenhouse GasSECSecurities and Exchange Commission
kwhISOkilowatt-hourSOFRSecured Overnight Funds Rate
MerricourtMerricourt Wind Energy CenterIndependent System OperatorT.O. PlasticsT.O. Plastics, Inc.
MISOkwhMidcontinent Independent System Operator, Inc.kilowatt-hourTCRTransmission Cost Recovery Rider
MPUCMerricourtMinnesota Public Utilities CommissionMerricourt Wind Energy Center
FORWARD-LOOKING INFORMATION
This Quarterly Report on Form 10-Q contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 (the "PSLRA"). When used in this Form 10-Q and in future filings by Otter Tail Corporation (the "Company") with the Securities and Exchange Commission (SEC), in the Company’s press releases and in oral statements, words such as “anticipate,” “believe,” “could,” “estimate,” “expect,” "future," "goal," “intend,” "likely," “may,” “outlook,” “plan,” “possible,” “potential,” "probable," "projected," “should,” "target," “will,” “would” or similar expressions are intended to identify forward-looking statements within the meaning of the PSLRA. Such statements are based on current expectations and assumptions and entail various risks and uncertainties that could cause actual results to differ materially from those expressed in such forward-looking statements. The Company’s risks and uncertainties include, among other things, uncertainty of the impact and duration of the COVID-19 pandemic, uncertainty of future investments and capital expenditures, rate base levels and rate base growth, long-term investment risk, seasonal weather patterns and extreme weather events, counterparty credit risk, future business volumes with key customers, reductions in our credit ratings, our ability to access capital markets on favorable terms, assumptions and costs relating to funding our employee benefit plans, our subsidiaries’ ability to make dividend payments, cyber security threats or data breaches, the impact of government legislation and regulation including foreign trade policy and environmental, health and safety laws and regulations, the impact of climate change including compliance with legislative and regulatory changes to address climate change, operational and economic risks associated with our electric generating and manufacturing facilities, risks associated with energy markets, the availability and pricing of resource materials, inflation rates,cost pressures, attracting and maintaining a qualified and stable workforce, expectations regarding regulatory proceedings, and changing macroeconomic and industry conditions. These and other risks and uncertainties are more fully described in our filings with the SEC, including our most recently filed Annual Report on Form 10-K. Forward-looking statements speak only as of the date they are made, and we expressly disclaim any obligation to update any forward-looking information.
PART I. FINANCIAL INFORMATION
ITEM 1.FINANCIAL STATEMENTS

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OTTER TAIL CORPORATION
CONSOLIDATED BALANCE SHEETS (unaudited)
(in thousands, except share data)(in thousands, except share data)September 30,
2022
December 31,
2021
(in thousands, except share data)June 30,
2023
December 31,
2022
AssetsAssets  Assets  
Current AssetsCurrent Assets  Current Assets  
Cash and Cash EquivalentsCash and Cash Equivalents$72,987 $1,537 Cash and Cash Equivalents$150,578 $118,996 
Receivables, net of allowance for credit lossesReceivables, net of allowance for credit losses193,797 174,953 Receivables, net of allowance for credit losses194,951 144,393 
InventoriesInventories146,376 148,490 Inventories144,441 145,952 
Regulatory AssetsRegulatory Assets29,921 27,342 Regulatory Assets19,058 24,999 
Other Current AssetsOther Current Assets17,412 17,032 Other Current Assets15,084 18,412 
Total Current AssetsTotal Current Assets460,493 369,354 Total Current Assets524,112 452,752 
Noncurrent AssetsNoncurrent AssetsNoncurrent Assets
InvestmentsInvestments52,966 56,690 Investments59,882 54,845 
Property, Plant and Equipment, net of accumulated depreciationProperty, Plant and Equipment, net of accumulated depreciation2,186,643 2,124,605 Property, Plant and Equipment, net of accumulated depreciation2,316,246 2,212,717 
Regulatory AssetsRegulatory Assets116,593 125,508 Regulatory Assets96,128 94,655 
Intangible Assets, net of accumulated amortizationIntangible Assets, net of accumulated amortization8,218 9,044 Intangible Assets, net of accumulated amortization7,393 7,943 
GoodwillGoodwill37,572 37,572 Goodwill37,572 37,572 
Other Noncurrent AssetsOther Noncurrent Assets35,419 32,057 Other Noncurrent Assets52,653 41,177 
Total Noncurrent AssetsTotal Noncurrent Assets2,437,411 2,385,476 Total Noncurrent Assets2,569,874 2,448,909 
Total AssetsTotal Assets$2,897,904 $2,754,830 Total Assets$3,093,986 $2,901,661 
Liabilities and Shareholders' EquityLiabilities and Shareholders' EquityLiabilities and Shareholders' Equity
Current LiabilitiesCurrent LiabilitiesCurrent Liabilities
Short-Term DebtShort-Term Debt$ $91,163 Short-Term Debt$50,197 $8,204 
Current Maturities of Long-Term Debt 29,983 
Accounts PayableAccounts Payable121,995 135,089 Accounts Payable104,661 104,400 
Accrued Salaries and WagesAccrued Salaries and Wages27,454 31,704 Accrued Salaries and Wages26,029 32,327 
Accrued TaxesAccrued Taxes25,635 19,245 Accrued Taxes31,900 19,340 
Regulatory LiabilitiesRegulatory Liabilities21,114 24,844 Regulatory Liabilities41,743 17,300 
Other Current LiabilitiesOther Current Liabilities45,655 55,671 Other Current Liabilities46,032 56,065 
Total Current LiabilitiesTotal Current Liabilities241,853 387,699 Total Current Liabilities300,562 237,636 
Noncurrent LiabilitiesNoncurrent LiabilitiesNoncurrent Liabilities
Pension Benefit LiabilityPension Benefit Liability50,489 73,973 Pension Benefit Liability33,198 33,210 
Other Postretirement Benefits LiabilityOther Postretirement Benefits Liability67,352 66,481 Other Postretirement Benefits Liability47,364 46,977 
Regulatory LiabilitiesRegulatory Liabilities240,545 234,430 Regulatory Liabilities245,935 244,497 
Deferred Income TaxesDeferred Income Taxes212,838 188,268 Deferred Income Taxes231,910 221,302 
Deferred Tax CreditsDeferred Tax Credits16,102 16,661 Deferred Tax Credits15,544 15,916 
Other Noncurrent LiabilitiesOther Noncurrent Liabilities60,942 62,527 Other Noncurrent Liabilities67,093 60,985 
Total Noncurrent LiabilitiesTotal Noncurrent Liabilities648,268 642,340 Total Noncurrent Liabilities641,044 622,887 
Commitments and Contingencies (Note 9)
Commitments and Contingencies (Note 9)
Commitments and Contingencies (Note 9)
CapitalizationCapitalizationCapitalization
Long-Term Debt, net of current maturities823,760 734,014 
Long-Term DebtLong-Term Debt823,941 823,821 
Shareholders' EquityShareholders' EquityShareholders' Equity
Common Shares: 50,000,000 shares authorized, $5 par value; 41,630,952 and 41,551,524 outstanding
at September 30, 2022 and December 31, 2021
208,155 207,758 
Common Shares: 50,000,000 shares authorized, $5 par value; 41,710,521 and 41,631,113 outstanding
at June 30, 2023 and December 31, 2022
Common Shares: 50,000,000 shares authorized, $5 par value; 41,710,521 and 41,631,113 outstanding
at June 30, 2023 and December 31, 2022
208,553 208,156 
Additional Paid-In CapitalAdditional Paid-In Capital422,448 419,760 Additional Paid-In Capital425,867 423,034 
Retained EarningsRetained Earnings560,398 369,783 Retained Earnings693,138 585,212 
Accumulated Other Comprehensive Loss(6,978)(6,524)
Accumulated Other Comprehensive IncomeAccumulated Other Comprehensive Income881 915 
Total Shareholders' EquityTotal Shareholders' Equity1,184,023 990,777 Total Shareholders' Equity1,328,439 1,217,317 
Total CapitalizationTotal Capitalization2,007,783 1,724,791 Total Capitalization2,152,380 2,041,138 
Total Liabilities and Shareholders' EquityTotal Liabilities and Shareholders' Equity$2,897,904 $2,754,830 Total Liabilities and Shareholders' Equity$3,093,986 $2,901,661 
See accompanying notes to consolidated financial statements.
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OTTER TAIL CORPORATION
CONSOLIDATED STATEMENTS OF INCOME (unaudited)
Three Months Ended September 30,Nine Months Ended September 30,Three Months Ended June 30,Six Months Ended June 30,
(in thousands, except per-share amounts)(in thousands, except per-share amounts)2022202120222021(in thousands, except per-share amounts)2023202220232022
Operating RevenuesOperating Revenues  Operating Revenues  
ElectricElectric$142,747 $118,775 $404,112 $348,629 Electric$113,763 $130,949 $265,671 $261,365 
Product SalesProduct Sales241,109 197,519 754,688 514,983 Product Sales223,953 269,091 411,126 513,579 
Total Operating RevenuesTotal Operating Revenues383,856 316,294 1,158,800 863,612 Total Operating Revenues337,716 400,040 676,797 774,944 
Operating ExpensesOperating ExpensesOperating Expenses
Electric Production FuelElectric Production Fuel24,972 17,698 54,538 44,576 Electric Production Fuel14,833 14,714 26,326 29,567 
Electric Purchased PowerElectric Purchased Power19,913 9,878 64,604 40,273 Electric Purchased Power5,212 24,162 47,037 44,691 
Electric Operating and Maintenance ExpensesElectric Operating and Maintenance Expenses39,799 36,465 126,460 114,615 Electric Operating and Maintenance Expenses45,522 42,379 91,070 86,659 
Cost of Products Sold (excluding depreciation)Cost of Products Sold (excluding depreciation)139,361 134,212 443,586 358,767 Cost of Products Sold (excluding depreciation)120,658 152,466 233,027 304,225 
Other Nonelectric ExpensesOther Nonelectric Expenses16,524 16,224 50,981 45,587 Other Nonelectric Expenses16,870 17,252 35,568 34,457 
Depreciation and AmortizationDepreciation and Amortization22,716 22,815 69,829 68,109 Depreciation and Amortization24,232 23,566 48,089 47,113 
Electric Property TaxesElectric Property Taxes4,438 4,474 13,304 13,136 Electric Property Taxes4,336 4,435 8,957 8,866 
Total Operating ExpensesTotal Operating Expenses267,723 241,766 823,302 685,063 Total Operating Expenses231,663 278,974 490,074 555,578 
Operating IncomeOperating Income116,133 74,528 335,498 178,549 Operating Income106,053 121,066 186,723 219,366 
Other Income and Expense
Interest Charges9,259 9,648 27,198 28,601 
Nonservice Cost Components of Postretirement Benefits(52)505 (824)1,511 
Other Income and (Expense)Other Income and (Expense)
Interest ExpenseInterest Expense(9,696)(8,991)(19,111)(17,939)
Nonservice Components of Postretirement BenefitsNonservice Components of Postretirement Benefits2,421 751 4,833 772 
Other Income (Expense), netOther Income (Expense), net(174)203 (802)2,095 Other Income (Expense), net3,253 (889)5,370 (629)
Income Before Income TaxesIncome Before Income Taxes106,752 64,578 308,322 150,532 Income Before Income Taxes102,031 111,937 177,815 201,570 
Income Tax ExpenseIncome Tax Expense22,513 11,824 66,143 25,380 Income Tax Expense20,062 26,000 33,365 43,630 
Net IncomeNet Income$84,239 $52,754 $242,179 $125,152 Net Income$81,969 $85,937 $144,450 $157,940 
Weighted-Average Common Shares Outstanding:Weighted-Average Common Shares Outstanding:Weighted-Average Common Shares Outstanding:
BasicBasic41,600 41,504 41,582 41,487 Basic41,678 41,597 41,655 41,573 
DilutedDiluted41,974 41,869 41,930 41,795 Diluted42,053 41,944 42,035 41,907 
Earnings Per Share:Earnings Per Share:Earnings Per Share:
BasicBasic$2.02 $1.27 $5.82 $3.02 Basic$1.97 $2.07 $3.47 $3.80 
DilutedDiluted$2.01 $1.26 $5.78 $2.99 Diluted$1.95 $2.05 $3.44 $3.77 
See accompanying notes to consolidated financial statements.
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OTTER TAIL CORPORATION
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (unaudited)
Three Months Ended September 30,Nine Months Ended September 30,Three Months Ended June 30,Six Months Ended June 30,
(in thousands)(in thousands)2022202120222021(in thousands)2023202220232022
Net IncomeNet Income$84,239 $52,754 $242,179 $125,152 Net Income$81,969 $85,937 $144,450 $157,940 
Other Comprehensive Income (Loss):Other Comprehensive Income (Loss):Other Comprehensive Income (Loss):
Unrealized Loss on Available-for-Sale Securities, net of tax benefit of $46, $7, $127, and $27(171)(26)(476)(101)
Pension and Other Postretirement Benefits, net of tax expense of $(37), $(51), $(8), and $(154)106 146 22 437 
Unrealized Gain (Loss) on Available-for-Sale Securities, net of tax (expense) benefit of $16, $20, $(5) and $81Unrealized Gain (Loss) on Available-for-Sale Securities, net of tax (expense) benefit of $16, $20, $(5) and $81(61)(74)19 (305)
Pension and Other Postretirement Benefits, net of tax benefit (expense) of $9, $(37), $19 and $29Pension and Other Postretirement Benefits, net of tax benefit (expense) of $9, $(37), $19 and $29(27)106 (53)(84)
Total Other Comprehensive Income (Loss)Total Other Comprehensive Income (Loss)(65)120 (454)336 Total Other Comprehensive Income (Loss)(88)32 (34)(389)
Total Comprehensive IncomeTotal Comprehensive Income$84,174 $52,874 $241,725 $125,488 Total Comprehensive Income$81,881$85,969$144,416$157,551
See accompanying notes to consolidated financial statements.
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OTTER TAIL CORPORATION
CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (unaudited)
(in thousands, except common shares outstanding)(in thousands, except common shares outstanding)Common
Shares
Outstanding
Par Value,
Common
Shares
Additional Paid-In CapitalRetained
Earnings
Accumulated
Other
Comprehensive
Income (Loss)
Total Shareholders' Equity(in thousands, except common shares outstanding)Common
Shares
Outstanding
Par Value,
Common
Shares
Additional Paid-In CapitalRetained
Earnings
Accumulated
Other
Comprehensive
Income (Loss)
Total Shareholders' Equity
Balance, June 30, 202241,630,799 $208,154 $421,951 $493,351 $(6,913)$1,116,543 
Balance, March 31, 2023Balance, March 31, 202341,684,526 $208,423 $424,948 $629,437 $969 $1,263,777 
Stock Issued Under Share-Based Compensation Plans, net of shares withheld for employee taxesStock Issued Under Share-Based Compensation Plans, net of shares withheld for employee taxes153 (1)— — — Stock Issued Under Share-Based Compensation Plans, net of shares withheld for employee taxes25,995 130 (130)— — — 
Stock Issued Under Dividend Reinvestment and Stock Purchase Plans, net of expenses and repurchased shares— — (132)— — (132)
Stock Issued Under Stock Purchase Plan, net of expensesStock Issued Under Stock Purchase Plan, net of expenses— — (167)— — (167)
Net IncomeNet Income— — — 84,239 — 84,239 Net Income— — — 81,969 — 81,969 
Other Comprehensive LossOther Comprehensive Loss— — — — (65)(65)Other Comprehensive Loss— — — — (88)(88)
Stock Compensation ExpenseStock Compensation Expense— — 630 — — 630 Stock Compensation Expense— — 1,216 — — 1,216 
Common Dividends ($0.4125 per share)— — — (17,192)— (17,192)
Balance, September 30, 202241,630,952 $208,155 $422,448 $560,398 $(6,978)$1,184,023 
Common Dividends ($0.4375 per share)Common Dividends ($0.4375 per share)— — — (18,268)— (18,268)
Balance, June 30, 2023Balance, June 30, 202341,710,521 $208,553 $425,867 $693,138 $881 $1,328,439 
Balance, June 30, 202141,538,709 $207,694 $417,870 $297,850 $(8,291)$915,123 
Balance, March 31, 2022Balance, March 31, 202241,605,884 $208,029 $421,449 $424,605 $(6,945)$1,047,138 
Stock Issued Under Share-Based Compensation Plans, net of shares withheld for employee taxesStock Issued Under Share-Based Compensation Plans, net of shares withheld for employee taxes1,275 (132)— — (126)Stock Issued Under Share-Based Compensation Plans, net of shares withheld for employee taxes24,915 125 (105)— — 20 
Net IncomeNet Income— — — 52,754 — 52,754 Net Income— — — 85,937 — 85,937 
Other Comprehensive IncomeOther Comprehensive Income— — — — 120 120 Other Comprehensive Income— — — — 32 32 
Stock Compensation ExpenseStock Compensation Expense— — 830 — — 830 Stock Compensation Expense— — 607 — — 607 
Common Dividends ($0.39 per share)— — — (16,219)— (16,219)
Balance, September 30, 202141,539,984 $207,700 $418,568 $334,385 $(8,171)$952,482 
Common Dividends ($0.4125 per share)Common Dividends ($0.4125 per share)— — — (17,191)— (17,191)
Balance, June 30, 2022Balance, June 30, 202241,630,799 $208,154 $421,951 $493,351 $(6,913)$1,116,543 
Balance, December 31, 2022Balance, December 31, 202241,631,113 $208,156 $423,034 $585,212 $915 $1,217,317 
Stock Issued Under Share-Based Compensation Plans, net of shares withheld for employee taxesStock Issued Under Share-Based Compensation Plans, net of shares withheld for employee taxes79,408 397 (3,485)— — (3,088)
Stock Issued Under Stock Purchase Plan, net of expensesStock Issued Under Stock Purchase Plan, net of expenses— — (166)— — (166)
Net IncomeNet Income— — — 144,450 — 144,450 
Other Comprehensive LossOther Comprehensive Loss— — — — (34)(34)
Stock Compensation ExpenseStock Compensation Expense— — 6,484 — — 6,484 
Common Dividends ($0.875 per share)Common Dividends ($0.875 per share)— — — (36,524)— (36,524)
Balance, June 30, 2023Balance, June 30, 202341,710,521 $208,553 $425,867 $693,138 $881 $1,328,439 
Balance, December 31, 2021Balance, December 31, 202141,551,524 $207,758 $419,760 $369,783 $(6,524)$990,777 Balance, December 31, 202141,551,524 $207,758 $419,760 $369,783 $(6,524)$990,777 
Stock Issued Under Share-Based Compensation Plans, net of shares withheld for employee taxesStock Issued Under Share-Based Compensation Plans, net of shares withheld for employee taxes79,428 397 (3,321)— — (2,924)Stock Issued Under Share-Based Compensation Plans, net of shares withheld for employee taxes79,275 396 (3,320)— — (2,924)
Stock Issued Under Dividend Reinvestment and Stock Purchase Plans, net of expenses and repurchased shares— — (132)— — (132)
Net IncomeNet Income— — — 242,179 — 242,179 Net Income— — — 157,940 — 157,940 
Other Comprehensive LossOther Comprehensive Loss— — — — (454)(454)Other Comprehensive Loss— — — — (389)(389)
Stock Compensation ExpenseStock Compensation Expense— — 6,141 — — 6,141 Stock Compensation Expense— — 5,511 — — 5,511 
Common Dividends ($1.2375 per share)— — — (51,564)— (51,564)
Balance, September 30, 202241,630,952 $208,155 $422,448 $560,398 $(6,978)$1,184,023 
Balance, December 31, 202041,469,879 $207,349 $414,246 $257,878 $(8,507)$870,966 
Stock Issued Under Share-Based Compensation Plans, net of shares withheld for employee taxes70,105 351 (1,965)— — (1,614)
Stock Issued Under Dividend Reinvestment and Stock Purchase Plans, net of expenses and repurchased shares— — (67)— — (67)
Net Income— — — 125,152 — 125,152 
Other Comprehensive Income— — — — 336 336 
Stock Compensation Expense— — 6,354 — — 6,354 
Common Dividends ($1.17 per share)— — — (48,645)— (48,645)
Balance, September 30, 202141,539,984 $207,700 $418,568 $334,385 $(8,171)$952,482 
Common Dividends ($0.825 per share)Common Dividends ($0.825 per share)— — — (34,372)— (34,372)
Balance, June 30, 2022Balance, June 30, 202241,630,799 $208,154 $421,951 $493,351 $(6,913)$1,116,543 
See accompanying notes to consolidated financial statements.
