Alliant Energy Announces Third Quarter 2012 Results, 2013 Earnings Guidance and Increased Annual Common Stock Dividend Target for 2013 Updates 2012 earnings guidance and forecasted 2012 - 2016 capital expenditures PR Newswire MADISON, Wis., Nov. 9, 2012 MADISON, Wis., Nov.9, 2012 /PRNewswire/ --Alliant Energy Corporation (NYSE: LNT) today announced third quarter U.S. generally accepted accounting principles (GAAP) and non-GAAP consolidated earnings per share (EPS) from continuing operations as follows: Adjusted (non-GAAP) EPS from GAAP EPS from Continuing Continuing Operations Operations Q3 2012 Q3 2011 Q3 2012 Q3 2011 Utility and Corporate $1.45 $1.37 $1.45 $1.35 Services Non-regulated and (0.11) (0.12) (0.11) (0.12) Parent Alliant Energy $1.34 $1.25 $1.34 $1.23 Consolidated "The utilities and non-regulated businesses have produced solid results for both the quarter and year-to-date. With one quarter remaining in 2012, we have narrowed our 2012 annual earnings guidance to the top half of the previous range," said Patricia Kampling, Alliant Energy Chairman, President and CEO. Utility and Corporate Services - Alliant Energy's Utility and Alliant Energy Corporate Services, Inc. (Corporate Services) operations generated $1.45 per share of non-GAAP EPS from continuing operations in the third quarter of 2012, which was $0.08 per share higher than the third quarter of 2011. Warmer weather in the third quarter of 2012, when compared to the third quarter of 2011, led to higher electric sales to customers, positively impacting Alliant Energy's utility business. Higher income from Interstate Power and Light Company's (IPL's) tax benefit rider also impacted third quarter earnings, but is not expected to have a material impact on 2012 total year earnings. These positive EPS drivers were partially offset by higher depreciation and nuclear purchased power capacity expense. Non-regulated and Parent - Alliant Energy's non-regulated and parent operations generated ($0.11) per share of non-GAAP EPS from continuing operations in the third quarter of 2012, which was $0.01 per share higher than the third quarter of 2011. Earnings for Alliant Energy's non-regulated and parent businesses for the third quarters of 2012 and 2011 were negatively impacted by the timing of tax expense at the parent primarily due to IPL's tax benefit rider. The increase in EPS was primarily due to higher earnings generated by Alliant Energy's Transportation business. Earnings Adjustments - Third quarter 2011 GAAP earnings were adjusted to exclude $2.1 million ($0.02 per share) of charges for emission allowance contracts impacted by the Cross-State Air Pollution Rule. Non-GAAP adjustments, which relate to material charges or income that are not normally associated with ongoing operations, are provided as a supplement to results reported in accordance with GAAP. Details regarding GAAP EPS from continuing operations variances between the third quarters of 2012 and 2011 for Alliant Energy's operations are as follows: Q3 GAAP EPS 2012 2011 Utility and Corporate Services $1.45 $1.35 Non-regulated and Parent (0.11) (0.12) Alliant Energy Consolidated $1.34 $1.23 Q3 2012 Q3 2011 Variance Utility and Corporate Services operations: Electric tax benefit rider impact at IPL (timing $0.18 $0.12 $0.06 between quarters) Positive weather impact on electric sales 0.20 0.16 0.04 WPL retail fuel cost recoveries 0.01 (0.02) 0.03 Charges for emission allowance contracts in Q3 2011 — (0.02) 0.02 AFUDC related to emission control projects at WPL 0.02 — 0.02 in Q3 2012 Capacity charges for nuclear purchased power (0.31) (0.29) (0.02) agreements Contract cancellation charge at IPL in Q3 2012 (0.02) — (0.02) Higher depreciation expense (0.02) Other (0.01) Total Utility and Corporate Services operations $0.10 Non-regulated and Parent operations: Electric tax benefit rider impact at Parent (timing ($0.12) ($0.10) ($0.02) between quarters) Other effective tax rate adjustments at Parent (0.03) (0.05) 0.02 (timing between quarters) Other (includes Transportation business results) 0.01 Total Non-regulated and Parent operations $0.01 Electric tax benefit rider - In February 2011, IPL received a rate order from the Iowa Utilities Board authorizing IPL to implement its proposed electric tax benefit rider, which utilizes income tax benefits from certain tax initiatives to provide retail electric customers in Iowa credits on their electric bills. These credits on customers' electric bills reduced IPL's electric revenues by $61 