EX-99.1 UNAUDITED PRO FORMA COMBINED FINANCIAL INFORMATION WPL Holdings, Inc. (WPLH), IES Industries Inc. (IES), Interstate Power Company (IPC), and certain related parties have entered into an Agreement and Plan of Merger, dated as of November 10, 1995, as amended (the Merger Agreement), providing for (a) the merger of IES with and into WPLH and (b) the merger of IPC with a subsidiary of WPLH pursuant to which IPC will become a subsidiary of WPLH (the above referenced mergers are collectively referred herein to as the Mergers). In connection with the consummation of the Mergers, WPLH will change its name to Interstate Energy Corporation. Detailed information with respect to the Merger Agreement and the proposed Mergers is contained in the Joint Proxy Statement/Prospectus, dated July 11, 1996, as supplemented by the Supplement to Joint Proxy Statement/Prospectus, dated August 21, 1996, contained in IPC's Registration Statements on Form S-4, Registration Nos. 333-07931 and 333-10401 relating to the meetings of shareowners of WPLH, IES and IPC to vote on the Merger Agreement and related matters. The following unaudited pro forma financial information combines the historical consolidated balance sheets and statements of income of WPLH, IES and IPC, including their respective subsidiaries, after giving effect to the Mergers. The historical data for WPLH have been adjusted to reflect the restatement of such data to account for certain discontinued operations discussed in the notes hereto. The unaudited pro forma combined balance sheet at December 31, 1996, gives effect to the Mergers as if they had occurred at December 31, 1996. The unaudited pro forma combined statements of income for each of the three years in the period ended December 31, 1996, give effect to the Mergers as if they had occurred at January 1, 1994. These statements are prepared on the basis of accounting for the Mergers as a pooling of interests and are based on the assumptions set forth in the notes thereto. In addition, the pro forma financial information does not give effect to the expected synergies or the cost to be incurred to achieve such synergies. The pro forma financial information, however, does reflect the transaction costs to effect the Mergers. The following pro forma financial information has been prepared from, and should be read in conjunction with, the historical consolidated financial statements and related notes thereto of WPLH, IES and IPC. The following information is not necessarily indicative of the financial position or operating results that would have occurred had the Mergers been consummated on the date, or at the beginning of the periods, for which the Mergers are being given effect nor is it necessarily indicative of future operating results or financial position. INTERSTATE ENERGY CORPORATION UNAUDITED PRO FORMA COMBINED BALANCE SHEET December 31, 1996 (In thousands) ASSETS WPLH IES IPC Pro Pro (As (As (As Forma Forma Reported) Reported) Reported) Adj. Combined UTILITY PLANT Electric $1,729,311 $2,007,839 $853,007 $--- $4,590,157 Gas 227,809 175,472 68,047 --- 471,328 Other 175,998 126,850 --- --- 302,848 Total 2,133,118 2,310,161 921,054 --- 5,364,333 Accumulated provision for depreciation 967,436 1,030,390 426,471 --- 2,424,297 Construction work in progress 55,519 43,719 3,129 --- 102,367 Nuclear fuel--net 19,368 34,725 --- --- 54,093 Net utility plant 1,240,569 1,358,215 497,712 --- 3,096,496 OTHER PROPERTY, PLANT AND EQUIPMENT--NET AND INVESTMENTS (NOTE 8) 144,671 314,071 453 --- 459,195 CURRENT ASSETS Cash and cash equivalents 11,070 8,675 3,072 --- 22,817 Accounts receivable-- net 88,798 62,861 28,227 --- 179,886 Fossil fuel inventories, at average cost 15,841 13,323 16,623 --- 45,787 Materials and supplies, at average cost 29,907 22,842 6,214 --- 58,963 Prepayments and other 26,786 70,350 13,497 --- 110,633 Total current assets 172,402 178,051 67,633 --- 418,086 EXTERNAL DECOMMISSIONING FUND 90,671 59,325 --- --- 149,996 DEFERRED CHARGES AND OTHER 252,218 215,900 73,402 --- 541,520 TOTAL ASSETS $1,900,531 $2,125,562 $639,200 $--- $4,665,293 See accompanying Notes to Unaudited Pro Forma Combined Financial