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OTTER TAIL CORPORATION
CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited)
Nine Months Ended September 30,Six Months Ended June 30,
(in thousands)(in thousands)20222021(in thousands)20232022
Operating ActivitiesOperating Activities  Operating Activities  
Net IncomeNet Income$242,179 $125,152 Net Income$144,450 $157,940 
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Depreciation and AmortizationDepreciation and Amortization69,829 68,109 Depreciation and Amortization48,089 47,113 
Deferred Tax CreditsDeferred Tax Credits(558)(558)Deferred Tax Credits(372)(373)
Deferred Income TaxesDeferred Income Taxes23,648 18,835 Deferred Income Taxes8,708 25,160 
Discretionary Contribution to Pension PlanDiscretionary Contribution to Pension Plan(20,000)(10,000)Discretionary Contribution to Pension Plan (20,000)
Allowance for Equity Funds Used During Construction(938)(427)
Investment (Gains) LossesInvestment (Gains) Losses(4,295)4,440 
Stock Compensation ExpenseStock Compensation Expense6,141 6,354 Stock Compensation Expense6,484 5,511 
Other, NetOther, Net5,477 (2,747)Other, Net161 (164)
Changes in Operating Assets and Liabilities:Changes in Operating Assets and Liabilities:Changes in Operating Assets and Liabilities:
ReceivablesReceivables(18,845)(64,800)Receivables(50,558)(50,885)
InventoriesInventories3,632 (22,450)Inventories2,396 2,889 
Regulatory AssetsRegulatory Assets170 5,301 Regulatory Assets7,320 5,604 
Other AssetsOther Assets1,789 (18,708)Other Assets3,561 3,240 
Accounts PayableAccounts Payable(10,681)30,921 Accounts Payable1,037 1,933 
Accrued and Other LiabilitiesAccrued and Other Liabilities(13,970)12,027 Accrued and Other Liabilities(4,271)(3,394)
Regulatory LiabilitiesRegulatory Liabilities(1,208)2,350 Regulatory Liabilities27,169 (3,859)
Pension and Other Postretirement BenefitsPension and Other Postretirement Benefits1,308 5,393 Pension and Other Postretirement Benefits(5,382)475 
Net Cash Provided by Operating ActivitiesNet Cash Provided by Operating Activities287,973 154,752 Net Cash Provided by Operating Activities184,497 175,630 
Investing ActivitiesInvesting ActivitiesInvesting Activities
Capital ExpendituresCapital Expenditures(123,227)(117,312)Capital Expenditures(151,516)(70,791)
Proceeds from Disposal of Noncurrent AssetsProceeds from Disposal of Noncurrent Assets3,803 5,819 Proceeds from Disposal of Noncurrent Assets2,970 2,840 
Cash Used for Investments and Other AssetsCash Used for Investments and Other Assets(8,132)(5,591)Cash Used for Investments and Other Assets(5,079)(5,944)
Net Cash Used in Investing ActivitiesNet Cash Used in Investing Activities(127,556)(117,084)Net Cash Used in Investing Activities(153,625)(73,895)
Financing ActivitiesFinancing ActivitiesFinancing Activities
Net Borrowings (Repayments) on Short-Term Debt(91,163)16,860 
Net Borrowings (Repayments) of Short-Term DebtNet Borrowings (Repayments) of Short-Term Debt41,993 (91,163)
Proceeds from Issuance of Long-Term DebtProceeds from Issuance of Long-Term Debt90,000 — Proceeds from Issuance of Long-Term Debt 90,000 
Payments for Retirement of Long-Term Debt(30,000)(169)
Dividends PaidDividends Paid(51,564)(48,645)Dividends Paid(36,524)(34,372)
Payments for Shares Withheld for Employee Tax ObligationsPayments for Shares Withheld for Employee Tax Obligations(2,942)(1,633)Payments for Shares Withheld for Employee Tax Obligations(3,088)(2,942)
Other, netOther, net(3,298)(3,972)Other, net(1,671)(2,806)
Net Cash Used in Financing Activities(88,967)(37,559)
Net Cash Provided by (Used in) Financing ActivitiesNet Cash Provided by (Used in) Financing Activities710 (41,283)
Net Change in Cash and Cash EquivalentsNet Change in Cash and Cash Equivalents71,450 109 Net Change in Cash and Cash Equivalents31,582 60,452 
Cash and Cash Equivalents at Beginning of PeriodCash and Cash Equivalents at Beginning of Period1,537 1,163 Cash and Cash Equivalents at Beginning of Period118,996 1,537 
Cash and Cash Equivalents at End of PeriodCash and Cash Equivalents at End of Period$72,987 $1,272 Cash and Cash Equivalents at End of Period$150,578 $61,989 
Supplemental Disclosure of Noncash Investing ActivitiesSupplemental Disclosure of Noncash Investing ActivitiesSupplemental Disclosure of Noncash Investing Activities
Accrued Property, Plant and Equipment AdditionsAccrued Property, Plant and Equipment Additions$12,438 $14,358 Accrued Property, Plant and Equipment Additions$13,149 $11,116 
See accompanying notes to consolidated financial statements
7

Table of Contents
OTTER TAIL CORPORATION
CONDENSED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (unaudited)
1. Summary of Significant Accounting Policies
Overview
Otter Tail Corporation (OTC) and its subsidiaries (collectively, the "Company", "us", "our" or "we") form a diverse, multi-platform business consisting of a vertically integrated, regulated utility with generation, transmission and distribution facilities complemented by manufacturing businesses providing metal fabrication for custom machine parts and metal components, manufacturing of extruded and thermoformed plastic products, and manufacturing of polyvinyl chloride (PVC) pipe products. We classify our business into three segments: Electric, Manufacturing and Plastics.
Basis of Presentation
The unaudited consolidated financial statements included herein have been prepared pursuant to the rules and regulations of the SEC for interim reporting. Accordingly, they do not include all the information and footnotes required by generally accepted accounting principles. In the opinion of management, we have included all adjustments, including normal recurring accruals, necessary for a fair presentation of the consolidated financial statements for the periods presented. The consolidated financial statements and condensed notes thereto should be read in conjunction with the consolidated financial statements and notes included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2021.2022.
Because of the seasonality of our businesses and other factors, the earnings for the three and ninesix months ended SeptemberJune 30, 20222023 should not be taken as an indication of earnings for all or any part of the balance of the current year or as an indication of earnings for future years.
Use of Estimates
We use estimates based on the best information available in recording transactions and balances resulting from business operations. As better information becomes available or actual amounts are known, the recorded estimates are revised. Consequently, operating results can be affected by revisions to prior accounting estimates.
Reclassifications
Certain reclassifications of amounts previously reported have been made to the accompanying consolidated statements of shareholders' equity and consolidated statements of cash flows to maintain consistency and comparability between periods presented. Other, net operating cash flows previously reported for the six months ended June 30, 2022, included $4.4 million of investment losses, which are presented separately in the current period, and excluded $0.6 million of allowance for equity funds used during construction, which were previously presented separately. The reclassifications had no impact on previously reported shareholders' equity, net cash provided by operating activities, net cash used in investing activities, net cash used in(used in) provided by financing activities, or cash and cash equivalents.
Concentration of Deposits and Investments
The Company has financial instruments that potentially subject us to a concentration risk, including cash and cash equivalents held in deposit and money market accounts with various financial institutions. These deposits are guaranteed by the Federal Deposit Insurance Corporation up to an insurance limit of $250,000. Currently, our cash and cash equivalents significantly exceed federally insured levels.
2. Segment Information
We classify our business into three segments, Electric, Manufacturing, and Plastics consistent with our business strategy, organizational structure and our internal reporting and review processes used by our chief operating decision maker to make decisions regarding allocation of resources, to assess operating performance and to make strategic decisions.
Certain assets and costs are not allocated to our operating segments. Corporate operating costs include items such as corporate staff and overhead costs, the results of our captive insurance company and other items excluded from the measurement of operating segment performance. Corporate assets consist primarily of cash and cash equivalents, prepaid expenses, investments and fixed assets. Corporate is not an operating segment, rather it is added to operating segment totals to reconcile to consolidated amounts.
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Table of Contents
Information for each segment and our unallocated corporate costs for the three and ninesix months ended SeptemberJune 30, 20222023 and 20212022 are as follows:
Three Months Ended September 30,Nine Months Ended September 30,
(in thousands)2022202120222021
Operating Revenue
Electric$142,747 $118,775 $404,112 $348,629 
Manufacturing98,767 89,977 306,921 250,085 
Plastics142,342 107,542 447,767 264,898 
Total$383,856 $316,294 $1,158,800 $863,612 
Net Income (Loss)
Electric$24,847 $22,528 $62,938 $55,547 
Manufacturing6,219 4,200 17,858 15,290 
Plastics55,982 28,410 170,788 60,102 
Corporate(2,809)(2,384)(9,405)(5,787)
Total$84,239 $52,754 $242,179 $125,152 
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Table of Contents
Three Months Ended June 30,Six Months Ended June 30,
(in thousands)2023202220232022
Operating Revenue
Electric$113,763 $130,949 $265,671 $261,365 
Manufacturing102,475 103,196 209,257 208,154 
Plastics121,478 165,895 201,869 305,425 
Total$337,716 $400,040 $676,797 $774,944 
Net Income (Loss)
Electric$19,634 $18,858 $42,854 $38,091 
Manufacturing5,969 7,555 12,831 11,639 
Plastics55,392 63,959 89,078 114,806 
Corporate974 (4,435)(313)(6,596)
Total$81,969 $85,937 $144,450 $157,940 
The following provides the identifiable assets by segment and corporate assets as of SeptemberJune 30, 20222023 and December 31, 2021:2022:
(in thousands)(in thousands)September 30,
2022
December 31,
2021
(in thousands)June 30,
2023
December 31,
2022
Identifiable AssetsIdentifiable AssetsIdentifiable Assets
ElectricElectric$2,347,461 $2,283,776 Electric$2,446,293 $2,351,961 
ManufacturingManufacturing253,819 251,044 Manufacturing260,050 245,869 
PlasticsPlastics179,925 162,565 Plastics177,470 126,318 
CorporateCorporate116,699 57,445 Corporate210,173 177,513 
TotalTotal$2,897,904 $2,754,830 Total$3,093,986 $2,901,661 
3. Revenue
Presented below are our operating revenues to external customers, in total and by amounts arising from contracts with customers and alternative revenue program (ARP) arrangements, disaggregated by revenue source and segment for the three and ninesix months ended SeptemberJune 30, 20222023 and 2021:2022:
Three Months Ended September 30,Nine Months Ended September 30,Three Months Ended June 30,Six Months Ended June 30,
(in thousands)(in thousands)2022202120222021(in thousands)2023202220232022
Operating RevenuesOperating RevenuesOperating Revenues
Electric SegmentElectric SegmentElectric Segment
Retail: ResidentialRetail: Residential$35,122 $33,902 $108,883 $100,067 Retail: Residential$26,974 $33,011 $70,951 $73,743 
Retail: Commercial and IndustrialRetail: Commercial and Industrial83,022 60,557 232,532 185,376 Retail: Commercial and Industrial64,989 78,521 155,474 149,527 
Retail: OtherRetail: Other2,033 1,979 6,004 5,687 Retail: Other1,752 2,071 3,743 3,972 
Total Retail Total Retail120,177 96,438 347,419 291,130  Total Retail93,715 113,603 230,168 227,242 
TransmissionTransmission13,156 13,300 37,409 37,085 Transmission14,829 11,697 26,936 24,254 
WholesaleWholesale7,196 6,944 13,196 14,711 Wholesale2,670 3,537 4,508 6,000 
OtherOther2,218 2,093 6,088 5,703 Other2,549 2,112 4,059 3,869 
Total Electric SegmentTotal Electric Segment142,747 118,775 404,112 348,629 Total Electric Segment113,763 130,949 265,671 261,365 
Manufacturing SegmentManufacturing SegmentManufacturing Segment
Metal Parts and ToolingMetal Parts and Tooling84,054 76,455 261,923 210,141 Metal Parts and Tooling89,396 88,296 179,463 177,869 
Plastic Products and ToolingPlastic Products and Tooling12,723 10,198 36,584 30,624 Plastic Products and Tooling10,068 11,416 24,211 23,860 
Scrap Metal SalesScrap Metal Sales1,990 3,324 8,414 9,320 Scrap Metal Sales3,011 3,484 5,583 6,425 
Total Manufacturing SegmentTotal Manufacturing Segment98,767 89,977 306,921 250,085 Total Manufacturing Segment102,475 103,196 209,257 208,154 
Plastics SegmentPlastics SegmentPlastics Segment
PVC PipePVC Pipe142,342 107,542 447,767 264,898 PVC Pipe121,478 165,895 201,869 305,425 
Total Operating RevenueTotal Operating Revenue383,856 316,294 1,158,800 863,612 Total Operating Revenue337,716 400,040 676,797 774,944 
Less: Non-contract Revenues Included AboveLess: Non-contract Revenues Included AboveLess: Non-contract Revenues Included Above
Electric Segment - ARP RevenuesElectric Segment - ARP Revenues(548)(33)(7,937)(2,790)Electric Segment - ARP Revenues(334)(4,928)(1,545)(7,388)
Total Operating Revenues from Contracts with CustomersTotal Operating Revenues from Contracts with Customers$384,404 $316,327 $1,166,737 $866,402 Total Operating Revenues from Contracts with Customers$338,050 $404,968 $678,342 $782,332 
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Table of Contents
4. Select Balance Sheet Information
Receivables and Allowance for Credit Losses
Receivables as of SeptemberJune 30, 20222023 and December 31, 20212022 are as follows:
(in thousands)September 30,
2022
December 31,
2021
Receivables
Trade$167,480 $142,297 
Other9,052 10,591 
Unbilled Receivables18,813 23,901 
Total Receivables195,345 176,789 
Less: Allowance for Credit Losses(1,548)(1,836)
Receivables, net of allowance for credit losses$193,797 $174,953 
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Table of Contents
(in thousands)June 30,
2023
December 31,
2022
Receivables
Trade$166,267 $112,126 
Other11,183 9,983 
Unbilled Receivables19,715 23,932 
Total Receivables197,165 146,041 
Less: Allowance for Credit Losses2,214 1,648 
Receivables, net of allowance for credit losses$194,951 $144,393 
The following is a summary of activity in the allowance for credit losses for the ninesix months ended SeptemberJune 30, 20222023 and 2021:2022:
(in thousands)(in thousands)20222021(in thousands)20232022
Beginning Balance, January 1Beginning Balance, January 1$1,836 $3,215 Beginning Balance, January 1$1,648 $1,836 
Additions Charged to ExpenseAdditions Charged to Expense518 177 Additions Charged to Expense1,001 382 
Reductions for Amounts Written Off, Net of RecoveriesReductions for Amounts Written Off, Net of Recoveries(806)(1,060)Reductions for Amounts Written Off, Net of Recoveries(435)(461)
Ending Balance, September 30$1,548 $2,332 
Ending Balance, June 30Ending Balance, June 30$2,214 $1,757 
Inventories
Inventories consist of the following as of SeptemberJune 30, 20222023 and December 31, 2021:2022:
(in thousands)(in thousands)September 30,
2022
December 31,
2021
(in thousands)June 30,
2023
December 31,
2022
Raw Material, Fuel and SuppliesRaw Material, Fuel and Supplies$74,249 $72,882 Raw Material, Fuel and Supplies$73,314 $70,374 
Work in ProcessWork in Process33,765 35,705 Work in Process29,326 31,766 
Finished GoodsFinished Goods38,362 39,903 Finished Goods41,801 43,812 
Total InventoriesTotal Inventories$146,376 $148,490 Total Inventories$144,441 $145,952 
Investments
The following is a summary of our investments as of SeptemberJune 30, 20222023 and December 31, 2021:2022:
(in thousands)(in thousands)September 30,
2022
December 31,
2021
(in thousands)June 30,
2023
December 31,
2022
Corporate-Owned Life Insurance PoliciesCorporate-Owned Life Insurance Policies$37,288 $41,078 Corporate-Owned Life Insurance Policies$39,352 $38,991 
Debt Securities8,710 9,202 
Corporate and Government Debt SecuritiesCorporate and Government Debt Securities8,926 8,761 
Money Market FundsMoney Market Funds1,854 949 Money Market Funds4,069 1,560 
Mutual FundsMutual Funds5,084 5,432 Mutual Funds7,505 5,503 
Other InvestmentsOther Investments30 29 Other Investments30 30 
Total InvestmentsTotal Investments$52,966 $56,690 Total Investments$59,882 $54,845 
The amount of unrealized gains and losses on debt securities as of SeptemberJune 30, 20222023 and December 31, 20212022 was not material and no unrealized losses were deemed to be other-than-temporary. In addition, the amount of unrealized gains and losses on marketable equity securities still held as of SeptemberJune 30, 20222023 and December 31, 20212022 was not material.
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Table of Contents
Property, Plant and Equipment
Major classes of property, plant and equipment as of SeptemberJune 30, 20222023 and December 31, 20212022 include:
(in thousands)(in thousands)September 30,
2022
December 31,
2021
(in thousands)June 30,
2023
December 31,
2022
Electric PlantElectric Plant  Electric Plant  
Electric Plant in ServiceElectric Plant in Service$2,795,649 $2,758,445 Electric Plant in Service$2,933,603 $2,844,379 
Construction Work in ProgressConstruction Work in Progress130,486 74,926 Construction Work in Progress141,249 113,932 
Total Gross Electric PlantTotal Gross Electric Plant2,926,135 2,833,371 Total Gross Electric Plant3,074,852 2,958,311 
Less Accumulated Depreciation and AmortizationLess Accumulated Depreciation and Amortization850,741 817,302 Less Accumulated Depreciation and Amortization888,374 859,988 
Net Electric PlantNet Electric Plant2,075,394 2,016,069 Net Electric Plant2,186,478 2,098,323 
Nonelectric Property, Plant and EquipmentNonelectric Property, Plant and EquipmentNonelectric Property, Plant and Equipment
Nonelectric Property, Plant and Equipment in ServiceNonelectric Property, Plant and Equipment in Service281,584 273,950 Nonelectric Property, Plant and Equipment in Service297,908 293,928 
Construction Work in ProgressConstruction Work in Progress20,746 16,611 Construction Work in Progress34,147 15,170 
Total Gross Nonelectric Property, Plant and EquipmentTotal Gross Nonelectric Property, Plant and Equipment302,330 290,561 Total Gross Nonelectric Property, Plant and Equipment332,055 309,098 
Less Accumulated Depreciation and AmortizationLess Accumulated Depreciation and Amortization191,081 182,025 Less Accumulated Depreciation and Amortization202,287 194,704 
Net Nonelectric Property, Plant and EquipmentNet Nonelectric Property, Plant and Equipment111,249 108,536 Net Nonelectric Property, Plant and Equipment129,768 114,394 
Net Property, Plant and EquipmentNet Property, Plant and Equipment$2,186,643 $2,124,605 Net Property, Plant and Equipment$2,316,246 $2,212,717 
10
On January 3, 2023, we purchased the Ashtabula III wind farm, located in eastern North Dakota, which consists of 39 wind turbines and the related infrastructure, adding 62.4 megawatts of nameplate capacity to our owned generation assets. The total purchase price of the acquisition was $50.6 million. In addition to the acquired assets, we also recognized a $3.3 million asset retirement obligation liability associated with the wind farm and became party to the land easement agreements with the landowners of the wind farm.