million during 2011 and are expected to reduce IPL's electric revenues by approximately $80 million during calendar year 2012. The electric tax benefit rider also results in an equivalent reduction in IPL's income tax expense from the benefits of the tax initiatives, resulting in no material impact on 2011 and 2012 total year EPS. While the electric tax benefit rider is not expected to have a material impact on total year EPS, it does result in considerable quarter-over-quarter variation in EPS at IPL as well as the Parent. The credit on customer bills is based on kilowatt-hour usage, which is fairly consistent throughout the year. However, the offsetting tax benefits are recorded as a percentage of expected earnings for IPL and for Alliant Energy each quarter, which fluctuates significantly causing the considerable quarter-over-quarter variation. The following table shows the estimated quarterly impacts of the electric tax benefit rider on EPS at IPL and the Parent for 2012 and 2011: Q1-12 Q2-12 Q3-12 Q4-12 2012 IPL ($0.09) ($0.05) $0.18 ($0.04) $— Parent 0.06 0.04 (0.12) 0.02 — ($0.03) ($0.01) $0.06 ($0.02) $— Q1-11 Q2-11 Q3-11 Q4-11 2011 IPL $0.02 ($0.09) $0.12 ($0.05) $— Parent 0.02 0.04 (0.10) 0.04 — $0.04 ($0.05) $0.02 ($0.01) $— 2012 Earnings Guidance Alliant Energy is narrowing its 2012 earnings guidance, which excludes a charge of $0.14 per share associated with state tax apportionment changes at the utilities resulting from the planned sale of RMT and non-recurring regulatory-related credits of $0.02 per share from the PSCW rate case decision discussed in the first and second quarter releases. Revised Previous Utility and Corporate Services $2.75 - $2.85 $2.65 - $2.85 Non-regulated and Parent 0.15 - 0.20 0.10 - 0.20 Alliant Energy Consolidated $2.90 - $3.05 $2.75 - $3.05 The 2012 earnings guidance does not include the impacts of any non-cash valuation adjustments, regulatory-related charges or credits, reorganization or restructuring charges, discontinued operations, changes in laws or regulations, adjustments made to deferred tax assets and liabilities from valuation allowances and state apportionment assumptions, pending lawsuits and disputes, federal and state income tax audits and other Internal Revenue Service proceedings or changes in accounting principles that may impact the reported results of Alliant Energy. Drivers for Alliant Energy's 2012 earnings guidance include, but are not limited to: oStable economy and resulting implications on utility sales oNormal weather and operating conditions in its utility service territories for the remainder of the year oAbility of IPL and WPL to earn their authorized rates of return oIncome tax benefits at IPL from tax initiatives oContinuing cost controls and operational efficiencies oExecution of IPL's, WPL's and Alliant Energy Resources, LLC's (Resources') capital expenditure plans oRMT sale execution oConsolidated effective tax rate of 20% (excluding the impacts of the non-recurring state income tax charge) 2013 Earnings Guidance Alliant Energy is issuing the following earnings guidance for 2013: Utility and Corporate Services $2.90 - $3.10 Non-regulated and Parent 0.05 - 0.15 Alliant Energy Consolidated $2.95 - $3.25 "In 2013, we expect to see the earnings benefit of increasing WPL rate base and AFUDC resulting from utility investments, as well as benefits from our numerous tax initiatives," said Kampling. "However, we expect a decline in non-regulated earnings for 2013 due to operating losses from our Franklin County wind project." The 2013 earnings guidance does not include the impacts of any non-cash valuation adjustments, regulatory-related charges or credits, reorganization or restructuring charges, discontinued operations, changes in laws or regulations, adjustments made to deferred tax assets and liabilities from valuation allowances and state apportionment assumptions, pending lawsuits and disputes, federal and state income tax audits and other Internal Revenue Service proceedings or changes in accounting principles that may impact the reported results of Alliant Energy. Drivers for Alliant Energy's 2013 earnings guidance include, but are not limited to: oStable economy and resulting implications on utility sales oNormal weather and operating conditions in its utility service territories oAbility of IPL and WPL to earn their authorized rates of return oRegulatory decisions impacting earnings at IPL from tax initiatives oAbility of WPL to recover future purchased power, fuel and