Statements. INTERSTATE ENERGY CORPORATION UNAUDITED PRO FORMA COMBINED BALANCE SHEET (Continued) December 31, 1996 (In thousands) WPLH IES IPC Pro Pro (As (As (As Forma Forma Reported) Reported) Reported) Adj. Combined LIABILITIES AND EQUITY CAPITALIZATION Common Stock Equity: Common Stock (Note 1) $308 $407,635 $33,848 ($441,033) $758 Other stockholders' equity (Note 1) 607,047 219,246 172,210 430,033 1,428,536 Total common stock equity 607,355 626,881 206,058 (11,000) 1,429,294 Preferred stock not mandatorily redeemable 59,963 18,320 10,819 --- 89,102 Preferred stock mandatory sinking fund --- --- 24,147 --- 24,147 Long-term debt--net 362,564 701,100 171,731 --- 1,235,395 Total capitalization 1,029,882 1,346,301 412,755 (11,000) 2,777,938 CURRENT LIABILITIES Current maturities, sinking funds, and capital lease obligations 67,626 23,598 17,000 --- 108,224 Commercial paper, notes payable and other 102,779 135,000 28,700 --- 266,479 Variable rate demand bonds 56,975 --- --- --- 56,975 Accounts payable and accruals 120,986 99,861 14,013 --- 234,860 Taxes accrued 4,669 43,926 16,953 --- 65,548 Other accrued liabilities 54,303 54,498 11,785 11,000 131,586 Total current liabilities 407,338 356,883 88,451 11,000 863,672 OTHER LIABILITIES Deferred income taxes 245,686 262,675 99,303 --- 607,664 Deferred investment tax credits 36,931 34,470 17,013 --- 88,414 Accrued environmental remediation costs 74,075 47,502 7,234 --- 128,811 Capital lease obligations --- 19,600 --- --- 19,600 Other liabilities and deferred credits 106,619 58,131 14,444 --- 179,194 Total other liabilities 463,311 422,378 137,994 --- 1,023,683 TOTAL CAPITALIZATION AND LIABILITIES $1,900,531 $2,125,562 $639,200 $ --- $4,665,293 See accompanying Notes to Unaudited Pro Forma Combined Financial Statements INTERSTATE ENERGY CORPORATION UNAUDITED PRO FORMA COMBINED STATEMENTS OF INCOME YEAR ENDED DECEMBER 31, 1996 (In thousands, except per share amounts) WPLH IES IPC Pro Pro (As (As (As Forma Forma Reported) Reported) Reported) Adj. Combined Operating Revenues Electric $589,482 $574,273 $276,620 $--- $1,440,375 Gas 165,627 273,979 49,464 --- 489,070 Other 177,735 125,660 --- --- 303,395 Total operating revenues 932,844 973,912 326,084 --- 2,232,840 Operating Expenses Electric production fuels 114,470 84,579 57,560 --- 256,609 Purchased power 81,108 88,350 61,556 --- 231,014 Cost of gas sold 104,830 217,351 31,617 --- 353,798 Other operation 319,154 214,759 53,134 --- 587,047 Maintenance 46,492 49,001 16,164 --- 111,657 Depreciation and amortization 90,683 107,393 31,087 --- 229,163 Taxes other than income taxes 34,603 48,171 16,064 --- 98,838 Total operating expenses 791,340 809,604 267,182 --- 1,868,126 Operating Income 141,504 164,308 58,902 --- 364,714 Other Income (Expense) Allowance for equity funds used during construction 2,270 (100) 13 --- 2,183 Other income and deductions---net 15,644 (2,333) 3,763 --- 17,074 Total other income (expense) 17,914 (2,433) 3,776 --- 19,257 Interest Charges 41,089 52,619 16,222 --- 109,930 Income from continuing operations before income taxes and preferred dividends 118,329 109,256 46,456 --- 274,041 Income Taxes 41,814 47,435 18,133 --- 107,382 Preferred dividends of subsidiaries (Note 2) 3,310 914 2,463 --- 6,687 Income from continuing Operations (Notes 3 and 6) $73,205 $60,907 $25,860 $--- $159,972 Average Common Shares Outstanding (Note 1) 30,790 29,861 9,594 5,236 75,481 Earnings per share of Common Stock from continuing operations 2.38 2.04 2.69 $--- 2.12 See accompanying Notes to Unaudited Pro Forma Combined Financial Statements INTERSTATE ENERGY CORPORATION UNAUDITED PRO FORMA COMBINED STATEMENTS OF INCOME YEAR ENDED DECEMBER 31, 1995 (In thousands, except per share amounts) WPLH IES IPC Pro Pro (As (As (As Forma Forma Reported) Reported) Reported) Adj. Combined Operating Revenues Electric $546,324 $560,471 $274,873 $--- $1,381,668 Gas 139,165 190,339 43,669 --- 373,173 Other 121,766 100,200 --- --- 221,966 Total operating revenues 807,255 851,010 318,542 --- 1,976,807 Operating Expenses Electric production fuels 116,488 96,256 62,164 --- 274,908 Purchased power 44,940 66,874 57,566 --- 169,380 Cost of gas