Table of Contents
5. Regulatory Matters
Regulatory Assets and Liabilities
The following presents our current and long-term regulatory assets and liabilities as of SeptemberJune 30, 20222023 and December 31, 20212022 and the period we expect to recover or refund such amounts:
Period ofSeptember 30, 2022December 31, 2021Period ofJune 30, 2023December 31, 2022
(in thousands)(in thousands)Recovery/RefundCurrentLong-TermCurrentLong Term(in thousands)Recovery/RefundCurrentLong-TermCurrentLong-Term
Regulatory AssetsRegulatory AssetsRegulatory Assets
Pension and Other Postretirement Benefit Plans1
Pension and Other Postretirement Benefit Plans1
Various$7,791 $110,183 $7,791 $114,961 
Pension and Other Postretirement Benefit Plans1
Various$ $90,602 $— $88,354 
Alternative Revenue Program Riders2
Alternative Revenue Program Riders2
Up to 2 years7,528 1,988 11,889 5,564 
Alternative Revenue Program Riders2
Up to 2 years6,563 79 5,679 2,508 
Asset Retirement Obligations1
Asset Retirement Obligations1
Asset lives— 1,323 — 742 
Asset Retirement Obligations1
Asset lives— 2,327 — 1,467 
Deferred Income TaxesDeferred Income TaxesAsset lives 847 — — 
ISO Cost Recovery Trackers1
ISO Cost Recovery Trackers1
Up to 2 years660 740 — 1,342 
ISO Cost Recovery Trackers1
Up to 2 years288 207 575 314 
Unrecovered Project Costs1
Unrecovered Project Costs1
Up to 5 years320 1,063 2,136 1,455 
Unrecovered Project Costs1
Up to 4 years349 1,048 320 990 
Deferred Rate Case Expenses1
Deferred Rate Case Expenses1
Various412 848 607 1,131 
Deferred Rate Case Expenses1
Up to 3 years377 566 377 754 
Debt Reacquisition Premiums1
10 years25 222 100 240 
Fuel Clause Adjustments1
Fuel Clause Adjustments1
Up to 1 year13,185  4,819 — 
Fuel Clause Adjustments1
Up to 1 year9,935  10,893 — 
Derivative Instruments1
Derivative Instruments1
Up to 2 years1,521 207 7,130 — 
Other1
Other1
Various 226 — 73 
Other1
Various25 245 25 268 
Total Regulatory AssetsTotal Regulatory Assets$29,921 $116,593 $27,342 $125,508 Total Regulatory Assets$19,058 $96,128 $24,999 $94,655 
Regulatory LiabilitiesRegulatory LiabilitiesRegulatory Liabilities
Deferred Income TaxesDeferred Income TaxesAsset lives$ $128,397 $— $129,437 Deferred Income TaxesAsset lives$ $129,567 $— $131,480 
Plant Removal ObligationsPlant Removal ObligationsAsset lives8,526 106,008 8,306 101,595 Plant Removal ObligationsAsset lives8,474 106,393 8,509 105,733 
Fuel Clause AdjustmentsFuel Clause AdjustmentsUp to 1 year  1,554 — Fuel Clause AdjustmentsUp to 1 year22,358  365 — 
Alternative Revenue Program RidersAlternative Revenue Program RidersVarious4,178 6,048 5,772 3,336 Alternative Revenue Program RidersUp to 1 year4,560  2,504 — 
North Dakota PTC RefundsNorth Dakota PTC RefundsAsset lives 9,512 — 7,136 
Pension and Other Postretirement Benefit PlansPension and Other Postretirement Benefit PlansUp to 1 year2,603  2,603 — Pension and Other Postretirement Benefit PlansUp to 1 year5,589  5,589 — 
Derivative InstrumentsVarious5,532  6,214 — 
OtherOtherVarious275 92 395 62 OtherVarious762 463 333 148 
Total Regulatory LiabilitiesTotal Regulatory Liabilities$21,114 $240,545 $24,844 $234,430 Total Regulatory Liabilities$41,743 $245,935 $17,300 $244,497 
1Costs subject to recovery without a rate of return.
1Costs subject to recovery without a rate of return.
1Costs subject to recovery without a rate of return.
2Amount eligible for recovery includes an incentive or rate of return.
2Amount eligible for recovery includes an incentive or rate of return.
2Amount eligible for recovery includes an incentive or rate of return.
Minnesota Rate Case
11
On November 2, 2020, Otter Tail Power Company (OTP) filed an initial request with the Minnesota Public Utilities Commission (MPUC) for an increase in revenue recoverable through base rates in Minnesota, and on December 3, 2020, the MPUC approved an interim annual rate increase

Table of $6.9 million, or 3.2%, effective January 1, 2021.Contents
On February 1, 2022, the MPUC issued its written order on final rates. The key provisions of the order included a revenue requirement of $209.0 million, based on a return on rate base of 7.18% and an allowed return on equity of 9.48% on an equity ratio of 52.5%. The order also authorized recovery of our remaining Hoot Lake Plant net asset over a five-year period and approved the requested decoupling mechanism for most residential and commercial customer rate groups with a cap of 4% of annual base revenues.
On May 12, 2022, OTP's final rate case compliance filing was approved by the MPUC. The filing included final revenue calculations, rate design and resulting tariff revisions, along with a determination of the interim rate refund, which resulted in an increase in revenues during the second quarter of 2022 of $4.1 million. Final rates took effect on July 1, 2022, and interim rate refunds of $15.3 million were applied to customer accounts in the third quarter of 2022.
6. Short-Term and Long-Term Borrowings
The following is a summary of our outstanding short- and long-term borrowings by borrower, OTC or OTP,Otter Tail Power Company (OTP), as of SeptemberJune 30, 20222023 and December 31, 2021:
11

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2022:
Short-Term Debt
The following is a summary of our lines of credit as of SeptemberJune 30, 20222023 and December 31, 2021:2022:
September 30, 2022December 31,
2021
(in thousands)Borrowing LimitAmount OutstandingLetters
of Credit
Amount AvailableAmount Available
OTC Credit Agreement$170,000 $ $ $170,000 $147,363 
OTP Credit Agreement170,000  9,919 160,081 88,315 
Total$340,000 $ $9,919 $330,081 $235,678 
On October 31, 2022, OTC entered into a Fifth Amended and Restated Credit Agreement and OTP entered into a Fourth Amended and Restated Credit Agreement, in each case amending and restating the previously existing credit agreements to extend the maturity date of each credit facility from September 30, 2026 to October 29, 2027, and to replace LIBOR as a benchmark interest rate with the Secured Overnight Finance Rate (SOFR). The adoption of SOFR as a benchmark interest rate is in advance of the scheduled elimination of LIBOR as a benchmark interest rate on June 30, 2023. No other significant terms or conditions, including borrowing capacity, credit spreads or financial covenants, were modified under these amendments and restatements.
June 30, 2023December 31,
2022
(in thousands)Borrowing LimitAmount OutstandingLetters
of Credit
Amount AvailableAmount Available
OTC Credit Agreement$170,000 $ $ $170,000 $170,000 
OTP Credit Agreement170,000 50,197 9,573 110,230 152,223 
Total$340,000 $50,197 $9,573 $280,230 $322,223 
Long-Term Debt
The following is a summary of outstanding long-term debt by borrower as of SeptemberJune 30, 20222023 and December 31, 2021:2022: 
(in thousands)
BorrowerDebt InstrumentRateMaturitySeptember 30,
2022
December 31,
2021
OTCGuaranteed Senior Notes3.55%12/15/26$80,000 $80,000 
OTPSeries 2007B Senior Unsecured Notes6.15%08/20/22 30,000 
OTPSeries 2007C Senior Unsecured Notes6.37%08/02/2742,000 42,000 
OTPSeries 2013A Senior Unsecured Notes4.68%02/27/2960,000 60,000 
OTPSeries 2019A Senior Unsecured Notes3.07%10/10/2910,000 10,000 
OTPSeries 2020A Senior Unsecured Notes3.22%02/25/3010,000 10,000 
OTPSeries 2020B Senior Unsecured Notes3.22%08/20/3040,000 40,000 
OTPSeries 2021A Senior Unsecured Notes2.74%11/29/3140,000 40,000 
OTPSeries 2007D Senior Unsecured Notes6.47%08/20/3750,000 50,000 
OTPSeries 2019B Senior Unsecured Notes3.52%10/10/3926,000 26,000 
OTPSeries 2020C Senior Unsecured Notes3.62%02/25/4010,000 10,000 
OTPSeries 2013B Senior Unsecured Notes5.47%02/27/4490,000 90,000 
OTPSeries 2018A Senior Unsecured Notes4.07%02/07/48100,000 100,000 
OTPSeries 2019C Senior Unsecured Notes3.82%10/10/4964,000 64,000 
OTPSeries 2020D Senior Unsecured Notes3.92%02/25/5015,000 15,000 
OTPSeries 2021B Senior Unsecured Notes3.69%11/29/51100,000 100,000 
OTPSeries 2022A Senior Unsecured Notes3.77%05/20/5290,000 — 
Total$827,000 $767,000 
Less:Current Maturities, Net of Unamortized Debt Issuance Costs 29,983 
Unamortized Long-Term Debt Issuance Costs3,240 3,003 
Total Long-Term Debt, Net of Unamortized Debt Issuance Costs$823,760 $734,014 
On June 10, 2021, OTP entered into a Note Purchase Agreement pursuant to which OTP agreed to issue, in a private placement transaction, $230.0 million of senior unsecured notes consisting of (a) $40.0 million of 2.74% Series 2021A Senior Unsecured Notes due November 29, 2031, (b) $100.0 million of 3.69% Series 2021B Senior Unsecured Notes due November 29, 2051 and (c) $90.0 million of 3.77% Series 2022A Senior Unsecured Notes due May 20, 2052. In November 2021, OTP issued its Series 2021A and Series 2021B Notes for aggregate proceeds of $140.0 million, which were used to repay the Series 2011A Notes in full. In May 2022, OTP issued its Series 2022A Notes for proceeds of $90.0 million, which were used to repay the Series 2007B Senior Unsecured Notes at their maturity in August 2022, to repay short-term borrowings, to fund capital expenditures, and for other general corporate purposes.
(in thousands)
BorrowerDebt InstrumentRateMaturityJune 30,
2023
December 31,
2022
OTCGuaranteed Senior Notes3.55%12/15/26$80,000 $80,000 
OTPSeries 2007C Senior Unsecured Notes6.37%08/02/2742,000 42,000 
OTPSeries 2013A Senior Unsecured Notes4.68%02/27/2960,000 60,000 
OTPSeries 2019A Senior Unsecured Notes3.07%10/10/2910,000 10,000 
OTPSeries 2020A Senior Unsecured Notes3.22%02/25/3010,000 10,000 
OTPSeries 2020B Senior Unsecured Notes3.22%08/20/3040,000 40,000 
OTPSeries 2021A Senior Unsecured Notes2.74%11/29/3140,000 40,000 
OTPSeries 2007D Senior Unsecured Notes6.47%08/20/3750,000 50,000 
OTPSeries 2019B Senior Unsecured Notes3.52%10/10/3926,000 26,000 
OTPSeries 2020C Senior Unsecured Notes3.62%02/25/4010,000 10,000 
OTPSeries 2013B Senior Unsecured Notes5.47%02/27/4490,000 90,000 
OTPSeries 2018A Senior Unsecured Notes4.07%02/07/48100,000 100,000 
OTPSeries 2019C Senior Unsecured Notes3.82%10/10/4964,000 64,000 
OTPSeries 2020D Senior Unsecured Notes3.92%02/25/5015,000 15,000 
OTPSeries 2021B Senior Unsecured Notes3.69%11/29/51100,000 100,000 
OTPSeries 2022A Senior Unsecured Notes3.77%05/20/5290,000 90,000 
Total$827,000 $827,000 
Less:Unamortized Long-Term Debt Issuance Costs3,059 3,179 
Total Long-Term Debt, Net of Unamortized Debt Issuance Costs$823,941 $823,821 
Financial Covenants
Certain of OTC's and OTP's short- and long-term debt agreements require the borrower, whether OTC or OTP, to maintain certain financial covenants, including a maximum debt to total capitalization ratio of 0.60 to 1.00, a minimum interest and dividend coverage ratio of 1.50 to 1.00, and a maximum level of priority indebtedness. As of SeptemberJune 30, 2022,2023, OTC and OTP were in compliance with these financial covenants.
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7. Employee Postretirement Benefits
Pension Plan and Other Postretirement Benefits
The Company sponsors a noncontributory funded pension plan (the "Pension Plan"), an unfunded, nonqualified Executive Survivor and Supplemental Retirement Plan (the "ESSRP"), both accounted for as defined benefit pension plans, and a postretirement healthcare plan accounted for as an other postretirement benefit plan.
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The following tables includetable includes the components of net periodic benefit cost of(income) related to our defined benefit pension plans and other postretirement benefits for the three and ninesix months ended SeptemberJune 30, 20222023 and 2021:2022:
Three Months Ended September 30,Three Months Ended June 30,
Pension Benefits (Pension Plan)Pension Benefits (ESSRP)Postretirement BenefitsPension Benefits (Pension Plan)Pension Benefits (ESSRP)Postretirement Benefits
(in thousands)(in thousands)202220212022202120222021(in thousands)202320222023202220232022
Service CostService Cost$1,644 $1,866 $48 $47 $335 $430 Service Cost$924 $1,644 $18 $49 $153 $334 
Interest CostInterest Cost3,086 2,915 335 307 510 472 Interest Cost4,109 3,086 473 336 669 511 
Expected Return on AssetsExpected Return on Assets(5,921)(5,590) —  — Expected Return on Assets(6,478)(5,921) —  — 
Amortization of Prior Service CostAmortization of Prior Service Cost —  — (1,433)(1,432)Amortization of Prior Service Cost —  — (1,434)(1,434)
Amortization of Net Actuarial LossAmortization of Net Actuarial Loss1,966 2,728 141 154 765 943 Amortization of Net Actuarial Loss 1,967  142  766 
Net Periodic Benefit Cost$775 $1,919 $524 $508 $177 $413 
Net Periodic Benefit Cost (Income)Net Periodic Benefit Cost (Income)$(1,445)$776 $491 $527 $(612)$177 
Nine Months Ended September 30,Six Months Ended June 30,
Pension Benefits (Pension Plan)Pension Benefits (ESSRP)Postretirement BenefitsPension Benefits (Pension Plan)Pension Benefits (ESSRP)Postretirement Benefits
(in thousands)(in thousands)202220212022202120222021(in thousands)202320222023202220232022
Service CostService Cost$4,932 $5,597 $146 $140 $1,004 $1,291 Service Cost$1,849 $3,288 $36 $98 $306 $669 
Interest CostInterest Cost9,258 8,745 1,006 921 1,531 1,418 Interest Cost8,218 6,172 945 671 1,338 1,021 
Expected Return on AssetsExpected Return on Assets(17,763)(16,769) —  — Expected Return on Assets(12,957)(11,842) —  — 
Amortization of Prior Service CostAmortization of Prior Service Cost —  — (4,300)(4,299)Amortization of Prior Service Cost —  — (2,867)(2,867)
Amortization of Net Actuarial LossAmortization of Net Actuarial Loss5,899 8,185 425 465 2,297 2,830 Amortization of Net Actuarial Loss 3,933  284  1,532 
Net Periodic Benefit Cost$2,326 $5,758 $1,577 $1,526 $532 $1,240 
Net Periodic Benefit Cost (Income)Net Periodic Benefit Cost (Income)$(2,890)$1,551 $981 $1,053 $(1,223)$355 
The following table includes the impact of regulation on the recognition of periodic benefit cost (income) arising from pension and other postretirement benefits for the three and ninesix months ended SeptemberJune 30, 20222023 and 2021:2022:
Three Months Ended September 30,Nine Months Ended September 30,Three Months Ended June 30,Six Months Ended June 30,
(in thousands)(in thousands)2022202120222021(in thousands)2023202220232022
Net Periodic Benefit Cost$1,476 $2,840 $4,435 $8,524 
Net Periodic Benefit Cost (Income)Net Periodic Benefit Cost (Income)$(1,566)$1,480 $(3,132)$2,959 
Net Amount Amortized (Deferred) Due to the Effect of RegulationNet Amount Amortized (Deferred) Due to the Effect of Regulation499 823 15 Net Amount Amortized (Deferred) Due to the Effect of Regulation240 (204)490 324 
Net Periodic Benefit Cost Recognized$1,975 $2,848 $5,258 $8,539 
Net Periodic Benefit Cost (Income) RecognizedNet Periodic Benefit Cost (Income) Recognized$(1,326)$1,276 $(2,642)$3,283 
We had no minimum funding requirements for our Pension Plan or any other postretirement benefit plans as of December 31, 2021, but2022. We did not make any contributions to our Pension Plan during the six months ended June 30, 2023. We made a discretionary contribution of $20.0 million to our Pension Plan in Februaryof $20.0 million during the six months ended June 30, 2022.
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8. Income Taxes
The reconciliation of the statutory federal income tax rate to our effective tax rate for each of the three and ninesix months ended SeptemberJune 30, 20222023 and 20212022 is as follows:
Three Months Ended September 30,Nine Months Ended September 30,Three Months Ended June 30,Six Months Ended June 30,
20222021202220212023202220232022
Federal Statutory Rate21.0 %21.0 %21.0 %21.0 %
Income Taxes at Federal Statutory RateIncome Taxes at Federal Statutory Rate$21,426 21.0 %$23,507 21.0 %$37,341 21.0 %$42,330 21.0 %
Increases (Decreases) in Tax from:Increases (Decreases) in Tax from:Increases (Decreases) in Tax from:
State Taxes on Income, Net of Federal TaxState Taxes on Income, Net of Federal Tax5.0 5.0 5.0 5.0 State Taxes on Income, Net of Federal Tax5,104 5.0 5,596 5.0 8,893 5.0 10,078 5.0 
Production Tax Credits (PTCs)Production Tax Credits (PTCs)(3.6)(5.0)(4.1)(6.0)Production Tax Credits (PTCs)(4,574)(4.5)(4,719)(4.2)(9,229)(5.2)(8,686)(4.3)
Amortization of Excess Deferred Income TaxesAmortization of Excess Deferred Income Taxes(0.9)(1.6)(0.7)(2.0)Amortization of Excess Deferred Income Taxes(622)(0.6)99 — (1,420)(0.8)(1,078)(0.5)
North Dakota Wind Tax Credit Amortization, Net of Federal TaxNorth Dakota Wind Tax Credit Amortization, Net of Federal Tax(0.1)(0.2)(0.2)(0.3)North Dakota Wind Tax Credit Amortization, Net of Federal Tax(146)(0.1)(155)(0.1)(310)(0.2)(355)(0.2)
Corporate-Owned Life InsuranceCorporate-Owned Life Insurance0.2 (0.3)0.4 (0.6)Corporate-Owned Life Insurance(460)(0.5)965 0.8 (878)(0.5)1,142 0.6 
Other, NetOther, Net(0.5)(0.6)0.1 (0.2)Other, Net(666)(0.6)707 0.7 (1,032)(0.5)199 — 
Effective Tax Rate21.1 %18.3 %21.5 %16.9 %
Income Tax Expense / Effective Tax RateIncome Tax Expense / Effective Tax Rate$20,062 19.7 %$26,000 23.2 %$33,365 18.8 %$43,630 21.6 %
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9. Commitments and Contingencies
Commitments
Ashtabula III Purchase.Land Easements. On June 23, 2022, OTP exercised its option to acquire the Ashtabula III wind farm, a 62.4 megawatt wind farm located in eastern North Dakota, for $49.7 million, subject to certain closing adjustments. Since 2013, OTP hashad purchased the wind-generated electricity from the Ashtabula III wind farm pursuant to a power purchase power agreement, and thatagreement. That agreement granted OTPus the option to purchase the wind farm. Thefarm and on January 3, 2023, we completed the purchase has received regulatory approval. We anticipatefor $50.6 million. In connection with the transaction will close, subjectpurchase, we assumed 51 land easements, not classified as leases, which require annual payments. As of June 30, 2023, the remaining payments to certain customary closing conditions, in January 2023.be made under the easements total $4.1 million and the remaining terms of the agreements extend into 2034.