fuel-related costs through rates in a timely manner oContinuing cost controls and operational efficiencies oExecution of IPL's and WPL's capital expenditure plans oConsolidated effective tax rate of 14% 2013 Annual Common Stock Dividend Target Alliant Energy's Board of Directors approved an 8 cent increase in its 2013 expected annual common stock dividend target to $1.88 per share from the current annual dividend target of $1.80 per share. Payment of the 2013 quarterly dividends is subject to the actual dividend declaration by the Board of Directors, which is expected in January 2013 for the first quarter dividend. Projected Capital Expenditures Alliant Energy has updated its projected capital expenditures for 2012 through 2016 as follows (in millions): 2012 2013 2014 2015 2016 Utility business (a): WPL gas - Riverside acquisition $395 $— $— $— $— IPL gas - new facility 5 10 100 325 200 Total Generation - new facilities 400 10 100 325 200 Environmental 290 355 210 200 165 Generation performance improvements 20 35 75 25 45 Other utility capital expenditures 335 380 410 405 410 Total utility business 1,045 780 795 955 820 Corporate Services (b) 60 40 45 30 20 Resources wind - Franklin County (b) 65 5 15 — — Other (b) 10 10 5 5 5 $1,180 $835 $860 $990 $845 Cost estimates represent IPL's and WPL's estimated portion of total (a) escalated construction and acquisition expenditures and exclude AFUDC, if applicable. (b) Cost estimates represent total escalated construction expenditures and exclude capitalized interest. Earnings Conference Call A conference call to review the third quarter of 2012 results, revised 2012 earnings guidance, 2013 earnings guidance and projected capital expenditures is scheduled for Friday, November 9th at 9:00 a.m. central time. Alliant Energy Chairman, President and Chief Executive Officer Patricia Kampling and Chief Financial Officer Tom Hanson will host the call. The conference call is open to the public and can be accessed in two ways. Interested parties may listen to the call by dialing 888-221-9591 (United States or Canada) or 913-312-1434 (International), passcode 8244179. Interested parties may also listen to a webcast at www.alliantenergy.com/investors. In conjunction with the information in this earnings announcement and the conference call, Alliant Energy posted supplemental materials on its website. A replay of the call will be available through November 16, 2012, at 888-203-1112 (United States or Canada) or 719-457-0820 (International), passcode 8244179. An archive of the webcast will be available on the Company's Web site at www.alliantenergy.com/investors for 12 months. Alliant Energy is the parent company of two public utility companies - Interstate Power and Light Company and Wisconsin Power and Light Company - and of Alliant Energy Resources, LLC, the parent company of Alliant Energy's non-regulated operations. Alliant Energy is an energy-services provider with utility subsidiaries serving approximately 1 million electric and 414,000 natural gas customers. Providing its customers in the Midwest with regulated electricity and natural gas service is the Company's primary focus. Alliant Energy, headquartered in Madison, Wis., is a Fortune 1000 company traded on the New York Stock Exchange under the symbol LNT. For more information, visit the Company's Web site at www.alliantenergy.com. This press release includes forward-looking statements. These forward-looking statements can be identified as such because the statements include words such as "expect," "anticipate," "plan," or other words of similar import. Similarly, statements that describe future financial performance or plans or strategies are forward-looking statements. Such forward looking statements are subject to certain risks and uncertainties that could cause actual results to differ materially from those expressed in, or implied by, such statements. Actual results could be materially affected by the following factors, among others: ofederal and state regulatory or governmental actions, including the impact of energy, tax, financial and health care legislation, and of regulatory agency orders; oIPL's and WPL's ability to obtain adequate and timely rate relief to allow for, among other things, the recovery of operating costs, fuel costs, transmission costs, deferred expenditures, capital expenditures, and remaining costs related to generating units that may be permanently closed, earning their authorized rates of return, and the payments to their parent