Iowa Industrial Energy Group: 2016 Spring Conference Bob Bartlett April 12, 2016 Classification: CONFIDENTIAL

22 And our industry is helping lead the change  Technology advancements  Continued growth in natural gas supply  Increased development and integration of renewables  More customer-owned generation  Regulations and public policy impact The future of energy is changing

3  Installing air quality control systems and modernizing our coal-fired units  Retiring older, smaller fossil- fueled generating units  Increasing highly efficient natural gas-fired generation  Adding wind, solar, and other renewable resources  Continuing to support robust energy efficiency programs Innovation through Responsible Resources

4 Modernization of our Generation System

dataIowa Electric Customers489,000 Electric Distribution Line (miles) 20,400 Gas Customers225,000 Gas Main (Miles)5,100 Owned Generating Capacity (MWs) 2,450 Electric Sales (000s MWh)14,800 Iowa Service Territory  Incorporated in 1925  ~50,000 square miles  80 counties  650 communities  ~1.1 million people Alliant Energy in Iowa 5

 Coal Generation Lansing, Ottumwa, Burlington and Cedar Rapids (Prairie Creek)  Gas Generation Mason City (Emery), Clinton (M.L. Kapp) and Marshalltown (Sutherland)  Renewable Generation Whispering Willows Wind Farm in Franklin County 2015 \ Electric Power Sources Main Iowa Generation Facilities 6

 An approximate 650-megawatt natural gas facility  Scheduled to be in-service by second quarter 2017 Future facility: Marshalltown Generating Station

8  Our focus on customer value emphasizes affordability and exceptional service, both now and in the future  Continuing to develop additional opportunities to interact with customers Our “Customer-Driven” Approach

9  Foundation and corporate giving programs provided more than $6.8 million in 2015  Partnered with hundreds of organizations across Iowa including:  The Nature Conservancy  Governor’s STEM Advisory Council  United Ways  Food Banks  Habitat for Humanity  Junior Achievement  Trees Forever  Employee and retiree volunteer engagement programs  Grants for volunteer efforts  Assistance with the Iowa Employer Volunteer Initiatives with Volunteer Iowa office Alliant Energy Gives Back

Elections…

11 Candidates’ Views on Energy  Clinton/ Sanders oppose Keystone XL Pipeline, support Clean Power Plan, renewable energy subsidies  Republican candidates are generally opposed to Clean Power Plan, and other major EPA rules  Democrat victory: Expect same commitment as Obama to climate change and a strong EPA. Goal of 50% electricity from renewables by 2030  Republican victory: Expect “slowing” of major rules, efforts to open up more federal lands for oil and gas development

12 Election could change balance of power

Congressional Map

Advocacy Priorities  LIHEAP – Low Income Energy Assistance Program  PURPA – Public Utility Regulatory Policies Act  Pipeline Safety  Coal Ash  Clean Power Plan  New business development  Economic development  Other e.g. renewables

15  Iowa Efforts  Iowa DNR stakeholder state plan discussions (currently on-hold)  EPA public comments  Outlook for CPP Litigation  February 9 – Supreme Court stay  June 2-3 – Oral arguments D.C. Circuit Court  Fall 2016 – D.C. Circuit Court decision  Early 2017 – Petition for Supreme Court review  Early 2018 – Supreme Court decision  Our generation strategy provides flexibility in transitioning to cleaner resources and is independent of the Clean Power Plan Clean Power Plan Update

Questions