Contingencies
FERC ROE.Return on Equity (ROE). In November 2013 and February 2015, customers filed complaints with the Federal Energy Regulatory Commission (FERC) seeking to reduce the return on equity (ROE) component of the transmission rates that Midcontinent Independent System Operator, Inc. (MISO) transmission owners, including OTP, may collect under the MISO tariff rate. FERC's most recent order, issued on November 19, 2020, adopted a revised ROE methodology and set the base ROE at 10.02% (10.52% with an adder) effective for the fifteen-month period from November 2013 to February 2015 and on a prospective basis beginning in September 2016. The order also dismissed any complaints covering the period from February 2015 to May 2016. On August 9, 2022, the U.S. Court of Appeals for the District of Columbia Circuit vacated the FERC order citing a lack of reasoned explanation by FERC in its adoption of its revised ROE methodology as outlined in its November 2020 order. The U.S. Court of Appeals remanded the matter to FERC to reopen the proceedings.
Significant uncertainty exists as to how FERC will proceed upon remand and there is no prescribed timeline under which FERC must act. We have deferred recognition and recorded a refund liability of $2.5$2.7 million as of SeptemberJune 30, 2022.2023. This refund liability reflects our best estimate of amounts previously collected from customers under the MISO tariff rate that may be required to be refunded to customers once all regulatory and judicial proceedings are complete and a final ROE is established for the periods outlined above.
Regional Haze Rule (RHR). The RHR was adopted in an effort to improve visibility in national parks and wilderness areas. The RHR requires states, in coordination with the Environmental Protection Agency (EPA) and other governmental agencies, to develop and implement plans to achieve natural visibility conditions. The second RHR implementation period covers the years 2018-2028. States are required to submit a state implementation plan to assess reasonable progress with the RHR and determine what additional emission reductions are appropriate, if any.
Coyote Station, OTP's jointly owned coal-fired power plant in North Dakota, is subject to assessment in the second implementation period under the North Dakota state implementation plan. The North Dakota Department of Environmental Quality (NDDEQ) submitted its state implementation plan to the EPA for approval in August, 2022. In its plan, the NDDEQ concluded it is not reasonable to require additional emission controls during this planning period. The EPA has previously expressed disagreement with the NDDEQ's recommendation to forgo additional emission controls and has indicated that such a plan is not likely to be accepted.
We cannot predict with certainty the impact the state implementation plan may have on our business until the state implementation plan has been approved or otherwise acted on by the EPA. However, significant emission control investments could be required and the recovery of such costs from customers would require regulatory approval. Alternatively, investments in emission control equipment may prove to be uneconomic and result in the early retirement of or the sale of our interest in Coyote Station, subject to regulatory approval. We cannot estimate the ultimate financial effects such a retirement or sale may have on our consolidated operating results, financial position or cash flows, but such amounts could be material and the recovery of such costs in rates would be subject to regulatory approval.
Self-Funding of Transmission Upgrades. The FERChas granted transmission owners within MISO the unilateral authority to determine the funding mechanism for interconnection transmission upgrades that are necessary to accommodate new generation facilities connecting to the electrical grid. Under existing FERC orders, transmission owners can unilaterally determine whether the generator pays the transmission owner in advance for the transmission upgrade or, alternatively, the transmission owner can elect to fund the upgrade and recover over time from the generator the cost of and a return on the upgrade investment (a self-funding). FERC’s orders granting transmission owners this unilateral funding authority has been judicially contested on the basis that transmission owners may be motivated to discriminate among generators in making funding determinations. In the most recent judicial proceedings, the petitioners argued to the U.S. Court of Appeals for the District of Columbia that FERC did not comply with a previous judicial order to fully develop a record regarding the risk of discrimination and the financial risk absorbed by transmission owners for generator-funded upgrades. On December 2, 2022, the Court of Appeals ruled in favor of the petitioners remanding the matter to FERC, instructing the agency to adequately explain the basis of its orders. The Court of Appeals decision did not vacate transmission owners’ unilateral funding authority.
OTP, as a transmission owner in MISO, has exercised its authority and elected to self-fund previous transmission upgrades necessary to accommodate new system generation. Under such an election, OTP is recovering the cost of the transmission upgrade and a return on that investment from the generator over a contractual period of time. Should FERC, on remand from the Court of Appeals, eliminate transmission owners’ unilateral funding authority, on either a prospective or retrospective basis, our financial results would be impacted. We cannot at this time reasonably predict the outcome of this matter given the uncertainty as to how and when FERC may respond to the judicial remand.
Other Contingencies. We are party to litigation and regulatory matters arising in the normal course of business. We regularly analyze relevant information and, as necessary, estimate and record accrued liabilities for legal, regulatory enforcement and other matters in which a loss is probable of occurring and can be reasonably estimated. We believe the effect on our consolidated operating results, financial position and cash flows, if any, for the disposition of all matters pending as of SeptemberJune 30, 2022,2023, other than those discussed above, will not be material.
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10. Stockholders' Equity
Registration Statements
On May 3, 2021, we filed a shelf registration statement with the SEC under which we may offer for sale, from time to time, either separately or together in any combination, equity, debt or other securities described in the shelf registration statement. No new debt or equity has been issued pursuant to the registration statement. The registration statement expires in May 2024.
On May 3, 2021, we filed a second registration statement with the SEC for the issuance of up to 1,500,000 common shares under an Automatic Dividend Reinvestment and a Share Purchase Plan, which provides shareholders, retail customers of OTP and other interested investors methods of purchasing our common shares, by reinvesting their dividends or making optional cash investments. Shares purchased under the plan may be newly issued common shares or common shares purchased on the open market. During the ninesix months ended SeptemberJune 30, 2022,2023, we issued 97,04656,311 shares under this plan. We repurchased a sufficient number of shares on the open market to satisfy issuance under the plan; accordingly, no proceeds from the issuance were received. As of SeptemberJune 30, 2022,2023, there were 1,287,7741,194,682 shares available for purchase or issuance under the plan. The registration statement expires in May 2024.
Dividend Restrictions
OTC is a holding company with no significant operations of its own. The primary source of funds for payments of dividends to OTC's shareholders is from dividends paid or distributions made by OTC's subsidiaries. As a result of certain statutory limitations or regulatory or financing agreements, the amount of distributions allowed to be made by OTC's subsidiaries or the amount of dividends paid by OTC could be restricted. Both the OTC Credit Agreement and OTP Credit Agreement contain restrictions on the payment of cash dividends upon a default or event of default, including failure to maintain certain financial covenants. As of SeptemberJune 30, 2022,2023, we were in compliance with these financial covenants.
Under the Federal Power Act, a public utility may not pay dividends from any funds properly included in a capital account. What constitutes “funds properly included in a capital account” is undefined in the Federal Power Act or the related regulations; however, the FERC has consistently interpreted the provision to allow dividends to be paid as long as i) the source of the dividends is clearly disclosed, ii) the dividend is not excessive and iii) there is no self-dealing on the part of corporate officials.
The MPUCMinnesota Public Utilities Commission (MPUC) indirectly limits the amount of dividends OTP can pay to OTC by requiring an equity-to-total-capitalization ratio between 48.0%47.5% and 58.7%58.0% based on OTP’s capital structure petition effective by order of the MPUC on January 26,November 8, 2022. As of SeptemberJune 30, 2022,2023, OTP’s equity-to-total-capitalization ratio, including short-term debt, was 54.9%53.8% and its net assets restricted from distribution totaled approximately $686.6$778.6 million. Under the MPUC order, total capitalization for OTP cannot exceed $1.7$1.8 billion.
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11. Accumulated Other Comprehensive Income (Loss)
The following showspresents the changes in accumulated other comprehensive loss for the three and ninesix months ended SeptemberJune 30, 20222023 and 2021:2022:
Three Months Ended September 30,Three Months Ended June 30,
2022202120232022
(in thousands)(in thousands)Pension and Other Postretirement BenefitsNet Unrealized Gains (Losses) on Available-for-Sale SecuritiesTotalPension and Other Postretirement BenefitsNet Unrealized Gains (Losses) on Available-for-Sale SecuritiesTotal(in thousands)Pension and Other Postretirement BenefitsNet Unrealized Gains (Losses) on Available-for-Sale SecuritiesTotalPension and Other Postretirement BenefitsNet Unrealized Gains (Losses) on Available-for-Sale SecuritiesTotal
Balance, Beginning of PeriodBalance, Beginning of Period$(6,621)$(292)$(6,913)$(8,425)$134 $(8,291)Balance, Beginning of Period$1,308 $(339)$969 $(6,727)$(218)$(6,945)
Other Comprehensive Loss Before Reclassifications, net of taxOther Comprehensive Loss Before Reclassifications, net of tax (172)(172)— (26)(26)Other Comprehensive Loss Before Reclassifications, net of tax (62)(62)— (75)(75)
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)106 (1)1 (2)107 146 (1)— (2)146 Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)(27)(1)1 (2)(26)106 (1)(2)107 
Total Other Comprehensive Income (Loss)Total Other Comprehensive Income (Loss)106 (171)(65)146 (26)120 Total Other Comprehensive Income (Loss)(27)(61)(88)106 (74)32 
Balance, End of PeriodBalance, End of Period$(6,515)$(463)$(6,978)$(8,279)$108 $(8,171)Balance, End of Period$1,281 $(400)$881 $(6,621)$(292)$(6,913)
Nine Months Ended September 30,Six Months Ended June 30,
2022202120232022
(in thousands)(in thousands)Pension and Other Postretirement BenefitsNet Unrealized Gains (Losses) on Available-for-Sale SecuritiesTotalPension and Other Postretirement BenefitsNet Unrealized Gains (Losses) on Available-for-Sale SecuritiesTotal(in thousands)Pension and Other Postretirement BenefitsNet Unrealized Gains (Losses) on Available-for-Sale SecuritiesTotalPension and Other Postretirement BenefitsNet Unrealized Gains (Losses) on Available-for-Sale SecuritiesTotal
Balance, Beginning of PeriodBalance, Beginning of Period$(6,537)$13 $(6,524)$(8,716)$209 $(8,507)Balance, Beginning of Period$1,334 $(419)$915 $(6,537)$13 $(6,524)
Other Comprehensive Loss Before Reclassifications, net of tax (477)(477)— (58)(58)
Other Comprehensive Income (Loss) Before Reclassifications, net of taxOther Comprehensive Income (Loss) Before Reclassifications, net of tax 18 18 — (306)(306)
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)22 (1)1 (2)23 437 (1)(43)(2)394 Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)(53)(1)1 (2)(52)(84)(1)(2)(83)
Total Other Comprehensive Income (Loss)Total Other Comprehensive Income (Loss)22 (476)(454)437 (101)336 Total Other Comprehensive Income (Loss)(53)19 (34)(84)(305)(389)
Balance, End of PeriodBalance, End of Period$(6,515)$(463)$(6,978)$(8,279)$108 $(8,171)Balance, End of Period$1,281 $(400)$881 $(6,621)$(292)$(6,913)
(1) Included in the computation of net periodic pension and other postretirement benefit costs. See Note 7.
(1) Included in the computation of net periodic pension and other postretirement benefit costs. See Note 7.
(1) Included in the computation of net periodic pension and other postretirement benefit costs. See Note 7.
(2) Included in other income (expense), net on the accompanying consolidated statements of income.
(2) Included in other income (expense), net on the accompanying consolidated statements of income.
(2) Included in other income (expense), net on the accompanying consolidated statements of income.
12. Share-Based Payments
Stock Compensation Expense
Stock-based compensation expense arising from our employee stock purchase plan and share-based compensation plans recognized within operating expenses in the consolidated statements of income amounted to $0.6$1.2 million and $0.8$0.6 million for the three months ended SeptemberJune 30, 20222023 and 2021,2022, respectively, and $6.1$6.5 million and $6.4$5.5 million for the ninesix months ended SeptemberJune 30, 20222023 and 2021,2022, respectively.
Restricted Stock Awards. We grant restricted stock awards to members of our Board of Directors and restricted stock units to certain key employees. The awards vest, depending on award type and recipient, either ratably over periods of three or four years or cliff vest after four years. Vesting is accelerated in certain circumstances, including on retirement.
The following is a summary of stock award activity for the ninesix months ended SeptemberJune 30, 2022:2023:
SharesWeighted Average
Grant-Date
Fair Value
SharesWeighted-Average
Grant-Date
Fair Value
Nonvested, January 1, 2022138,093 $44.48 
Nonvested, January 1, 2023Nonvested, January 1, 2023141,551 $49.83 
GrantedGranted51,439 59.96 Granted55,205 68.03 
VestedVested(47,981)45.30 Vested(45,493)50.02 
ForfeitedForfeited— — Forfeited(1,300)50.00 
Nonvested, September 30, 2022141,551 $49.83 
Nonvested, June 30, 2023Nonvested, June 30, 2023149,963 $56.47 
The fair value of vested awards was $3.0$3.1 million and $2.1$3.0 million during the ninesix months ended SeptemberJune 30, 20222023 and 2021, respectively.2022.
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Stock Performance Awards. Stock performance awards are granted to executive officers and certain other key employees. The awards vest at the end of a three-year performance period. The number of common shares awarded, if any, at the end of the performance period ranges from zero to 150% of the target amount based on two performance measures: i) total shareholder return relative to a peer group and ii) return on equity. Vesting of the awards is accelerated in certain circumstances, including on retirement. The amountnumber of common shares awarded on an accelerated vesting is based either on actual performance at the end of the performance period or the amountnumber of common shares earned at target.
The grant date fair value of stock performance awards granted during the ninesix months ended SeptemberJune 30, 20222023 and 20212022 was determined using a Monte Carlo fair value simulation model incorporating the following assumptions:
2022202120232022
Risk-free interest rateRisk-free interest rate1.52 %0.18 %Risk-free interest rate4.15 %1.52 %
Expected term (in years)Expected term (in years)3.003.00Expected term (in years)33
Expected volatilityExpected volatility32.00 %32.00 %Expected volatility34.00 %32.00 %
Dividend yieldDividend yield2.90 %3.60 %Dividend yield2.50 %2.90 %
The risk-free interest rate was derived from yields on U.S. government bonds of a similar term. The expected term of the award is equal to the three-year performance period. Expected volatility was estimated based on actual historical volatility of our common stock. Dividend yield was estimated based on historichistorical and future yield estimates.
The following is a summary of stock performance award activity for the ninesix months ended SeptemberJune 30, 20222023 (share amounts reflect awards at target):
SharesWeighted Average
Grant-Date
Fair Value
SharesWeighted-Average
Grant-Date
Fair Value
Nonvested, January 1, 2022189,600 $42.54 
Nonvested, January 1, 2023Nonvested, January 1, 2023189,800 $45.95 
GrantedGranted55,800 54.91 Granted59,400 61.97 
VestedVested(55,600)43.30 Vested(55,000)47.79 
ForfeitedForfeited— — Forfeited— — 
Nonvested, September 30, 2022189,800 $45.95 
Nonvested, June 30, 2023Nonvested, June 30, 2023194,200 $50.33 
The fair value of vested awards was $5.1$5.3 million and $2.5$5.1 million during the ninesix months ended SeptemberJune 30, 20222023 and 2021,2022, respectively.
13. Earnings Per Share
The numerator used in the calculation of both basic and diluted earnings per common share is net income. The denominator used in the calculation of basic earnings per common share is the weighted averageweighted-average number of common shares outstanding during the period. The denominator used in the calculation of diluted earnings per common share is derived by adjusting basic shares outstanding for the dilutive effect of potential common shares outstanding, which consist of time and performance basedperformance-based stock awards and employee stock purchase plan shares.
The following includes the computation of the denominator for basic and diluted weighted-average shares outstanding for the three and ninesix months ended SeptemberJune 30, 20222023 and 2021:2022:
Three Months Ended September 30,Nine Months Ended September 30,Three Months Ended June 30,Six Months Ended June 30,
(in thousands)(in thousands)2022202120222021(in thousands)2023202220232022
Weighted Average Common Shares Outstanding – Basic41,600 41,504 41,582 41,487 
Weighted-Average Common Shares Outstanding – BasicWeighted-Average Common Shares Outstanding – Basic41,678 41,597 41,655 41,573 
Effect of Dilutive Securities:Effect of Dilutive Securities:Effect of Dilutive Securities:
Stock Performance AwardsStock Performance Awards276 262 251 209 Stock Performance Awards281 259 281 239 
Restricted Stock AwardsRestricted Stock Awards97 88 96 82 Restricted Stock Awards92 85 97 94 
Employee Stock Purchase Plan Shares and OtherEmployee Stock Purchase Plan Shares and Other1 15 1 17 Employee Stock Purchase Plan Shares and Other2 2 
Dilutive Effect of Potential Common SharesDilutive Effect of Potential Common Shares374 365 348 308 Dilutive Effect of Potential Common Shares375 347 380 334 
Weighted Average Common Shares Outstanding – Diluted41,974 41,869 41,930 41,795 
Weighted-Average Common Shares Outstanding – DilutedWeighted-Average Common Shares Outstanding – Diluted42,053 41,944 42,035 41,907 
The amountnumber of shares excluded from diluted weighted-average common shares outstanding because such shares were anti-dilutive was not material for the three and ninesix months ended SeptemberJune 30, 20222023 and 2021.2022.
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14. Derivative Instruments
OTP enters into derivative instruments to manage its exposure to future market energy price variability and reduce volatility in prices for our retail customers. These derivative instruments are not designated as qualifying hedging transactions but provide for an economic hedge against future market energy price variability. The instruments are recorded at fair value on the consolidated balance sheets. In accordance with rate-making and cost recovery processes, we recognize a regulatory asset or liability to defer losses or gains from derivative activity until settlement of the associated derivative instrument.