of expected levels of dividends; oweather effects on results of utility operations including impacts of temperature changes and drought conditions in IPL's and WPL's service territories on customers' demand for electricity and gas; othe ability to continue cost controls and operational efficiencies; othe impact of IPL's retail electric base rate freeze in Iowa through 2013; othe impact of WPL's retail electric and gas base rate freeze in Wisconsin during 2013 and 2014; othe state of the economy in IPL's and WPL's service territories and resulting implications on sales, margins and ability to collect unpaid bills; odevelopments that adversely impact Alliant Energy's, IPL's and WPL's ability to implement their strategic plans, including unanticipated issues with new emission control equipment for various coal-fired generating facilities of IPL and WPL, WPL's purchase of the Riverside Energy Center, IPL's construction of a new natural gas-fired electric generating facility in Iowa, IPL's new PPA with NextEra Energy Resources, LLC, Alliant Energy Resources, LLC's construction of and selling price of the electricity output from its new 100 megawatt Franklin County wind project, and the potential decommissioning of certain generating facilities of IPL and WPL; oissues related to the availability of generating facilities and the supply and delivery of fuel and purchased electricity and the price thereof, including the ability to recover and to retain the recovery of purchased power, fuel and fuel-related costs through rates in a timely manner; othe impact that fuel and fuel-related prices may have on IPL's and WPL's customers' demand for utility services; othe ability to defend against environmental claims brought by state and federal agencies, such as the U.S. Environmental Protection Agency, or third parties, such as the Sierra Club; oissues associated with environmental remediation efforts and with environmental compliance generally, including changing environmental laws and regulations and litigation associated with changing environmental laws and regulations; othe ability to recover through rates all environmental compliance and remediation costs, including costs for projects put on hold due to uncertainty of future environmental laws and regulations; oimpacts of future tax benefits from deductions for repairs expenditures and mixed service costs and temporary differences from historical tax benefits from such deductions that are reversing into income tax expense in future periods; othe impact of changes to government incentive elections for wind projects; othe ability to find a purchaser for RMT, to successfully negotiate a purchase agreement and to close the sale of RMT; ocontinued access to the capital markets on competitive terms and rates, and the actions of credit rating agencies; oinflation and interest rates; ochanges to the creditworthiness of counterparties with which Alliant Energy, IPL and WPL have contractual arrangements, including participants in the energy markets and fuel suppliers and transporters; oissues related to electric transmission, including operating in Regional Transmission Organization (RTO) energy and ancillary services markets, the impacts of potential future billing adjustments and cost allocation changes from RTOs and recovery of costs incurred; ounplanned outages, transmission constraints or operational issues impacting fossil or renewable generating facilities and risks related to recovery of resulting incremental costs through rates; oAlliant Energy's ability to successfully pursue appropriate appeals with respect to, and any liabilities arising out of, the alleged violation of the Employee Retirement Income Security Act of 1974 by Alliant Energy's Cash Balance Pension Plan; ocurrent or future litigation, regulatory investigations, proceedings or inquiries; oAlliant Energy's ability to sustain its dividend payout ratio goal; oemployee workforce factors, including changes in key executives, collective bargaining agreements and negotiations, work stoppages or additional restructurings; oimpacts that storms or natural disasters in IPL's and WPL's service territories may have on their operations and recovery of, and rate relief for, costs associated with restoration activities; othe direct or indirect effects resulting from terrorist incidents, including cyber terrorism, or responses to such incidents; oaccess to technological developments; oany material post-closing adjustments related to any past asset