sold 84,002 141,716 25,888 --- 251,606 Other operation 253,277 201,390 45,717 --- 500,384 Maintenance 42,043 46,093 14,881 --- 103,017 Depreciation and amortization 86,319 97,958 29,560 --- 213,837 Taxes other than income taxes 34,188 49,011 15,990 --- 99,189 Total operating expenses 661,257 699,298 251,766 --- 1,612,321 Operating Income 145,998 151,712 66,776 --- 364,486 Other Income (Expense) Allowance for equity funds used during construction 1,425 386 --- --- 1,811 Other income and deductions---net 6,509 3,170 (2,872) --- 6,807 Total other income (expense) 7,934 3,556 (2,872) --- 8,618 Interest Charges 42,896 47,689 16,795 --- 107,380 Income from continuing operations before income taxes and preferred dividends 111,036 107,579 47,109 --- 265,724 Income Taxes 36,108 42,489 19,453 --- 98,050 Preferred dividends of subsidiaries (Note 2) 3,310 914 2,458 --- 6,682 Income from continuing Operations (Notes 3 and 6) $71,618 $64,176 $25,198 $--- $160,992 Average Common Shares Outstanding (Note 1) 30,774 29,202 9,564 5,140 74,680 Earnings per share of Common Stock from continuing operations $2.33 $2.20 $2.63 $--- $2.16 See accompanying Notes to Unaudited Pro Forma Combined Financial Statements INTERSTATE ENERGY CORPORATION UNAUDITED PRO FORMA COMBINED STATEMENTS OF INCOME YEAR ENDED DECEMBER 31, 1994 (In thousands, except per share amounts) WPLH IES IPC Pro Pro (As (As (As Forma Forma Reported) Reported) Reported) Adj. Combined Operating Revenues Electric $531,747 $537,327 $261,730 $--- $1,330,804 Gas 151,931 165,569 45,920 --- 363,420 Other 112,039 82,968 --- --- 195,007 Total operating revenues 795,717 785,864 307,650 --- 1,889,231 Operating Expenses Electric production fuels 123,469 85,952 61,384 --- 270,805 Purchased power 37,913 68,794 58,339 --- 165,046 Cost of gas sold 100,942 120,795 30,905 --- 252,642 Other operation 248,847 176,863 51,917 --- 477,627 Maintenance 41,227 52,841 17,160 --- 111,228 Depreciation and amortization 80,351 86,378 28,212 --- 194,941 Taxes other than income taxes 33,788 46,308 16,298 --- 96,394 Total operating expenses 666,537 637,931 264,215 --- 1,568,683 Operating Income 129,180 147,933 43,435 --- 320,548 Other Income (Expense) Allowance for equity funds used during construction 3,009 2,299 166 --- 5,474 Other income and deductions---net 10,245 3,472 3,100 --- 16,817 Total other income (expense) 13,254 5,771 3,266 --- 22,291 Interest Charges 36,657 44,399 16,845 --- 97,901 Income from continuing operations before income taxes and preferred dividends 105,777 109,305 29,856 --- 244,938 Income Taxes 36,043 41,573 9,189 --- 86,805 Preferred dividends of subsidiaries (Note 2) 3,310 914 2,454 --- 6,678 Income from continuing Operations (Notes 3 and 6) $66,424 $66,818 $ 18,213 $--- $ 151,455 Average Common Shares Outstanding (Note 1) 30,671 28,560 9,479 5,041 73,751 Earnings per share of Common Stock from continuing operations $2.17 $2.34 $1.92 $--- $2.05 See accompanying Notes to Unaudited Pro Forma Combined Financial Statements INTERSTATE ENERGY CORPORATION NOTES TO UNAUDITED PRO FORMA COMBINED FINANCIAL STATEMENTS 1. The pro forma combined financial statements reflect the conversion of each share of IES Common Stock (no par value) outstanding into 1.14 shares of WPLH Common Stock ($.01 par value) and the conversion of each share of IPC Common Stock ($3.50 par value) into 1.11 shares of WPLH Common Stock ($.01 par value), and the continuation of each share of WPLH Common Stock ($.01 par value) outstanding as one share of Interstate Energy Common Stock, as provided in the Merger Agreement. The pro forma adjustment to common stock equity restates the common stock account to equal par value for all shares to be issued ($.01 par value per share of Interstate Energy Common Stock) and reclassifies the excess to other stockholders' equity. The pro forma combined statements of income are presented as if the companies were combined on January 1, 1994. The pro forma combined balance sheet gives effect to the Mergers as if they occurred at December 31, 1996. The number of shares of common stock used for calculating per share amounts is based on the exchange ratio shown below. As Pro As Pro As Pro Exchange reported forma reported forma reported forma Ratio 12/31/96 12/31/96 12/31/95 12/31/95 12/31/94 12/31/94 IES 1.14 29,861 34,042 29,202 33,290 28,560 32,558 IPC 1.11 9,594 10,649 9,564 10,616 9,479 10,522 WPLH N/A 30,790 30,790 30,774 30,774 30,671 30,671 2. The Preferred Stock of IPC has been reclassified in the pro forma statements as preferred stock of subsidiary companies and deducted in the determination of income from continuing operations which reflects the holding company structure of the entity formed through the Mergers. 