As of SeptemberJune 30, 2022,2023, OTP had multiple outstanding pay-fixed, receive-variable swap agreements with an aggregate notional amount of 156,800195,400 megawatt-hours of electricity, which will be settled periodically throughout 2022 and 2023.with various settlement dates extending to December 31, 2024. As of SeptemberJune 30, 2022,2023, the fair value of these derivative instruments was $5.4$1.7 million, of which $5.5$1.5 million is included in other current assetsliabilities and $0.1$0.2 million which is included in other noncurrent liabilities, on the consolidated balance sheets. As of December 31, 2021,2022, the fair value of these types of derivative contracts was $6.2$7.1 million, which is included in other current assets. Noliabilities. There were no contracts settledwhich matured during the three months ended SeptemberJune 30, 2023 or 2022. During the ninesix months ended SeptemberJune 30, 2023 and 2022, contracts matured and were settled in an aggregate amount of a $16.0 million loss and a $2.8 million. There were no contracts settled duringmillion gain, respectively. Gains and losses recognized on the threesettlement of derivative instruments are recorded in electric purchased power in the consolidated statements of income. Such settlement gains and losses are returned to or nine months ended September 30, 2021.recovered from our electric customers through fuel recovery mechanisms in each state.
15. Fair Value Measurements
The following tables present our assets and liabilities measured at fair value on a recurring basis as of SeptemberJune 30, 20222023 and December 31, 20212022 classified by the input method used to measure fair value:
(in thousands)(in thousands)Level 1Level 2Level 3(in thousands)Level 1Level 2Level 3
September 30, 2022
June 30, 2023June 30, 2023
Assets:Assets:Assets:
Investments:Investments:Investments:
Money Market FundsMoney Market Funds$1,854 $ $ Money Market Funds$4,069 $ $ 
Mutual FundsMutual Funds5,084   Mutual Funds7,505   
Corporate Debt SecuritiesCorporate Debt Securities 1,424  Corporate Debt Securities 1,456  
Government-Backed and Government-Sponsored Enterprises’ Debt SecuritiesGovernment-Backed and Government-Sponsored Enterprises’ Debt Securities 7,286  Government-Backed and Government-Sponsored Enterprises’ Debt Securities 7,470  
Derivative Instruments 5,532  
Total AssetsTotal Assets$6,938 $14,242 $ Total Assets$11,574 $8,926 $ 
Liabilities:Liabilities:Liabilities:
Derivative InstrumentsDerivative Instruments$ $169 $ Derivative Instruments$ $1,728 $ 
Total LiabilitiesTotal Liabilities$ $169 $ Total Liabilities$ $1,728 $ 
December 31, 2021
December 31, 2022December 31, 2022
Assets:Assets:Assets:
Investments:Investments:Investments:
Money Market FundsMoney Market Funds$949 $— $— Money Market Funds$1,560 $— $— 
Mutual FundsMutual Funds5,432 — — Mutual Funds5,503 — — 
Corporate Debt SecuritiesCorporate Debt Securities— 1,333 — Corporate Debt Securities— 1,434 — 
Government-Backed and Government-Sponsored Enterprises’ Debt SecuritiesGovernment-Backed and Government-Sponsored Enterprises’ Debt Securities— 7,869 — Government-Backed and Government-Sponsored Enterprises’ Debt Securities— 7,327 — 
Total AssetsTotal Assets$7,063 $8,761 $— 
Liabilities:Liabilities:
Derivative InstrumentsDerivative Instruments— 6,214 — Derivative Instruments— 7,130 — 
Total Assets$6,381 $15,416 $— 
Total LiabilitiesTotal Liabilities$— $7,130 $— 
Level 1 fair value measurements are based on quoted prices (unadjusted) in active markets for identical assets or liabilities that we have the ability to access at the measurement date.
The level 2 fair value measurements for government-backed and government-sponsored enterprises and corporate debt securities are determined based on the basis of valuations provided by a third-party pricing service which utilizes industry accepted valuation models and observable market inputs to determine valuation. Some valuations or model inputs used by the pricing service may be based on broker quotes.
The level 2 fair value measurements for derivative instruments are determined by using inputs such as forward electric commodity prices, adjusted for location differences. These inputs are observable in the marketplace throughout the full term of the instrument, can be derived from observable data, or are supported by observable levels at which transactions are executed in the marketplace.
In addition to assets recorded at fair value on a recurring basis, we also hold financial instruments that are not recorded at fair value in the consolidated balance sheets but for which disclosure of the fair value of these financial instruments is provided.
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The following reflects the carrying value and estimated fair value of these assets and liabilities as of SeptemberJune 30, 20222023 and December 31, 2021:2022:
September 30, 2022December 31, 2021 June 30, 2023December 31, 2022
(in thousands)(in thousands)Carrying
Amount
Fair ValueCarrying
Amount
Fair Value(in thousands)Carrying
Amount
Fair ValueCarrying
Amount
Fair Value
Assets:Assets:Assets:
Cash and Cash EquivalentsCash and Cash Equivalents$72,987 $72,987 $1,537 $1,537 Cash and Cash Equivalents$150,578 $150,578 $118,996 $118,996 
TotalTotal72,987 72,987 1,537 1,537 Total150,578 150,578 118,996 118,996 
Liabilities:Liabilities:Liabilities:
Short-Term DebtShort-Term Debt  91,163 91,163 Short-Term Debt50,197 50,197 8,204 8,204 
Long-Term DebtLong-Term Debt823,760 679,360 763,997 878,272 Long-Term Debt823,941 698,831 823,821 681,615 
TotalTotal$823,760 $679,360 $855,160 $969,435 Total$874,138 $749,028 $832,025 $689,819 
The following methods and assumptions were used to estimate the fair value of each class of financial instruments for which it is practicable to estimate that value:
Cash Equivalents: The carrying amount approximates fair value because of the short-term maturity of those instruments.
Short-Term Debt: The carrying amount approximates fair value because the debt obligations are short-term and the balances outstanding are subject to variable rates of interest which reset frequently, a Level 2 fair value input.
Long-Term Debt: The fair value of long-term debt is estimated based on current market indications for borrowings of similar maturities, a Level 2 fair value input.
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ITEM 2.MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
You should read the following discussion and analysis of our financial condition and results of operations together with our interim financial statements and the related notes appearing under Item 1 of this Quarterly Report on Form 10-Q, and our annual financial statements and the related notes along with the discussion and analysis of our financial condition and results of operations contained in our Annual Report on Form 10-K for the year ended December 31, 2021.2022.
Otter Tail Corporation and its subsidiaries form a diverse group of businesses with operations classified into three segments: Electric, Manufacturing and Plastics. Our Electric segment business is a vertically integrated, regulated utility with generation, transmission and distribution facilities to serve our customers in western Minnesota, eastern North Dakota and northeastern South Dakota. Our Manufacturing segment provides metal fabrication for custom machine parts and metal components and manufactures extruded and thermoformed plastic products. Our Plastics segment manufactures PVC pipe for use in, among other applications, municipal and rural water, wastewater and water reclamation projects.
STEEL AVAILABILITY AND PRICING
Steel is a key material input to BTD Manufacturing, Inc. (BTD), our metal fabrication business within our Manufacturing segment. Steel prices increased rapidly throughout 2021, peaking in the fourth quarter at historically high levels. Steel prices have been highly volatile in 2022, but began to steadily decline at the end of the second quarter and continued to decline throughout the third quarter. The increase in steel prices in the first half of 2022 led to increased sale prices for our products at BTD as we passed along material cost increases to our customers. Consistent with steel prices, scrap metal prices also increased throughout 2021 and remained elevated in the first half of 2022, positively impacting our financial results during this period, but began to decline at the end of the second quarter and declined sharply in the third quarter of 2022. We expect steel and scrap metal prices to decline modestly in the fourth quarter of 2022 and be near historical levels by the end of the year.
PVC PIPE SUPPLY AND DEMAND CONDITIONS
Extraordinary supply and demand conditions in the PVC industry beginning in 2021 have led to a significant expansion in operating margins and elevated earnings in our Plastics segment. Periodic disruptions in the supply of resin, is the primary material input of the PVC pipe manufactured by our Plastics segment businesses. Resin supply disruptions throughout 2021, along with robust domestic and global demand for PVC resin, led to significantly increased resin prices. Supply disruptions for resin and other additives and ingredients used in the manufacturing process also resultedof PVC pipe, coupled with robust demand for resin, led to a significant increase in reduced manufacturingthe cost of resin over the last two years. Low industry volumes of PVC pipe and low pipe inventories across the industry. This combination of disrupted raw material supply and the resulting low PVC pipe inventories along with robust end market demand for PVC pipethe product led to rapidly increasing salea rapid and significant increase in sales prices for PVC pipe, throughout 2021 and the first half of 2022. The increase in sale prices has outpacedsignificantly outpacing the increase in PVC resin input costs, leading to expanding gross profit margins. Beginning in the third quarter of 2022, demandwidening margins within our Plastics segment.
Demand for PVC pipe began to declinesoften in the second half of 2022 and softening demand continued through the first half of 2023 as multiple, larger than anticipated, resin price reductions caused PVC pipe distributors and contractors to reducehave reduced purchase volumes in an effortresponse to reduce inventory levels.uncertain and competitive market conditions. Resin prices have declined over this time frame but sales prices for PVC pipe remain elevated, continuing to produce expanded operating margins.
TheThese unique market dynamics experienced byimpacting our Plastics segment businesses in 2021 and thus far in 2022 have resulted in a significant increase in earnings in 2022 compared to prior periods. We currently expect earnings of our Plastics segment to remain elevated relativein 2023 compared to historicalpre-2021 levels, through the end of 2022 and into 2023, but as the industry supply and demand conditions normalize, we expect segment earnings to normalize in the last half of 2024.
STEEL PRICING
Volatility in the price of steel, a key material input to our Manufacturing segment, significantly impacted our operating results in the last two years. Steel prices were elevated at the beginning of 2022 but began to steadily decline at the end of the second quarter and returned to near historical levels by the end of the year. Elevated steel prices led to increased sales prices in 2024.2022 for our products at BTD Manufacturing, Inc. (BTD), our metal fabrication business within our Manufacturing segment, as we passed along material cost increases to our customers. Steel prices in the first half of 2023 had significantly declined from the same period in the previous year, impacting our comparative operating results.
The marketplace dynamics impacting both our Manufacturing and Plastics segments are fluid and subject to change whichand may impact our operating results prospectively.
RESULTS OF OPERATIONS – QUARTER TO DATE
Provided below is a summary and discussion of our operating results on a consolidated basis followed by a discussion of the operating results of each of our segments: Electric, Manufacturing and Plastics. In addition to the segment results, we provide an overview of our Corporate costs. Our Corporate costs do not constitute a reportable segment, but rather consist of unallocated general corporate expenses, such as corporate staff and overhead costs, the results of our captive insurance company and other items excluded from the measurement of segment performance. Corporate costs are added to operating segment totals to reconcile to totals on our consolidated statements of income.
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CONSOLIDATED RESULTS    
The following table summarizes consolidated operating results for the three months ended SeptemberJune 30, 20222023 and 2021:2022:
(in thousands)(in thousands)20222021$ change% change(in thousands)20232022$ change% change
Operating RevenuesOperating Revenues$383,856 $316,294 $67,562 21.4 %Operating Revenues$337,716 $400,040 $(62,324)(15.6)%
Operating ExpensesOperating Expenses267,723 241,766 25,957 10.7 Operating Expenses231,663 278,974 (47,311)(17.0)
Operating IncomeOperating Income116,133 74,528 41,605 55.8 Operating Income106,053 121,066 (15,013)(12.4)
Interest Charges9,259 9,648 (389)(4.0)
Nonservice Cost Components of Postretirement Benefits(52)505 (557)(110.3)
Interest ExpenseInterest Expense(9,696)(8,991)(705)7.8 
Nonservice Components of Postretirement BenefitsNonservice Components of Postretirement Benefits2,421 751 1,670 222.4 
Other Income (Expense)Other Income (Expense)(174)203 (377)(185.7)Other Income (Expense)3,253 (889)4,142 (465.9)
Income Before Income TaxesIncome Before Income Taxes106,752 64,578 42,174 65.3 Income Before Income Taxes102,031 111,937 (9,906)(8.8)
Income Tax ExpenseIncome Tax Expense22,513 11,824 10,689 90.4 Income Tax Expense20,062 26,000 (5,938)(22.8)
Net IncomeNet Income$84,239 $52,754 $31,485 59.7 %Net Income$81,969 $85,937 $(3,968)(4.6)%
Operating Revenues increased $67.6decreased $62.3 million primarily due to increases in PVC pipe sale pricesdecreased sales volumes within our Plastics segment, decreased fuel recovery revenues in our Electric segment and decreased steel prices in our Manufacturing segment. These decreases were partially offset by increased transmission services revenue, increased rider revenue, and higher commercial and industrial sales in our Electric segment and increased retail revenues withinsales volumes in our ElectricManufacturing segment. In our Plastics segment, PVC pipe sale volumes decreased as customer demand softened from the same
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period a year ago amid changing market conditions. Decreased sales prices increasedin our Manufacturing segment were primarily due to the unique industry supply and demand dynamics described above.decreased steel prices, which are passed through to customers. In our Electric segment, increaseddecreased fuel recovery revenues were driven by higher fuel andlower purchased power costs and increased commercial and industrial sales volumes contributed to higher operating revenues. In addition, increased sales volumes resulted in increased operating revenues in our Manufacturing segment.volumes. See our segment disclosures below for additional discussion of items impacting operating revenues.
Operating Expenses increased $26.0decreased $47.3 million primarily due to increasedlower sales volumes in our Plastics segment, lower purchased power and fuel costs in our Electric segment. Operating expensessegment and lower material costs in our Manufacturing segment, increased primarily due to increased sales volumes. These increases were partially offset by a decrease in operating expenses in our Plastics segment, due to lower sales volumes.as discussed above. See our segment disclosures below for additional discussion of items impacting operating expenses.
Interest ChargesExpense decreased $0.4increased $0.7 million due to a decrease in theincreased interest raterates on our $140.0 million of fixed-rate long-termshort-term variable rate debt that was refinanced in December 2021, and a lowerhigher level of average short-term borrowings outstanding in 2022 compared to 2021.borrowings.
Nonservice Cost Components of Postretirement Benefits decreased $0.6improved by $1.7 million, having a positive impact on net income, primarily due to the amortization ofa change in actuarial gains resulting from the increase in the discount ratesassumptions used to measure our pension benefit and postretirement benefit liabilities as of December 31, 2021.obligations, including an increase in the discount rate applied and an increase in the expected return on assets assumption.
Other Income decreased $0.4increased $4.1 million primarily due to investment lossesgains on our corporate-owned life insurance policies and other investments during the thirdsecond quarter of 20222023 compared to investment gainslosses in the same period of the previous year.year and investment income earned on our short-term cash equivalent investments.
Income Tax Expense increased $10.7decreased $5.9 million primarily due to increaseddecreased income before income taxes. Our effective tax rate was 21.1%19.7% in the thirdsecond quarter of 20222023 and 18.3%23.2% in the thirdsecond quarter of 2021.2022. The increasedecrease in our effective tax rate was driven by an increase inprimarily due to non-taxable gains on our income before income taxes without a corresponding increase in tax credits and other permanent differences that impact our effective tax rate.corporate-owned life insurance policy investments. See Note 8 to our consolidated financial statements included in this Quarterly Report on Form 10-Q for additional information regarding factors impacting our effective tax rate in 20222023 and 2021.2022.
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ELECTRIC SEGMENT RESULTS
The following table summarizes Electric segment operating results for the three months ended SeptemberJune 30, 2023 and 2022:
(in thousands)20232022$ change% change
Retail Revenues$93,715 $113,603 $(19,888)(17.5)%
Transmission Services Revenues14,829 11,697 3,132 26.8 
Wholesale Revenues2,670 3,537 (867)(24.5)
Other Electric Revenues2,549 2,112 437 20.7 
Total Operating Revenues113,763 130,949 (17,186)(13.1)
Production Fuel14,833 14,714 119 0.8 
Purchased Power5,212 24,162 (18,950)(78.4)
Operating and Maintenance Expenses45,522 42,379 3,143 7.4 
Depreciation and Amortization18,672 18,390 282 1.5 
Property Taxes4,336 4,435 (99)(2.2)
Operating Income$25,188 $26,869 $(1,681)(6.3)%
20232022change% change
Electric kilowatt-hour (kwh) Sales (in thousands)
  
Retail kwh Sales1,345,830 1,286,419 59,411 4.6 %
Wholesale kwh Sales – Company Generation87,032 56,514 30,518 54.0 
Heating Degree Days639 716 (77)(10.8)
Cooling Degree Days254 154 100 64.9 
The operating results of our Electric segment are impacted by fluctuations in weather conditions and the resulting demand for electricity for heating and cooling. The following table shows heating degree days and cooling degree days as a percent of normal for the three months ended June 30, 2023 and 2022.
 20232022
Heating Degree Days120.6 %135.1 %
Cooling Degree Days215.3 %129.4 %
The following table summarizes the estimated effect on diluted earnings per share of the difference in retail kwh sales under actual weather conditions and expected retail kwh sales under normal weather conditions in 2023 and 2022, and 2021:between years.
(in thousands)20222021$ change% change
Retail Revenues$120,177 $96,438 $23,739 24.6 %
Transmission Services Revenues13,156 13,300 (144)(1.1)
Wholesale Revenues7,196 6,944 252 3.6 
Other Electric Revenues2,218 2,093 125 6.0 
Total Operating Revenues142,747 118,775 23,972 20.2 
Production Fuel24,972 17,698 7,274 41.1 
Purchased Power19,913 9,878 10,035 101.6 
Operating and Maintenance Expenses39,799 36,465 3,334 9.1 
Depreciation and Amortization17,669 17,874 (205)(1.1)
Property Taxes4,438 4,474 (36)(0.8)
Operating Income$35,956 $32,386 $3,570 11.0 %
20222021change% change
Electric kilowatt-hour (kwh) Sales (in thousands)
  
Retail kwh Sales1,275,051 1,076,580 198,471 18.4 %
Wholesale kwh Sales – Company Generation99,890 174,187 (74,297)(42.7)
Heating Degree Days22 19 633.3 
Cooling Degree Days376 463 (87)(18.8)
 
2023 vs
Normal
2023 vs
2022
2022 vs
Normal
Effect on Diluted Earnings Per Share$0.04 $0.01 $0.03 
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Retail Revenues decreased $19.9 million primarily due to a $19.2 million decrease in fuel recovery revenues, due to decreased purchased power costs and volumes, as described below. Also, our Minnesota rate case was finalized in the second quarter of 2022, which included a determination of the final interim rate refund and resulted in an additional $4.1 million of retail revenue in the second quarter of 2022. These decreases, were partially offset by:
A $1.6 million increase in retail revenues from increased sales volumes to commercial and industrial customers.
A $2.1 million increase in renewable resource rider revenue, including recovery of costs related to our Hoot Lake Solar project and the Ashtabula III wind farm.
Transmission Services Revenue increased $3.1 million primarily due to increased sales volumes compared to same period in the prior year.
Purchased Power costs to serve retail customers decreased $19.0 million due to a 72% decrease in the price of purchased power per kwh, primarily due to decreased market energy costs, and a 23% decrease in the volume of purchased power, primarily due to the planned outage at Coyote Station in the second quarter of 2022, which resulted in higher purchase volumes last year, as well as the acquisition of the Ashtabula III wind farm in the current year. Prior to the acquisition of Ashtabula III, OTP purchased the wind generated electricity from the facility under the terms of a power purchase agreement.
Operating and MaintenanceExpenses increased $3.1 million primarily due to increased labor costs, increased maintenance and transmission service activities at our wind farm facilities, including the incremental costs associated with the Ashtabula III facility that was purchased during the year, maintenance expenses related to an outage at Big Stone Plant, increased vegetative management expenses, and increased MISO tariff expenses. These increases were partially offset by decreased maintenance and other expenses related to Coyote Station, as the second quarter of 2022 includes costs associated with a planned outage at Coyote Station.