divestitures; omaterial changes in retirement and benefit plan costs; othe impact of incentive compensation plans accruals; othe effect of accounting pronouncements issued periodically by standard-setting bodies; othe impact of adjustments made to deferred tax assets and liabilities from state apportionment assumptions; othe ability to utilize tax credits and net operating losses generated to date, and those that may be generated in the future, before they expire; othe ability to successfully complete tax audits, changes in tax accounting methods and appeals with no material impact on earnings and cash flows; and ofactors listed in the "2012 Earnings Guidance" and "2013 Earnings Guidance" sections of this press release. Without limitation, the expectations with respect to 2012 and 2013 earnings guidance and 2012 - 2016 capital expenditures guidance in this press release are forward-looking statements and are based in part on certain assumptions made by Alliant Energy, some of which are referred to in the forward-looking statements. Alliant Energy cannot provide any assurance that the assumptions referred to in the forward-looking statements or otherwise are accurate or will prove to be correct. Any assumptions that are inaccurate or do not prove to be correct could have a material adverse effect on Alliant Energy's ability to achieve the estimates or other targets included in the forward-looking statements. The forward-looking statements included herein are made as of the date hereof and Alliant Energy undertakes no obligation to update publicly such statements to reflect subsequent events or circumstances. Note: Unless otherwise noted, all "per share" references in this release refer to earnings per diluted share. ALLIANT ENERGY CORPORATION THIRD QUARTER 2012 EARNINGS SUMMARY A summary of Alliant Energy's third quarter 2012 results compared to third quarter 2011 results is as follows: EPS: GAAP EPS Adjustments Non-GAAP EPS Q3 2012 Q3 2011 Q3 2012 Q3 2011 Q3 2012 Q3 2011 IPL $0.93 $0.89 $— $0.02 $0.93 $0.91 WPL 0.51 0.46 — — 0.51 0.46 Corporate Services 0.01 — — — 0.01 — Subtotal for Utility and 1.45 1.35 — 0.02 1.45 1.37 Corporate Services Non-regulated and Parent (0.11) (0.12) — — (0.11) (0.12) EPS from continuing 1.34 1.23 — 0.02 1.34 1.25 operations EPS from discontinued 0.02 (0.13) — — 0.02 (0.13) operations Alliant Energy $1.36 $1.10 $— $0.02 $1.36 $1.12 Consolidated Earnings (in millions): GAAP Income (Loss) Adjustments Non-GAAP Income (Loss) Q3 2012 Q3 2011 Q3 2012 Q3 2011 Q3 2012 Q3 2011 IPL $103.3 $98.3 $— $2.1 $103.3 $100.4 WPL 55.9 50.6 — — 55.9 50.6 Corporate Services 1.3 — — — 1.3 — Subtotal for Utility 160.5 148.9 — 2.1 160.5 151.0 and Corporate Services Non-regulated and (11.5) (12.0) — — (11.5) (12.0) Parent Total earnings from 149.0 136.9 — 2.1 149.0 139.0 continuing operations Income (loss) from 1.7 (14.9) — — 1.7 (14.9) discontinued operations Alliant Energy $150.7 $122.0 $— $2.1 $150.7 $124.1 Consolidated ALLIANT ENERGY CORPORATION CONSOLIDATED STATEMENTS OF INCOME (Unaudited) Three Months Ended Nine Months Ended Sep. 30, Sep. 30, 2012 2011 2012 2011 (dollars in millions) Operating revenues: Utility: Electric $815.3 $796.9 $2,000.3 $2,037.7 Gas 46.8 46.4 263.9 342.5 Other 12.2 15.8 39.7 45.8 Non-regulated 13.3 11.8 39.7 34.6 887.6 870.9 2,343.6 2,460.6 Operating expenses: Utility: Electric production fuel and energy 221.6 215.3 550.4 590.0 purchases Purchased electric capacity 84.0 80.2 216.2 205.2 Electric transmission service 94.9 88.9 255.7 242.6 Cost of gas sold 17.7 19.8 141.1 211.0 Other operation and maintenance 144.7 147.1 432.6 476.6 Non-regulated operation and 3.7 4.7 8.6 13.3 maintenance Depreciation and amortization 83.6 80.7 247.4 240.0 Taxes other than income taxes 23.7 24.8 73.5 74.6 673.9 661.5 1,925.5 2,053.3 Operating income 213.7 209.4 418.1 407.3 Interest expense and other: Interest expense 38.3 38.8 115.8 119.7 Equity income from unconsolidated (10.4) (10.1) (30.4) (29.6) investments, net Allowance for funds used during (5.8) (2.8) (14.4) (8.6) construction Interest income and other (0.7) (0.6) (2.4) (2.2) 21.4 25.3 68.6 79.3 Income from continuing operations 192.3 184.1 349.5 328.0 before income taxes Income taxes 39.3 43.3 83.8 54.5 Income from continuing operations, 153.0 140.8 265.7 273.5 net of tax Income (loss) from discontinued 1.7 (14.9) (2.3) (12.6) operations, net of tax Net income 154.7 125.9 263.4 260.9 Preferred dividend requirements of 4.0 3.9 11.9 14.3 subsidiaries Net income attributable to Alliant $150.7 $122.0 $251.5 $246.6 Energy common shareowners ALLIANT ENERGY CORPORATION CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) Sep. 30, 2012 Dec. 31, 2011 (in millions) ASSETS: Property, plant and equipment: Utility plant in service, net of accumulated $6,365.8 $6,322.4 depreciation Utility construction work in progress 481.5 257.2 Other property, plant and equipment, net of 537.3 453.7 accumulated depreciation Current assets: Cash and cash equivalents 41.1 11.4 Other current assets 987.5 859.2 Investments 314.1 300.7 Other assets 1,523.6 1,483.3 Total assets $10,250.9 $9,687.9 CAPITALIZATION AND LIABILITIES: Capitalization: Alliant Energy Corporation common equity $3,116.0 $3,013.0 Cumulative preferred stock of subsidiaries, net 205.1 205.1 Noncontrolling interest 1.7 1.8 Long-term debt, net (excluding current portion) 2,828.1 2,703.1 Total capitalization 6,150.9 5,923.0 Current liabilities: Current maturities of long-term debt 1.4 1.4 Commercial paper 70.4 102.8 Other current liabilities 873.7 751.0 Other long-term liabilities and deferred credits 3,154.5 2,909.7 Total capitalization and liabilities $10,250.9 $9,687.9 ALLIANT ENERGY CORPORATION CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) Nine Months Ended Sep. 30, 2012 2011 (in millions) Cash flows from operating activities $600.3 $612.7 Cash flows used for investing activities: Construction and acquisition expenditures: Utility business (412.7) (480.2) Alliant Energy Corporate Services, Inc. and (106.3) (46.1) non-regulated businesses Other 1.3 19.9 Net cash flows used for investing activities (517.7) (506.4) Cash flows used for financing activities: Common stock dividends (149.6) (141.1) Net change in commercial paper 17.6 (25.3) Proceeds from issuance of long-term debt 75.0 0.4 Payments to redeem preferred stock — (40.0) Other 4.1 (13.9) Net cash flows used for financing activities (52.9) (219.9) Net increase (decrease) in cash and cash 29.7 (113.6) equivalents Cash and cash equivalents at beginning of period 11.4 159.3 Cash and cash equivalents at end of period $41.1 $45.7 KEY FINANCIAL STATISTICS Sep. 30, 2012 Sep. 30, 2011 Common shares outstanding (000s) 110,987 110,982 Book value per share $28.08 $27.05 Quarterly common dividend rate per share $0.45 $0.425 KEY OPERATING STATISTICS Three Months Ended Nine Months Ended Sep. 30, Sep. 30, 2012 2011 2012 2011 Utility electric sales (000s of MWh) Residential 2,290 2,243 5,887 5,948 Commercial 1,762 1,705 4,811 4,726 Industrial 3,020 3,021 8,699 8,628 Retail subtotal 7,072 6,969 19,397 19,302 Sales for resale: Wholesale 987 918 2,522 2,573 Bulk power and other 371 338 818 1,480 Other 37 37 111 112 Total 8,467 8,262 22,848 23,467 Utility retail electric customers (at Sep. 30) Residential 843,672 841,772 Commercial 137,485 136,528 Industrial 2,847 2,898 Total 984,004 981,198 Utility gas sold and transported (000s of Dth) Residential 1,542 1,541 14,830 19,234 Commercial 1,797 1,788 11,183 13,534 Industrial 618 735 2,033 2,866 Retail subtotal 3,957 4,064 28,046 35,634 Transportation / other 16,295 13,396 43,303 39,500 Total 20,252 17,460 71,349 75,134 Utility retail gas customers (at Sep. 30) Residential 366,543 364,984 Commercial 45,263 45,197 Industrial 455 544 Total 412,261 410,725 Margin increases (decreases) from net impacts of weather (in millions) - Three Months Ended Nine Months Ended Sep. 30, Sep. 30, 2012 2011 2012 2011 Electric margins $36 $29 $37 $35 Gas margins 1 1 (11) 5 Total weather impact on margins $37 $30 $26 $40 Three Months Ended Sep. 30, Nine Months Ended Sep. 30, 2012 2011 Normal ^(a) 2012 2011 Normal ^(a) Cooling degree days (CDDs) ^(a) Cedar Rapids, Iowa 699 654 507 1,044 867 729 (IPL) Madison, Wisconsin 731 612 442 1,067 804 618 (WPL) Heating degree days (HDDs) ^(a) Cedar Rapids, Iowa 218 204 146 3,420 4,573 4,271 (IPL) Madison, Wisconsin 212 216 183 3,581 4,804 4,530 (WPL) HDDs and CDDs are calculated using a simple average of the high and low ^(a) temperatures each day compared to a 65 degree base. Normal degree days are calculated using a rolling 20-year average of historical HDDs and CDDs. (Logo: http://photos.prnewswire.com/prnh/20020405/LNTLOGO) SOURCE Alliant Energy Corporation Website: http://www.alliantenergy.com Contact: Media, Scott Reigstad, +1-608-458-3145, or Investor Relations, Susan Gille, +1-608-458-3956
Alliant Energy Announces Third Quarter 2012 Results, 2013 Earnings Guidance and Increased Annual Common Stock Dividend Target
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