3. IES's income from continuing operations for the year ended December 31, 1996, included costs incurred relating to its successful defense of a hostile takeover attempt mounted by MidAmerican Energy Company. The after-tax impact on income from continuing operations was a decrease of $4.6 million. Nonrecurring items affecting WPLH's performance for the year ended December 31, 1996, included the impact of the sale of a combustion turbine and the sale of WPLH's assisted-living real estate investments. The after-tax impact of these items on continuing operations was an increase of $5.9 million. Nonrecurring items affecting WPLH's 1994 performance included the impact of early retirement and severance programs and the reversal of a coal contract penalty assessed by the Wisconsin Public Service Commission which was charged to income in 1989. The net after-tax impact of these items on income from continuing operations for the year ended December 31, 1994, was a decrease of $8.3 million related to the early retirement and severance programs offset by an increase of $4.9 million related to the coal contract penalty reversal. 4. The allocation between WPLH, IES and IPC and their customers of the estimated cost savings of approximately $749 million over ten years resulting from the Mergers, net of the costs incurred to achieve such savings, will be subject to regulatory review and approval. Costs arising from the proposed Mergers are currently estimated to be approximately $78 million (including transaction costs of $11 million related to fees for financial advisors, attorneys, accountants and consultants). The estimate of potential cost savings constitutes a forward-looking statement and actual results may differ materially from this estimate. The estimate is necessarily based upon various assumptions that involve judgments with respect to, among other things, future national and regional economic and competitive conditions, technological developments, inflation rates, regulatory treatments, weather conditions, financial market conditions, future business decisions and other uncertainties. No assurance can be given that the estimated cost savings will actually be realized. In addition to the $11 million remaining transaction costs, since the announcement of the Merger Agreement on November 11, 1995, IES, IPC and WPLH have collectively incurred $6 million of merger-related transaction costs through December 31, 1996, which have been expensed and are reflected in the combined income statements as presented. The remaining merger-related $11 million of transaction costs have been reflected in the pro forma balance sheet at December 31, 1996, such that shareowners' equity has been reduced by $11 million and accrued liabilities have been increased by $11 million. None of the estimated cost savings, or costs to achieve such savings, have been reflected in the pro forma combined financial statements. 5. Intercompany transactions (including purchased and exchange power transactions) between WPLH, IES and IPC during the periods presented were included in the determination of regulated rates and were not material. Accordingly, no pro forma adjustments were made to eliminate such transactions. 