MANUFACTURING SEGMENT RESULTS
The following table summarizes Manufacturing segment operating results for the three months ended June 30, 2023 and 2022:
(in thousands)20232022$ change% change
Operating Revenues$102,475 $103,196 $(721)(0.7)%
Cost of Products Sold (excluding depreciation)79,154 78,515 639 0.8 
Other Operating Expenses10,470 9,890 580 5.9 
Depreciation and Amortization4,531 4,091 440 10.8 
Operating Income$8,320 $10,700 $(2,380)(22.2)%
Operating Revenues decreased $0.7 million primarily due to decreased steel prices, which impacted revenues at BTD Manufacturing, as well as decreased sales volumes at T.O. Plastics. Steel prices declined compared to the second quarter of 2022, resulting in a 15% decrease in material costs, which are passed through to customers. The impact of decreased steel prices was offset by a 14% increase in sales volumes, driven by strong customer and end market demand in the construction, agriculture, and energy markets, as well as sales price increases which were implemented in response to labor and non-steel material cost inflation. Lower scrap metal prices also impacted operating revenues as scrap metal revenues decreased $0.5 million from the previous year. Operating revenues at T.O. Plastics decreased primarily due to decreased sales volumes of horticulture products in response to changing market conditions as order and delivery lead times began to normalize.
Cost of Products Sold increased $0.6 million primarily due to increased sales volumes, as described above, largely offset by decreased material costs, as well as unfavorable cost absorption at BTD. Increased labor costs and lower productivity contributed to unfavorable cost absorption and lower profit margins. The increase in labor costs and the lower level of productivity during the quarter resulted from increased incentives and overtime wages combined with increased staffing levels to meet higher business volumes and the time required for new employees to achieve peak productivity.
Other Operating Expenses increased $0.6 million primarily due to increased salaries, benefits, and other compensation costs.
PLASTICS SEGMENT RESULTS
The following table summarizes Plastics segment operating results for the three months ended June 30, 2023 and 2022:
(in thousands)20232022$ change% change
Operating Revenues$121,478 $165,895 $(44,417)(26.8)%
Cost of Products Sold (excluding depreciation)41,504 73,951 (32,447)(43.9)
Other Operating Expenses3,936 4,340 (404)(9.3)
Depreciation and Amortization1,003 1,043 (40)(3.8)
Operating Income$75,035 $86,561 $(11,526)(13.3)%
Operating Revenues decreased $44.4 million primarily due to a 26% decrease in sales volumes compared to the same period last year. Sales volume decreases in the second quarter were driven by general end market softness and distributors continuing to manage inventory levels. Sales prices declined 1% from the second quarter of 2022 but remained elevated compared to pre-2021 levels.
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Cost of Products Sold decreased $32.4 million due to decreased sales volumes, as described above, and decreased PVC resin costs. PVC resin and other input material costs decreased 37% compared to the same period in the previous year as the unique supply and demand conditions, which caused significant increases in resin costs, have subsided and resin costs have stabilized.
CORPORATE COSTS
The following table summarizes Corporate operating results for the three months ended June 30, 2023 and 2022:
(in thousands)20232022$ change% change
Other Operating Expenses$2,464 $3,022 $(558)(18.5)%
Depreciation and Amortization26 42 (16)(38.1)
Operating Loss$2,490 $3,064 $(574)(18.7)%
Other Operating Expenses decreased $0.6 million primarily due to decreased employee benefit expenses related to decreases in our employee health insurance claim costs.
RESULTS OF OPERATIONS – YEAR TO DATE
CONSOLIDATED RESULTS
The following table summarizes consolidated operating results for the six months ended June 30, 2023 and 2022:
(in thousands)20232022$ change% change
Operating Revenues$676,797 $774,944 $(98,147)(12.7)%
Operating Expenses490,074 555,578 (65,504)(11.8)
Operating Income186,723 219,366 (32,643)(14.9)
Interest Expense(19,111)(17,939)(1,172)6.5 
Nonservice Components of Postretirement Benefits4,833 772 4,061 526.0 
Other Income (Expense)5,370 (629)5,999 (953.7)
Income Before Income Taxes177,815 201,570 (23,755)(11.8)
Income Tax Expense33,365 43,630 (10,265)(23.5)
Net Income$144,450 $157,940 $(13,490)(8.5)%
Operating Revenues decreased $98.1 million primarily due to lower sales volumes within our Plastics segment and decreased steel prices in our Manufacturing segment. These decreases were partially offset by increased sales volumes, due to strong customer demand, in our Manufacturing segment and increased retail and transmission services revenues, due to increased sales volumes and rider revenues, within our Electric segment. See our segment disclosures below for additional discussion of items impacting operating revenues.
Operating Expenses decreased $65.5 million primarily due to lower sales volumes within our Plastics segment, as discussed above. In addition to lower sales volumes, operating expenses in our Plastics segment also decreased due to decreased PVC resin and other input costs. Decreased operating expenses in our Manufacturing segment primarily due to lower material costs at BTD, driven by lower steel prices, were largely offset by higher sales volumes and increases in other operating expenses. Operating expenses in our Electric segment increased primarily due to higher labor costs, maintenance expenses related to an outage at Big Stone Plant, increased maintenance expenses associated with our wind generation assets, and increased vegetative management expenses. See our segment disclosures below for additional discussion of items impacting operating expenses.
Interest Expense increased $1.2 million due to increased interest rates on our short-term variable rate debt, partially offset by a lower level of average borrowings.
Nonservice Components of Postretirement Benefits improved by $4.1 million, having a positive impact on net income, primarily due to a change in actuarial assumptions used to measure our pension benefit and postretirement benefit obligations, including an increase in the discount rate applied and an increase in the expected return on assets assumption.
Other Income increased $6.0 million primarily due to gains on our corporate-owned life insurance policies during the second quarter of 2023 compared to investment losses in the same period of the previous year and investment income earned on our short-term cash equivalent investments.
Income Tax Expense decreased $10.3 million primarily due to decreased income before income taxes. Our effective tax rate was 18.8% for the six months ended June 30, 2023 and 21.6% for the same period in the previous year. The decrease in our effective tax rate was driven by non-taxable gains on our corporate-owned life insurance policy investments and an increase in production tax credits from our wind generation assets in the current period. See Note 8 to our consolidated financial statements included in the report on Form 10-Q for additional information regarding factors impacting our effective tax rate.
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ELECTRIC SEGMENT RESULTS
The following table summarizes Electric segment operating results for the six months ended June 30, 2023 and 2022:
(in thousands)20232022$ change% change
Retail Revenues$230,168 $227,242 $2,926 1.3 %
Transmission Services Revenues26,936 24,254 2,682 11.1 
Wholesale Revenues4,508 6,000 (1,492)(24.9)
Other Electric Revenues4,059 3,869 190 4.9 
Total Operating Revenues265,671 261,365 4,306 1.6 
Production Fuel26,326 29,567 (3,241)(11.0)
Purchased Power47,037 44,691 2,346 5.2 
Operating and Maintenance Expenses91,070 86,659 4,411 5.1 
Depreciation and Amortization36,997 36,772 225 0.6 
Property Taxes8,957 8,866 91 1.0 
Operating Income$55,284 $54,810 $474 0.9 %
20232022change% change
Electric kilowatt-hour (kwh) Sales (in thousands)
  
Retail kwh Sales2,981,076 2,801,716 179,360 6.4 %
Wholesale kwh Sales – Company Generation148,886 122,701 26,185 21.3 
Heating Degree Days4,371 4,537 (166)(3.7)
Cooling Degree Days254 154 100 64.9 
The operating results of our Electric segment are impacted by fluctuations in weather conditions and the resulting demand for electricity for heating and cooling. The following table shows heating and cooling degree days as a percent of normal for the threesix months ended SeptemberJune 30, 20222023 and 2021.2022.
20222021 20232022
Heating Degree DaysHeating Degree Days43.1 %5.8 %Heating Degree Days109.9 %114.9 %
Cooling Degree DaysCooling Degree Days108.4 %132.7 %Cooling Degree Days215.3 %129.4 %
The following table summarizes the estimated effect on diluted earnings per share of the difference in retail kwh sales under actual weather conditions and expected retail kwh sales under normal weather conditions in 20222023 and 2021,2022, and between years.
 
2022 vs
Normal
2022 vs
2021
2021 vs
Normal
Effect on Diluted Earnings Per Share$0.01 $(0.02)$0.03 
 
2023 vs
Normal
2023 vs
2022
2022 vs
Normal
Effect on Diluted Earnings Per Share$0.07 $— $0.07 
Retail Revenues increased $23.7$2.9 million primarily due to the following:
A $16.0 million increase in fuel recovery revenues due to increased production fuel and purchased power costs as described below.
A $4.3 million increase in retail revenues from increased sales volumes from commercial and industrial customers, including the impact of a new commercial customer load in North Dakota.Dakota that came online during the first quarter of 2022.
A $1.2$3.4 million increase in renewable resource rider revenue, including recovery of costs related to our Hoot Lake Solar project and the Ashtabula III wind farm.
These increases were partially offset by a decrease in consumption from the impact of unfavorable weatherfuel recovery revenues, primarily due to decreased fuel and market energy costs, as described below. Also, our Minnesota rate case was finalized in the thirdsecond quarter of 2022, compared towhich included a determination of the same period last year.
Retail revenues in the third quarter of 2021 were negatively impacted by adjustments to our estimatedfinal interim rate refund.refund and resulted in an additional $4.1 million of retail revenue in 2022.
Production Fuel costs increased $7.3decreased $3.2 million primarily asdue to a result of a 28% increase10% decrease in fuel cost per kwh. Increased generationkwh resulting from our fuel-burning plantsdecreases in the third quarter of 2022, as compared to the same period last year, also contributed to the increase in production fuel costs.natural gas prices.
Purchased Powercosts to serve retail customers increased $10.0$2.3 million due to a 45% increase in the price of purchased power per kwh, resulting from increased natural gas and market energy prices, and a 39%13% increase in the volume of purchased power due to increased customer demand.demand and favorable market energy prices, partially offset by a 7% decrease in the price of purchased power per kwh, resulting from decreased natural gas and market energy prices.
Operating and MaintenanceExpense increased $3.3$4.4 million, primarily due to an increase inincreased labor costs, maintenance activities, including our plannedexpenses related to an outage at Coyote Station,Big Stone Plant, increased maintenance and transmission service activities at our wind farm facilities, including the incremental costs associated with the Ashtabula III facility that was purchased during the year, increased vegetative management expenses, higher insurance expenses, and vegetation management, as well as increased transmissionMISO tariff expenses. These increases were partially offset by decreased maintenance and other expenses related to Coyote Station, as the second quarter of 2022 included costs associated with a planned outage at the facility.
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MANUFACTURING SEGMENT RESULTS
The following table summarizes Manufacturing segment operating results for the threesix months ended SeptemberJune 30, 20222023 and 2021:2022:
(in thousands)(in thousands)20222021$ change% change(in thousands)20232022$ change% change
Operating RevenuesOperating Revenues$98,767 $89,977 $8,790 9.8 %Operating Revenues$209,257 $208,154 $1,103 0.5 %
Cost of Products Sold (excluding depreciation)Cost of Products Sold (excluding depreciation)77,764 70,148 7,616 10.9 Cost of Products Sold (excluding depreciation)161,381 164,676 (3,295)(2.0)
Other Operating ExpensesOther Operating Expenses8,627 10,161 (1,534)(15.1)Other Operating Expenses21,047 18,736 2,311 12.3 
Depreciation and AmortizationDepreciation and Amortization3,996 3,794 202 5.3 Depreciation and Amortization9,000 8,105 895 11.0 
Operating IncomeOperating Income$8,380 $5,874 $2,506 42.7 %Operating Income$17,829 $16,637 $1,192 7.2 %
Operating Revenuesincreased $8.8$1.1 million primarily due to a 17% increase in sales volumes at BTD, partiallyas well as sales price increases which were implemented in response to labor and non-steel material cost inflation. Increased sales volumes and pricing were largely offset by lower steel prices, which resulted in a $5.4 million18% decrease in material costs, thatwhich are passed through to customers. Declines in scrap metal prices resulted incustomers, as a $1.3 million decrease in scrap revenue. End market demand remains strong, however, supply chain disruptions experienced by our customers have continued to cause unpredictable shipmentsresult of our products to our customers. Increases inlower steel prices. Increased sales prices and volumes at T.O. Plastics, due to continued strong customer demand,partially offset by a decrease in sales volumes of horticulture products, also contributed to the segment increase in operating revenues.
Cost of Products Sold increased $7.6decreased $3.3 million primarily due to higherlower material costs at BTD, as discussed above, largely offset by increased sales volumes as described above, as well asand unfavorable cost absorption. Unfavorable cost absorption was primarily due to increased labor costs partially offset by favorableand lower productivity. The increase in labor costs and the lower level of productivity during the current year resulted from increased incentives and overtime wages combined with increased staffing levels to meet higher production volumes, and the time required for new employees to achieve peak productivity. Decreased sales volumes at T.O. Plastics, as discussed above, also contributed to the decrease in cost absorption and decreased material costs related to lower steel prices.of products sold.
Other Operating Expenses decreased $1.5increased $2.3 million primarily due to decreased incentive compensationvariable costs based on current yearassociated with increased business activity and financial performance relative to established targets.during the period.
PLASTICS SEGMENT RESULTS
The following table summarizes Plastics segment operating results for the threesix months ended SeptemberJune 30, 20222023 and 2021:2022:
(in thousands)(in thousands)20222021$ change% change(in thousands)20232022$ change% change
Operating RevenuesOperating Revenues$142,342 $107,542 $34,800 32.4 %Operating Revenues$201,869 $305,425 $(103,556)(33.9)%
Cost of Products Sold (excluding depreciation)Cost of Products Sold (excluding depreciation)61,597 64,064 (2,467)(3.9)Cost of Products Sold (excluding depreciation)71,646 139,549 (67,903)(48.7)
Other Operating ExpensesOther Operating Expenses3,921 3,832 89 2.3 Other Operating Expenses7,465 8,304 (839)(10.1)
Depreciation and AmortizationDepreciation and Amortization1,023 1,099 (76)(6.9)Depreciation and Amortization2,040 2,150 (110)(5.1)
Operating IncomeOperating Income$75,801 $38,547 $37,254 96.6 %Operating Income$120,718 $155,422 $(34,704)(22.3)%
Operating Revenues increased $34.8decreased $103.6 million, primarily due to a 57%36% decrease in sales volumes compared to the same period last year, partially offset by a 3% increase in thesales price per pound of PVC pipe sold,sold. Sales volume decreases continue to be attributable to distributor customer inventory management as sales prices remain high duedistributors continue to extraordinaryclosely manage their inventory levels and make strategic purchasing decisions amid uncertain and competitive market conditions. Demand for PVC pipe began to soften during the third quarter as customers started to consume high priced inventory instead of buying additional PVC pipe. Sales volumes for the quarter decreased 15% due to softening customer demand.
Cost of Products Sold decreased $2.5$67.9 million primarily due to decreased sales volumes, as describeddiscussed above, partially offset by increasedas well as a 30% decrease in PVC resin and other input material costs, which increased 14.5% due to the market conditions described above. Resin prices in the third quarter of 2022 increased compared to the same period in the previous year, but decreased compared to the second quarter of 2022.costs.
CORPORATE COSTS
The following table summarizes Corporate operating results for the threesix months ended SeptemberJune 30, 20222023 and 2021:2022:
(in thousands)(in thousands)20222021$ change% change(in thousands)20232022$ change% change
Other Operating ExpensesOther Operating Expenses$3,976 $2,231 $1,745 78.2 %Other Operating Expenses$7,056 $7,417 $(361)(4.9)%
Depreciation and AmortizationDepreciation and Amortization28 48 (20)(41.7)Depreciation and Amortization52 86 (34)(39.5)
Operating LossOperating Loss$4,004 $2,279 $1,725 75.7 %Operating Loss$7,108 $7,503 $(395)(5.3)%
Other Operating Expenses increased $1.7decreased $0.4 million primarily due to increaseddecreased employee benefit expenses related to decreases in our employee health care costs and increased professional serviceinsurance claim costs.
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RESULTS OF OPERATIONS – YEAR TO DATE
CONSOLIDATED RESULTS
The following table summarizes consolidated operating results for the nine months ended September 30, 2022 and 2021:
(in thousands)20222021$ change% change
Operating Revenues$1,158,800 $863,612 $295,188 34.2 %
Operating Expenses823,302 685,063 138,239 20.2 
Operating Income335,498 178,549 156,949 87.9 
Interest Charges27,198 28,601 (1,403)(4.9)
Nonservice Cost Components of Postretirement Benefits(824)1,511 (2,335)(154.5)
Other Income(802)2,095 (2,897)(138.3)
Income Before Income Taxes308,322 150,532 157,790 104.8 
Income Tax Expense66,143 25,380 40,763 160.6 
Net Income$242,179 $125,152 $117,027 93.5 %
Operating Revenues increased $295.2 million primarily due to higher PVC pipe prices within our Plastics segment and increased sales volumes and material costs, which resulted in higher sales prices, in our Manufacturing segment. Increased retail revenues within our Electric segment due to increased fuel recovery revenues, increased sales volumes from commercial and industrial customers, and favorable weather impacts also contributed to the higher operating revenues in 2022. See our segment disclosures below for additional discussion of items impacting operating revenues.
Operating Expenses increased $138.2 million due to increased expenses across all three of our operating segments. Operating expenses in our Electric segment increased primarily from higher purchased power costs due to an increase in the volume and cost of purchased power, increased production fuel costs, and higher operating and maintenance expenses, due to increased planned outage maintenance costs, increased labor costs related to various maintenance activities, and increased transmission tariff expenses. Operating expenses in our Manufacturing segment increased primarily due to higher material costs, largely driven by higher steel prices and higher sales volumes at BTD. Operating expenses in our Plastics segment increased primarily due to increased PVC resin and other input costs, partially offset by decreased sales volumes. See our segment disclosures below for additional discussion of items impacting operating expenses.
Interest Charges decreased $1.4 million due to a lowering of our average interest rate on our long-term debt as a result of refinancing activity in 2021 and 2022, and a decrease in our average short-term borrowings compared to the previous year.
Nonservice Cost Components of Postretirement Benefits decreased $2.3 million primarily due to the amortization of actuarial gains resulting from the increase in the discount rates used to measure our pension benefit and postretirement benefit liabilities as of December 31, 2021.
Other Income decreased $2.9 million primarily due to investment losses on our corporate-owned life insurance policies and other investments during the nine months ended September 30, 2022 compared to investment gains in the same period last year.
Income Tax Expense increased $40.8 million primarily due to increased income before income taxes. Our effective tax rate was 21.5% for the nine months ended September 30, 2022 and 16.9% for the same period in the previous year. The increase in our effective tax rate was driven by an increase in our income before income taxes without a corresponding increase in tax credits and other permanent differences that impact our effective tax rate. See Note 8 to our consolidated financial statements included in the report on Form 10-Q for additional information regarding factors impacting our effective tax rate.
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ELECTRIC SEGMENT RESULTS
The following table summarizes Electric segment operating results for the nine months ended September 30, 2022 and 2021:
(in thousands)20222021$ change% change
Retail Revenues$347,419 $291,130 $56,289 19.3 %
Transmission Services Revenues37,409 37,085 324 0.9 
Wholesale Revenues13,196 14,711 (1,515)(10.3)
Other Electric Revenues6,088 5,703 385 6.8 
Total Operating Revenues404,112 348,629 55,483 15.9 
Production Fuel54,538 44,576 9,962 22.3 
Purchased Power64,604 40,273 24,331 60.4 
Operating and Maintenance Expenses126,460 114,615 11,845 10.3 
Depreciation and Amortization54,441 53,335 1,106 2.1 
Property Taxes13,304 13,136 168 1.3 
Operating Income$90,765 $82,694 $8,071 9.8 %
20222021change% change
Electric kilowatt-hour (kwh) Sales (in thousands)
  
Retail kwh Sales4,076,769 3,511,730 565,039 16.1 %
Wholesale kwh Sales – Company Generation222,591 358,761 (136,170)(38.0)
Heating Degree Days4,559 3,614 945 26.1 
Cooling Degree Days530 700 (170)(24.3)
The operating results of our Electric segment are impacted by fluctuations in weather conditions and the resulting demand for electricity for heating and cooling. The following table shows heating and cooling degree days as a percent of normal for the nine months ended September 30, 2022 and 2021.
 20222021
Heating Degree Days114.0 %89.9 %
Cooling Degree Days113.7 %150.9 %
The following table summarizes the estimated effect on diluted earnings per share of the difference in retail kwh sales under actual weather conditions and expected retail kwh sales under normal weather conditions in 2022 and 2021, and between years.
 
2022 vs
Normal
2022 vs
2021
2021 vs
Normal
Effect on Diluted Earnings Per Share$0.08 $0.06 $0.02 
Retail Revenues increased $56.3 million primarily due to the following:
A $35.0 million increase in fuel recovery revenues primarily due to increased purchased power and production fuel costs, as described below, and a decrease in credits provided to retail customers from decreased margins recognized on wholesale sales.
A $11.5 million increase in retail revenues from increased sales volumes from commercial and industrial customers, including the impact of a new commercial customer load in North Dakota.
A $4.1 million increase in interim rate revenue due to the finalization of the interim rate refund, as approved by the MPUC in the second quarter of 2022.
A $3.0 million increase in revenues from the favorable impact of weather in the first nine months of 2022 compared to the same period last year.
Retail revenues also benefited from increased transmission, renewable and phase-in rider revenue in the first nine months of 2022. These increases were partially offset by a decrease in conservation improvement program (CIP) revenue as a result of decreased CIP spending and related cost recovery. Retail revenues in 2021 were negatively impacted by adjustments to our estimated interim rate refund.
Production Fuel costsincreased $10.0 million due to a 32% increase in fuel cost per kwh, which was partially offset by a decrease in kwhs generated from our fuel-burning plants due to our planned outage at Coyote Station in 2022 and the retirement of Hoot Lake Plant in May 2021.
Purchased Power costs to serve retail customers increased $24.3 million due to a 44% increase in the volume of purchased power, resulting from the planned outage at Coyote Station, the retirement of Hoot Lake Plant and increased customer demand, and an 11% increase in the price of purchased power per kwh, resulting from increased natural gas and market energy prices.
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Operating and Maintenance Expense increased $11.8 million, primarily due the following:
Higher maintenance costs primarily arising from our planned outage at Coyote Station and increased maintenance costs at our wind generation assets.
Increased transmission tariff expenses.
Higher labor costs associated with increased maintenance activities, including vegetative management and other activities.
Increased travel costs driven by higher fuel costs for our vehicle fleet and increased travel activities.
Partially offsetting these increases were lower CIP expenses compared to the previous year and a decrease in expenses from our Minnesota rate case compared to 2021.
MANUFACTURING SEGMENT RESULTS
The following table summarizes Manufacturing segment operating results for the nine months ended September 30, 2022 and 2021:
(in thousands)20222021$ change% change
Operating Revenues$306,921 $250,085 $56,836 22.7 %
Cost of Products Sold (excluding depreciation)242,440 189,183 53,257 28.2 
Other Operating Expenses27,363 28,109 (746)(2.7)
Depreciation and Amortization12,101 11,395 706 6.2 
Operating Income$25,017 $21,398 $3,619 16.9 %
Operating Revenues increased $56.8 million primarily due to a $35.6 million increase in material costs at BTD, which are passed through to customers, as a result of higher steel prices. Steel prices have been highly volatile in 2022 and were higher on average compared to the previous year, which resulted in increased revenues as we sold through high-priced inventory. Operating revenues also increased due to a 7.6% increase in sales volumes and price increases related to inflationary costs being experienced across the business. Increases in sales prices and volumes at T.O. Plastics, primarily due to strong customer demand in the horticulture sector, also contributed to the increase in operating revenues.
Cost of Products Sold increased $53.3 million primarily due to higher material costs and sales volumes at BTD. The increase in material cost was largely driven by increased steel prices as mentioned above. Cost of products sold at BTD was positively impacted by favorable cost absorption in the first nine months of 2022 compared to the prior year. Increased sales volumes and material costs at T.O. Plastics also contributed to the increase in cost of products sold.
PLASTICS SEGMENT RESULTS
The following table summarizes Plastics segment operating results for the nine months ended September 30, 2022 and 2021:
(in thousands)20222021$ change% change
Operating Revenues$447,767 $264,898 $182,869 69.0 %
Cost of Products Sold (excluding depreciation)201,146 169,584 31,562 18.6 
Other Operating Expenses12,225 10,450 1,775 17.0 
Depreciation and Amortization3,173 3,200 (27)(0.8)
Operating Income$231,223 $81,664 $149,559 183.1 %
Operating Revenues increased $182.9 million, primarily due to a 83% increase in the price per pound of PVC pipe sold. As discussed above, PVC pipe sale prices increased due to strong demand for PVC pipe products, limited PVC pipe inventories, and increases in the cost of resin. Resin and other material input supply constraints negatively impacted our production volumes, which coupled with low inventory levels, impacted sales volumes, which were down 7.5% compared to the previous year.
Cost of Products Sold increased $31.6 million primarily due to increased PVC resin and other input costs, which increased 29% due to the market conditions described above, partially offset by decreased sales volumes. Labor and overhead costs also increased from the previous year.
Other Operating Expenses increased $1.8 million primarily due to increased incentive compensation costs and sales commissions, which increased as a result of increased operating revenues and earnings compared to the previous year.
CORPORATE COSTS
The following table summarizes Corporate operating results for the nine months ended September 30, 2022 and 2021:
(in thousands)20222021$ change% change
Other Operating Expenses$11,393 $7,028 $4,365 62.1 %
Depreciation and Amortization114 179 (65)(36.3)
Operating Loss$11,507 $7,207 $4,300 59.7 %
Other Operating Expenses increased $4.4 million primarily due to increased employee health care costs, increased professional service costs, increased incentive compensation costs based on the current year financial and operating performance, and increased travel costs.
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REGULATORY RATE MATTERS
The following provides a summary of general rate case filings, rate rider filings and other regulatory filings that have or are expected to have a material impact on our operating results, financial position or cash flows.
GENERAL RATES
Minnesota Rate Case: On November 2, 2020, OTP filed an initial request with the MPUC for an increase in revenue recoverable through base rates in Minnesota, and on December 3, 2020, the MPUC approved an interim annual rate increase of $6.9 million, or 3.2%, effective January 1, 2021.
On February 1, 2022, the MPUC issued its written order on final rates. The key provisions of the order included a revenue requirement of $209.0 million, based on a return on rate base of 7.18% and an allowed return on equity of 9.48% on an equity ratio of 52.5%. The order also authorized recovery of our remaining Hoot Lake Plant net asset over a five-year period and approved the requested decoupling mechanism for most residential and commercial customer rate groups with a cap of 4% of annual base revenues.
On May 12, 2022, OTP's final rate case compliance filing was approved by the MPUC. The filing included final revenue calculations, rate design and resulting tariff revisions, along with a determination of the interim rate refund, which resulted in an increase in revenues during the second quarter of 2022 of $4.1 million. Final rates took effect on July 1, 2022, and interim rate refunds of $15.3 million were completed in the third quarter of 2022.
RATE RIDERS
The following table includes a summary of pending and recently concluded rate rider proceedings:
RecoveryFilingAmountEffective
MechanismJurisdictionStatusDate(in millions)DateNotesDescription
RRR - 2022MNApproved11/01/22$17.5 07/01/23Recovery of Hoot Lake Solar costs, Ashtabula III costs, and true up for PTCs from Merricourt.
CIP - 2022MNApproved04/01/22$10.8 10/01/22Includes recoveryRecovery of energy conservation improvement costs as well as a demand side management financial incentive.
CIP - 20212023MNApproved04/01/2103/239.49.7 12/10/01/2123Includes recoveryRecovery of energy conservation improvement costs as well as a demand side management financial incentive.
TCR - 2021MNApproved11/23/217.2 08/01/22Includes recoveryRecovery of two new transmission projects.project costs.
RRR - 2021MNApproved12/06/217.0 08/01/22Includes return onRecovery of Hoot Lake Solar construction costs and costs associated with the acquisition of the Ashtabula III wind farm.costs.
EITE - 2023MNApproved04/14/232.2 01/01/24Biennial update to Energy-Intensive, Trade-Exposed rider.
EUIC - 2023MNRequested03/20/231.3 07/01/23Recovery of advanced metering infrastructure, outage management and demand response system projects.
RRR - 20212023NDApproved03/07/2112/30/2211.812.2 04/05/01/2123Includes recoveryRecovery of Merricourt, investmentAshtabula III and operatingother costs.
RRR - 2022NDApproved01/05/227.8 04/01/22IncludesRecovery of Merricourt recovery, the proposed purchase ofcosts, Ashtabula III costs, and credits related to deferred taxes and production tax credits.
TCR - 2022NDRequestedApproved09/15/227.5 01/01/23Includes recovery of three new transmission projects, one transmission rebuild project and six transmission projects related to extending the useful lifeRecovery of transmission assets.project costs.
TCR - 2021NDApproved09/15/216.1 01/01/22Includes recoveryRecovery of three new transmission projects/programs.
TCR - 2020NDApproved11/18/205.6 01/01/21Includes recovery of eight new transmission projects.
GCR - 2021NDApproved03/01/215.2 07/01/21Includes recovery of Astoria Station, net of anticipated savings associated with the retirement of Hoot Lake Plant.project costs.
GCR - 2022NDApproved03/01/223.3 07/01/22Annual update to generation cost recovery rider.
AGIAMDT - 2022NDRequestedApproved07/08/223.1 01/01/23Includes recoveryRecovery of the advanced metering infrastructure, outage management system and demand response projects.
GCR - 2023NDApproved03/03/232.2 07/01/23Recovery of Astoria Station, net of anticipated savings associated with the retirement of Hoot Lake Plant.
PIR - 2022SDApproved06/01/223.0 09/01/22Includes recoveryRecovery of the Ashtabula III, wind farm purchase, Merricourt, Astoria Station, and the Advanced Grid Infrastructure project as well ascosts, and impact of load growth credits.
TCR - 20202022SDApproved11/01/29/20222.33.0 03/02/2001/23Annual update toRecovery of transmission cost recovery rider.project costs.
PIR - 2023SDRequested06/01/232.6 09/01/23Recovery of Ashtabula III, Merricourt, Astoria Station, Advanced Grid Infrastructure project costs, and impact of load growth credits.
TCR - 20222021SDApproved10/29/212.2 03/01/22Annual update toRecovery of transmission cost recovery rider.
TCR - 2021SDApproved02/19/212.2 03/01/21Includes recovery of two new transmission projects.project costs.
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Energy Adjustment Rider: On October 20, 2022, OTP filed supplemental comments in the Minnesota 2023 Energy Adjustment Rider (EAR) docket. As part of this filing, OTP proposed to refund the Minnesota portion of capacity auction revenues (see below for further details) through this rider and proposed a mechanism to address load reallocation due to the impact of a recent load addition in North Dakota. The filing proposed an assessment in 2022 and 2023 to determine whether actual, weather normalized earnings, as measured based on ROE, including the crediting of capacity auction revenues, are above or below our authorized ROE in Minnesota (9.48%). Under our proposal, should OTP under or over earn its authorized ROE, an adjustment to recover amounts from, or refund amounts to, Minnesota customers would be effectuated through the EAR. OTP proposed three ROE ranges above or below the allowed ROE for which a surcharge or refund would be calculated, including a 20 basis point range in which no surcharge or refund would be assessed, a 21 to 100 basis point range in which 50% of the over or under earning in this range would be collected from or refunded to customers, and a range above 100 basis points in which 100% of the over or under earning in this range would be collected from or refunded to customers. Our proposal is still pending before the MPUC. Should our proposal be accepted without modification, as of September 30, 2022, we estimated no refund or surcharge would be assessed under the requested mechanism.
MISO CAPACITY AUCTION
OTP offered 88 megawatts of excess capacity into the annual MISO planning resource auction for the period June 2022 through May 2023. As a result of a capacity shortage in the MISO region, capacity prices cleared the auction at maximum pricing. As a result, the 88 megawatts of auctioned capacity will generate approximately $9.3 million of net capacity auction revenues over the twelve month period beginning in June 2022. Through September 30, 2022, OTP has received approximately $2.9 million of excess capacity auction revenues. We anticipate a portion of the capacity auction revenues will be used to mitigate customer rate increases or returned to customers through various mechanisms in each jurisdiction.
INTEGRATED RESOURCE PLAN
On September 1, 2021,March 31, 2023, OTP filed itssubmitted a supplemental resource plan filing to the MPUC, the NDPSC, and the South Dakota Public Utilities Commission. The supplemental filing updates OTP’s original 2022 Integrated Resource Plan (2022 IRP) concurrently with regulators in, which was filed on September 1, 2021. In the three states wheresupplemental filing, OTP operates, Minnesota, North Dakota and South Dakota. The 2022 IRP included OTP’s preferredoutlined its updated plan for meeting customers’ anticipated capacity and energy needs while maintaining system reliability and low electric service rates.rates, in light of several changes that have occurred since the original filing, including significant winter and spring reserve planning margins adopted by MISO, tax credits made available for renewable energy projects under the Inflation Reduction Act, the enactment of the Clean Energy Bill in Minnesota, and recent volatility in energy and capacity markets.
The components ofmajor requests in OTP's preferred plansupplemental filing include:
the addition of dualon-site liquefied natural gas fuel capabilitystorage at our Astoria Station natural gas plant;plant in 2026;
the addition of 150approximately 200 megawatts of solar generation in 2025;2027-2028;
undertaking the addition of 100initial steps necessary to add approximately 200 megawatts of wind generation in 2027;2029; and
the commencement of the process of withdrawinga withdrawal from our 35 percent ownership interest in Coyote Station, a jointly owned,jointly-owned coal-fired generation plant, by December 31, 2028; andin the event we are required to make a major, non-routine capital investment in the plant.
Consistent with the addition of 50 megawatts of solar generation in 2033.
Although theoriginal 2022 IRP, includes planned actions beyond 2026, regulators will not act on or approve planned actions in periods beyond 2026 as part of our 2022 IRP filing.
Subjectthe supplemental filing proposes to, subject to regulatory approval, the preferred plan proposes to create a regulatory asset as a vehicle to recover costs related to aany future withdrawal from Coyote Station, includingStation. Should such a withdrawal occur, we anticipate the regulatory asset would include the net
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book value of the plant on the withdrawal date, anticipated decommissioning costs, and any required costs incurred as a result of an early termination ofif the existing lignite sales agreement, under which Coyote Station acquires all of its lignite coal, from a nearby mine.must be terminated. As part of an economic analysis included in the filing, OTP developed an estimate of the reasonably foreseeable costs of withdrawing from Coyote Station, which was determined to be $68.5 million, assuming a withdrawal at the end of 2028 of $68.5 million.2028. These costs may differ from actual results due to the uncertainty and timing of future events associated with the terms and conditions ofwhich could result in a withdrawal.
On October 14, 2022, OTP submitted a supplemental filing to update its 2022 IRP, requesting the procedural schedule in Minnesota be amended to allow for additional time to update our resource modeling given significant changes in the energy industry since the original 2022 IRP filing, while maintaining the original procedural schedule as it relates to adding dual fuel capability at Astoria Station. Our original filing proposed fuel oil as the secondary on-site fuel at Astoria Station and our supplemental filing reflects revised cost estimates and liquified natural gas as the most cost-effective secondary fuel source. The recent changes which led to our request include FERC’s approval of MISO’s new seasonal resource adequacy construct, MISO’s proposal to significantly increase winter and spring planning reserve margins, and enactment of the Inflation Reduction Act. On November 1, 2022, the MPUC approved OTP's requested changes to the procedural schedule for the 2022 IRP. OTP plans to file an updated resource plan in March 2023, as approved under the amended schedule. In conjunction with the updated resource plan, OTP's preferred plan could change based on the results of the updated resource modeling incorporating the factors listed above, as well as other changes. A change to the preferred plan could ultimately impact the nature, timing and amount of future capital investments, as well as the potential for OTP's withdrawal from Coyote Station. A notice
ENVIRONMENTAL REGULATION
Climate Change and Greenhouse Gas Regulation
In May 2023, the EPA proposed new regulations under Section 111 of the request submittedClean Air Act to regulate greenhouse gas (GHG) emissions from existing and new fossil fuel-based electric generating units (EGU). The proposal provides requirements for different types of fossil fuel-based EGUs with various compliance dates.
For existing coal-fired steam generating units that were in operation before January 8, 2014 and that plan to operate past December 31, 2039, the proposal would (subject to certain exceptions) set emissions standards that reflect the use of carbon capture and sequestration (CCS) with 90% capture of carbon dioxide emissions beginning in 2030.
For existing coal-fired steam generating units that are scheduled to be retired between January 1, 2032 and December 31, 2039, the proposed rule would, in general, set emissions standards that reflect the use of co-firing 40% natural gas with coal beginning in 2030.
For existing coal-fired steam generating units that will either (a) retire by January 1, 2032, or (b) retire between 2032 and December 21, 2034 and will operate at a 20% annual capacity factor limit in the meantime, the proposed rule would simply require routine maintenance and no increase in emission rate.
The proposal also includes emission standards for existing large (greater than 300 mega-watt), frequently-used (those that operate at a capacity factor over 50%) natural gas combustion turbines, including the use of CCS or co-firing with low-GHG hydrogen. Under the proposed rule, each state must submit a plan to the MPUC was also providedEPA to implement standards that are at least as stringent as the North Dakota Public Service CommissionEPA’s emission guidelines. The EPA is proposing to require states to submit their plans within 24 months of the effective date of the regulation.
We continue to review and South Dakota Public Utilities Commission.evaluate the proposal and its impact, if adopted as proposed, on our EGUs and the potential impact to our operating results, financial condition and liquidity. Coyote Station and Big Stone Plant, our two co-owned coal-fired power plants, would be within the scope of the proposed regulations. We do not believe our combustion turbines would be within the scope of the regulation given their size and operating frequency.
LIQUIDITY
LIQUIDITY OVERVIEW
We believe our financial condition is strong and our cash and cash equivalents, other liquid assets, operating cash flows, existing lines of credit, access to capital markets and borrowing ability, because of investment-grade credit ratings, when taken together, provide us ample liquidity to conduct our business operations, fund our short-term and long-term capital expenditure plans and satisfy our obligations as they become due. Our liquidity, including our operating cash flows and access to capital markets, cancould be impacted by macroeconomic factors outside of our control, including higher interest rates and debt capital costs and diminished credit availability. In addition, our liquidity could be impacted by non-
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compliancenon-compliance with certain financial covenants under our various debt instruments. As of SeptemberJune 30, 2022,2023, we were in compliance with all financial covenants (see the Financial Covenants section under Capital Resources below).