6. The financial statements of WPLH reflect the discontinuance of operations of its utility energy and marketing consulting business in 1995. The discontinuance of this business resulted in a pre-tax loss in the fourth quarter of 1995 of $7.7 million. The after-tax loss on disposition was $11.0 million reflecting the associated tax expense on disposition due to the non-deductibility of the carrying value of goodwill at sale. During 1996, WPLH recognized an additional loss of $1.3 million, net of applicable income tax benefit, associated with the final disposition of the business. Operating revenues, operating expenses, other income and expense and income taxes for the discontinued operations for the time periods presented have been excluded from income from continuing operations. Interest expense has been adjusted for the amounts associated with direct obligations of the discontinued operations. Operating revenues, related losses, and income tax benefits associated with the discontinued operations for the years ending December 31 were are follows: 1995 1994 Operating revenues $24,979 $34,798 Loss from discontinued operations before income tax $ 3,663 $ 1,806 Income tax benefit 1,451 632 Loss from discontinued operations $ 2,212 $ 1,174 7. Accounting principles have been consistently applied in the financial statement presentations for WPLH, IES and IPC with one exception. IPC does not include unbilled electric and gas revenues in its calculation of total revenues. The utility subsidiaries of WPLH and IES accrue unbilled revenues. The impact of this difference in accounting principles among the companies does not have a material impact on the unaudited pro forma combined financial statements as presented and, accordingly, no adjustments have been made to conform to accounting principles. 8. At December 31, 1996, IES had a $20.0 million investment in Class A common stock of McLeod, Inc. (McLeod), a $9.2 million investment in Class B common stock and vested options that, if exercised, would represent an additional investment of approximately $2.3 million. McLeod provides local, long-distance and other telecommunications services. McLeod completed an Initial Public Offering (IPO) of its Class A common stock in June 1996 and a secondary offering in November 1996. As of December 31, 1996, IES is the beneficial owner of approximately 10.6 million total shares on a fully diluted basis. Class B shares are convertible at the option of IES into Class A shares at any time on a one-for-one basis. The rights of McLeod Class A common stock and Class B common stock are substantially identical except that Class A common stock has 1 vote per share and Class B common stock has 0.40 vote per share. IES currently accounts for this investment under the cost method. IES has entered into an agreement with McLeod which provides that for two years commencing on June 10, 1996, IES cannot sell or otherwise dispose of any of its securities of McLeod without the consent of the McLeod Board of Directors. This contractual sale restriction results in restricted stock under the provisions of Statement of Financial Accounting Standards No. 115 (SFAS No. 115), Accounting for Certain Investments in Debt and Equity Securities, until such time as the restrictions lapse and such shares become qualified for sale within a one year period. As a result, IES currently carries this investment at cost. The closing price of the McLeod Class A common stock on December 31, 1996, on the Nasdaq National Market was $25.50 per share. The current market value of the shares IES beneficially owns (approximately 10.6 million shares) is currently impacted by, among other things, the fact that the shares cannot be sold for a period of time and it is not possible to estimate what the market value of the shares will be at the point in time such sale restrictions are lifted. In addition, any gain upon an eventual sale of this investment would likely be subject to a tax. Under the provisions of SFAS No. 115, the carrying value of the McLeod investment will be adjusted to estimated fair value at the time such shares become qualified for sale within a one year period; this will occur on June 10, 1997, which is one year before the contractual restrictions on sale are lifted. At that time, the adjustment to reflect the estimated fair value of this investment will be reflected as an increase in the investment carrying value with the unrealized gain reported as a net of tax amount in other common shareholders' equity until realized (i.e. until the shares are sold by IES).