The following table presents the status of our lines of credit as of SeptemberJune 30, 20222023 and December 31, 2021:2022:
2022202120232022
(in thousands)(in thousands)Borrowing LimitAmount OutstandingLetters
of Credit
Amount AvailableAmount Available(in thousands)Borrowing LimitAmount OutstandingLetters
of Credit
Amount AvailableAmount Available
OTC Credit AgreementOTC Credit Agreement$170,000 $— $— $170,000 $147,363 OTC Credit Agreement$170,000 $ $ $170,000 $170,000 
OTP Credit AgreementOTP Credit Agreement170,000 — 9,919 160,081 88,315 OTP Credit Agreement170,000 50,197 9,573 110,230 152,223 
TotalTotal$340,000 $— $9,919 $330,081 $235,678 Total$340,000 $50,197 $9,573 $280,230 $322,223 
We have an internal risk tolerance metric to maintain a minimum of $50 million of liquidity under the OTC Credit Agreement. Should additional liquidity be needed, this agreement includes an accordion feature allowing us to increase the amount available to $290 million, subject to certain terms and conditions. The OTP Credit Agreement also includes an accordion feature allowing OTP to increase that facility to $250 million, subject to certain terms and conditions.
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CASH FLOWS
The following is a discussion of our cash flows for the ninesix months ended SeptemberJune 30, 20222023 and 2021:2022:
(in thousands)(in thousands)20222021(in thousands)20232022
Net Cash Provided by Operating ActivitiesNet Cash Provided by Operating Activities$287,973 $154,752 Net Cash Provided by Operating Activities$184,497 $175,630 
Net Cash Provided by Operating Activities increased $133.2$8.9 million for the ninesix months ended SeptemberJune 30, 20222023 compared to the ninesix months ended SeptemberJune 30, 2021,2022, primarily due primarily to the $117.0absence of a pension plan contribution in 2023 due to the plan's funded status, whereas a $20.0 million increasediscretionary contribution was made in net income, largelyFebruary 2022, as well as increases to certain regulatory liabilities for fuel cost recovery due to increased customer collections that will be returned to customers in future periods. Increases to operating cash flows were partially offset by lower earnings from our Plastics segment, and a lower level ofhigher working capital needs in the first nine months of 2022 compared to the prior year.capital.
(in thousands)20222021
Net Cash Used in Investing Activities$127,556 $117,084 
(in thousands)20232022
Net Cash Used in Investing Activities$153,625 $73,895 
Net Cash Used in Investing Activities increased $10.5$79.7 million for the ninesix months ended SeptemberJune 30, 20222023 compared to the ninesix months ended SeptemberJune 30, 2021.2022. The increase in cash used in investing activities was primarily due to a higher amount of Electric segment capital investment compared to last year.year, including the purchase of the Ashtabula III wind farm for $50.6 million in January 2023. Capital expenditures in our Manufacturing and Plastics segments increased $14.0 million as a result of investments in additional equipment and a facility expansion project at our Plastics segment facility in Phoenix, Arizona.
(in thousands)(in thousands)20222021(in thousands)20232022
Net Cash Used in Financing Activities$88,967 $37,559 
Net Cash Provided by (Used in) Financing ActivitiesNet Cash Provided by (Used in) Financing Activities$710 $(41,283)
Net Cash Used inProvided by (Used in) Financing Activities increased $51.4$42.0 million for the ninesix months ended SeptemberJune 30, 20222023 compared to the ninesix months ended SeptemberJune 30, 2021.2022. Financing activities for the ninesix months ended SeptemberJune 30, 20222023 included net proceeds from short-term borrowings of $42.0 million under the issuance of $90.0 million of long-term debt at OTP credit agreement, which waswere primarily used to repay $30.0 millionfund the acquisition of long-term debt that matured in August 2022, to repay short-term borrowings, fundAshtabula III and other capital expenditures,investments, and for other general corporate purposes.dividend payments of $36.5 million. Financing activities for the ninesix months ended SeptemberJune 30, 2022 also included net repayments of short-term borrowings of $91.2 million, the issuance of $90.0 million of long-term debt, and dividend payments of $51.6 million. Financing activities for the nine months ended September 30, 2021 included net proceeds from short-term borrowings of $16.9 million and dividend payments of $48.6$34.4 million.
CAPITAL REQUIREMENTS
CAPITAL EXPENDITURES
We have a capital expenditure program for expanding, upgrading and improving our plants and operating equipment. Typical uses of cash for capital expenditures are investments in electric generation facilities and environmental upgrades, transmission and distribution lines, manufacturing facilities and upgrades, equipment used in the manufacturing process, and computer hardware and information systems. Our capital expenditure program is subject to review and regulatory approval and is revised in light of changes in demands for energy, technology, environmental laws, tax laws, regulatory changes, business expansion opportunities, the costs of labor, materials and equipment, and our financial condition.
We have updated our capital expenditure plans in our Electric segment in light of recent changes in the energy industry and recent regulatory actions, including FERC’s approval of MISO’s new seasonal resource adequacy construct, MISO’s proposal to significantly increase winter and spring planning reserve margins, MISO's approval of certain projects as part of its long-range transmission plan, and the enactment of the Inflation Reduction Act. The significant changes to our anticipated capital investments over the next five years include additional investment in multiple transmission projects, the modification of investments in wind generation, including the incorporation of wind repowering into our current capital investment plan, and a reduction in planned solar generation. The table below reflects these changes, as well as all other currently anticipated capital investments over the next five years in our Electric, Manufacturing, and Plastics segments.
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The following provides a summary of actual capital expenditures for the year ended December 31, 2021,2022, anticipated annual capital expenditures for the current year ending December 31, 2022,2023, and anticipated capital expenditures for the next fivesubsequent four years, along with electric utility average rate base and annual rate base growth:
(in millions)(in millions)2021
2022(1)
20232024202520262027Total
2023 - 2027
(in millions)2022
2023(1)
2024202520262027Total
2023 - 2027
Electric Segment:
Electric SegmentElectric Segment
Renewables and Natural Gas GenerationRenewables and Natural Gas Generation$33 $88 $119 $88 $79 $10 $384 Renewables and Natural Gas Generation$88 $119 $88 $85 $49 $429 
Technology and InfrastructureTechnology and Infrastructure33 30 75 Technology and Infrastructure33 30 75 
Distribution Plant ReplacementsDistribution Plant Replacements40 33 37 38 38 43 189 Distribution Plant Replacements33 37 38 38 43 189 
Transmission (includes replacements)Transmission (includes replacements)38 34 36 46 87 78 281 Transmission (includes replacements)34 36 46 87 78 281 
OtherOther30 26 25 30 25 22 128 Other26 25 30 24 23 128 
Total Electric SegmentTotal Electric Segment$140 $150 $214 $247 $208 $234 $154 $1,057 Total Electric Segment$148 $214 $247 $208 $239 $194 $1,102 
Manufacturing and Plastics SegmentsManufacturing and Plastics Segments32 34 48 53 29 25 24 179 Manufacturing and Plastics Segments23 48 53 29 25 24 179 
Total Capital ExpendituresTotal Capital Expenditures$172 $184 $262 $300 $237 $259 $178 $1,236 Total Capital Expenditures$171 $262 $300 $237 $264 $218 $1,281 
Total Electric Utility Average Rate BaseTotal Electric Utility Average Rate Base$1,575 $1,620 $1,750 $1,850 $1,990 $2,110 $2,210 Total Electric Utility Average Rate Base$1,624 $1,748 $1,851 $1,990 $2,111 $2,230 
Annual Rate Base GrowthAnnual Rate Base Growth2.9 %8.0 %5.7 %7.6 %6.0 %4.7 %Annual Rate Base Growth3.1 %7.6 %5.9 %7.5 %6.1 %5.6 %
(1) Includes actual results for the nine months ended September 30, 2022, and anticipated capital expenditures for the fourth quarter of 2022.
(1) Includes actual results for the six months ended June 30, 2023, and anticipated capital expenditures for the remaining six months of 2023.
(1) Includes actual results for the six months ended June 30, 2023, and anticipated capital expenditures for the remaining six months of 2023.
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CONTRACTUAL OBLIGATIONS
Our contractual obligations primarily include principal and interest payments due under our outstanding debt obligations, commitments to acquire coal, energy and capacity commitments, payments to meet our postretirement benefit obligations, and payment obligations under land easements and leasing arrangements.
On June 23, 2022, OTP exercised its option to acquire the Ashtabula III wind farm, a 62.4 megawatt wind farm located in eastern North Dakota, for $49.7 million, subject to certain closing adjustments. The purchase has received regulatory approval. We anticipate the transaction will close, subject to certain customary closing conditions, in January 2023.
Our contractual obligations as of December 31, 20212022 are included in Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations, of our Annual Report on Form 10-K for the year ended December 31, 2021.2022. Except for the obligations arising from new land easements assumed in connection with the purchase of Ashtabula III, wind farm purchase described above, there were no material changes in our contractual obligations outside of the ordinary course of our business during the ninesix months ended SeptemberJune 30, 2022.2023.
Off-Balance Sheet Arrangements
In connection with the purchase of the Ashtabula III wind farm in January 2023, we assumed 51 land easements not classified as leases, which require annual payments. As of SeptemberJune 30, 2022, we have outstanding letters2023, the remaining payments to be made under the easements were $4.1 million and the remaining terms of credit totaling $13.0 million, a portion of which reduces our borrowing capacity under our lines of credit. No outstanding letters of credit are reflected in outstanding short-term debt on our consolidated balance sheets. We do not have any other off-balance sheet arrangements or any relationships with unconsolidated entities or financial partnerships that have, or are reasonably likely to have, a material current or future effect on our financial condition. These entities are often referred to as structured finance special purpose entities or variable interest entities, which are established for the purpose of facilitating off-balance sheet arrangements or for other contractually narrow or limited purposes. We are not exposed to any financing, liquidity, market or credit risk that could arise if we had such relationships.agreements extend into 2034.
COMMON STOCK DIVIDENDS
We paid dividends to our common stockholders totaling $51.6$36.5 million, or $1.2375$0.875 per share, in the first ninesix months of 2022.2023. The determination of the amount of future cash dividends to be paid will depend on, among other things, our financial condition, our actual or expected level of earnings and cash flows from operations, the level of our capital expenditures and our future business prospects. As a result of certain statutory limitations or regulatory or financing agreements, the amount of dividends we are allowed to pay could be restricted. See Note 10 to our consolidated financial statements included in this Quarterly Report on Form 10-Q for additional information. The decision to declare a dividenddividends is reviewed quarterly by our Board of Directors.
CAPITAL RESOURCES
Financial flexibility is provided by operating cash flows, unused lines of credit and access to capital markets, whichand is aided by strong financial coverages and investment grade credit ratings. Debt financing will be required in the five-year period from 20222023 through 20262028 to refinance maturing debt and to finance our capital investments. Our financing plans are subject to change and are impacted by our planned level of capital investments, and decisions to reduce borrowings under our lines of credit, to refund or retire early any of our outstanding debt, to complete acquisitions, or to use capital for other corporate purposes.
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REGISTRATION STATEMENTS
On May 3, 2021, we filed a shelf registration statement with the SEC under which we may offer for sale, from time to time, either separately or together in any combination, equity, debt or other securities described in the shelf registration statement. No new debt or equity has been issued pursuant to the registration statement. The registration statement expires in May 2024.
On May 3, 2021, we filed a second registration statement with the SEC for the issuance of up to 1,500,000 common shares under an Automatic Dividend Reinvestment and Share Purchase Plan, which provides shareholders, retail customers of OTP and other interested investors methods of purchasing our common shares by reinvesting their dividends or making optional cash investments. Shares purchased under the plan may be newly issued common shares or common shares purchased on the open market. As of SeptemberJune 30, 2022,2023, there were 1,287,7741,194,682 shares available for purchase or issuance under the plan. The registration statement expires in May 2024.
SHORT-TERM DEBT
OTC and OTP are each party to a credit agreement (the OTC Credit Agreement and the OTP Credit Agreement, respectively) which each provide for unsecured revolving lines of credit. The following is a summary of key provisions and borrowing information as of, and for the ninesix months ended, September 30, 2022:
(in thousands, except interest rates)OTC Credit AgreementOTP Credit Agreement
Borrowing Limit$170,000 $170,000 
Borrowing Limit if Accordion Exercised1
290,000 250,000 
Amount Restricted Due to Outstanding Letters of Credit as of September 30, 2022— 9,919 
Amount Outstanding as of September 30, 2022— — 
Average Amount Outstanding During the Nine Months Ended September 30, 202215,625 30,235 
Maximum Amount Outstanding During the Nine Months Ended September 30, 202258,715 74,519 
Interest Rate as of September 30, 20224.64 %4.39 %
Maturity DateSeptember 30, 2026September 30, 2026
1Each facility includes an accordion featuring allowing the borrower to increase the borrowing limit if certain terms and conditions are met.
On October 31, 2022, OTC entered into a Fifth Amended and Restated Credit Agreement and OTP entered into a Fourth Amended and Restated Credit Agreement, in each case amending and restating the previously existing credit agreements to extend the maturity date of each agreement from September 30, 2026 to October 29, 2027 and to replace LIBOR as a benchmark interest rate with the Secured Overnight Finance Rate (SOFR). The adoption of SOFR as a benchmark interest rate is in advance of the scheduled elimination of LIBOR as a benchmark interest rate on June 30, 2023. We do not expect this change in benchmark interest rates will have a material impact on our operating results or cash flows. No other significant terms or conditions, including borrowing capacity, credit spreads or financial covenants, were modified under these amendments and restatements.2023:
(in thousands, except interest rates)OTC Credit AgreementOTP Credit Agreement
Borrowing Limit$170,000 $170,000 
Borrowing Limit if Accordion Exercised1
290,000 250,000 
Amount Restricted Due to Outstanding Letters of Credit as of June 30, 2023— 9,573 
Amount Outstanding as of June 30, 2023— 50,197 
Average Amount Outstanding During the Six Months Ended June 30, 2023— 48,846 
Maximum Amount Outstanding During the Six Months Ended June 30, 2023— 61,006 
Interest Rate as of June 30, 20236.64 %6.48 %
Maturity DateOctober 29, 2027October 29, 2027
1Each facility includes an accordion featuring allowing the borrower to increase the borrowing limit if certain terms and conditions are met.
LONG-TERM DEBT
As of SeptemberJune 30, 2022,2023, we had $827.0 million of principal outstanding under long-term debt arrangements. These instruments generally provide for unsecured borrowings at fixed rates of interest with maturities ranging from 2026 to 2052. Pursuant to a Note Purchase Agreement executed in June 2021, OTP issued its Series 2022A Notes due May 20, 2052, in May 2022 for aggregate proceeds of $90.0 million, a portion of which was used to repay the $30.0 million Series 2007B Notes at their maturity in August 2022.
Note 6 to our consolidated financial statements included in this Quarterly Report on Form 10-Q includes additional information regarding these short-term and long-term debt instruments.
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Financial Covenants
Certain of our short- and long-term debt agreements require OTC and OTP to maintain certain financial covenants. As of SeptemberJune 30, 2022,2023, we were in compliance with these financial covenants as further described below:
OTC, under its financial covenants, may not permit its ratio of interest-bearing debt to total capitalization to exceed 0.60 to 1.00, may not permit its interest and dividend coverage ratio to be less than 1.50 to 1.00, and may not permit its priority indebtedness to exceed 10 percent of its total capitalization. As of SeptemberJune 30, 2022,2023, OTC's interest-bearing debt to total capitalization was 0.410.40 to 1.00, OTC's interest and dividend coverage ratio was 11.3710.18 to 1.00, and OTC had no priority indebtedness outstanding.
OTP, under its financial covenants, may not permit its ratio of interest-bearing debt to total capitalization to exceed 0.60 to 1.00, may not permit its interest and dividend coverage ratio to be less than 1.50 to 1.00, and may not permit its priority debtindebtedness to exceed 20 percent of its total capitalization. As of SeptemberJune 30, 2022,2023, OTP's interest-bearing debt to total capitalization was 0.450.46 to 1.00, OTP's interest and dividend coverage ratio was 3.65 to 1.00, and OTP had no priority indebtedness outstanding.
CRITICAL ACCOUNTING POLICIES INVOLVING SIGNIFICANT ESTIMATES
The discussion and analysis of our results of operations are based on financial statements prepared in accordance with generally accepted accounting principles in the United States of America. Certain of our accounting policies require management to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosuredisclosures of contingent assets and liabilities in the
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preparation of our consolidated financial statements. We have disclosed in our Annual Report on Form 10-K for the year ended December 31, 20212022 the critical accounting policies that affect our most significant estimates and assumptions used in preparing our consolidated financial statements. There have been no material changes to our critical accounting policies and estimates from those disclosed in the most recent Annual Report on Form 10-K.10-K.
ITEM 3.QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
There have been no material changes in our market risk from those disclosed in Item 7A, Quantitative and Qualitative Disclosures About Market Risk, in our Annual Report on Form 10-K for the year ended December 31, 2021.2022.
ITEM 4.CONTROLS AND PROCEDURES
Evaluation of Disclosure Controls and Procedures. Under the supervision and with the participation of the Company’s management, including the Chief Executive Officer and the Chief Financial Officer, we evaluated the effectiveness of the design and operation of our disclosure controls and procedures (as defined in Rule 13a-15(e) under the Securities Exchange Act of 1934 (the Exchange Act)) as of SeptemberJune 30, 2022,2023, the end of the period covered by this report. Based on that evaluation, the Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures were effective as of SeptemberJune 30, 2022.2023.
Changes in Internal Control over Financial Reporting. There were no changes in our internal control over financial reporting (as defined in Rules 13a-15(f) under the Exchange Act) during the quarter ended SeptemberJune 30, 20222023 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.
PART II. OTHER INFORMATION
ITEM 1.LEGAL PROCEEDINGS
We are the subject of various legal and regulatory proceedings in the ordinary course of our business. Such matters are subject to many uncertainties and to outcomes that are not predictable with assurance. We record a liability in our consolidated financial statements for costs related to claims, including future legal costs, settlements and judgments, where we have assessed that a loss is probable, and an amount can be reasonably estimated. Material proceedings are described under Note 9, Commitments and Contingencies, to the consolidated financial statements, and in Management's Discussion and Analysis of Financial Condition and Results of Operations, Regulatory Rate Matters.
ITEM 1A.RISK FACTORS
There have been no material changes from the risk factors disclosed in Item 1A, Risk Factors, of our Annual Report on Form 10-K for the year ended December 31, 2021.2022.
ITEM 5.OTHER INFORMATION
Securities Trading Plans of Directors and Executive Officers. During the three months ended June 30, 2023, none of our directors or executive officers adopted, amended, or terminated any contract, instruction or written plan for the purchase or sale of our securities that was intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) or any “non-Rule 10b5-1 trading arrangement.”
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ITEM 6.EXHIBITS
The following Exhibits are filed as part of, or incorporated by reference into, this report.
 No.Description
10.1
10.2
10.3
31.1
31.2
32.1
32.2
101.SCH—Inline XBRL Taxonomy Extension Schema Document
101.CAL—Inline XBRL Taxonomy Extension Calculation Linkbase Document
101.LAB—Inline XBRL Taxonomy Extension Label Linkbase Document
101.PRE—Inline XBRL Taxonomy Extension Presentation Linkbase Document
101.DEF—Inline XBRL Taxonomy Extension Definition Linkbase Document
104—Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101)

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SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.
 OTTER TAIL CORPORATION
By:/s/ Kevin G. Moug
  Kevin G. Moug
Chief Financial Officer and Senior Vice President
(duly authorized officer and principal financial officer)
 Dated: NovemberAugust 2, 20222023
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