This document provides information about Otter Tail Power Company, including its mission to deliver electricity reliably and responsibly while benefiting customers, shareholders, and employees. It notes that Otter Tail has over 100 years of service, operates across 50,000 square miles including North Dakota, and generates power from coal, gas, oil and wind sources. It also discusses opportunities for energy development and transmission in North Dakota as well as job creation from electric sector retirements and projects like CapX2020.

1. 1 2011 The State of Energy Summit

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3. Our mission To produce and deliver electricity as reliably, economically, and environmentally responsibly as possible to the balanced benefit of customers, shareholders, and employees and to improve the quality of life in the areas in which we do business. 3

4. About us More than 100 years of service Serve 50,000 square-mile area 124,250 customers; 57,000 in North Dakota 423 communities; 224 in North Dakota(average population = 422) Average residential customer uses about 12,950 kwh yearly 4

5. Headquartered in Fergus Falls, MN, with North Dakota customer service centers in Devils Lake, Garrison, Jamestown, Oakes, Rugby, and Wahpeton 790 employees; 196 in North Dakota Generation Operate three coal-fired power plants, total about 1075 MW(Big Stone and Coyote co-owned with MDU, NEW, MPC) Own 120 MW of gas and oil peaking plants Own 138 MW of wind energy 5

6. Wind energy Langdon Wind Energy Center January 2008 – 40.5 MW owned 19.5 MW PPA Ashtabula Wind Energy Center November 2008 – 48 MW Luverne Wind Farm September 2009 – 49.5 MW Otter Tail Power Company wind:ownership = 138 MW purchases = 45 MW 6

7. Balanced resource mix 7 2010 resource mix

8. On for North Dakota 8

9. Rates 9

10. On for business Paid $86 million to North Dakota vendors in 2010. Economic development Since 1989 we’ve helped create nearly 19,600 jobs and save nearly 4,200 jobs throughout our service area. In 2010 we helped create 424 jobs and save 10 jobs in North Dakota. 10

11. Otter Tail Corporation 11

12. Job opportunities (electric sector) Energy development Retirement bubble 12

13. To develop energy… North Dakota has: Resources. Technology. State regulatory/permitting framework. Adequate water and labor. North Dakota is limited by: Energy transportation Federal regulatory uncertainty 13

14. Energy transportation Increase North Dakota usage. Increase export. Additional oil and gas pipelines. Access to, and favorable prices for, rail Additional aluminum strand (coming with CapX2020 transmission projects) 14

15. Transmission Improves reliability. Expands generation development. 15

16. CapX2020 Impacts to North Dakota: Total value added (payroll): $13,674,976 Total sales (steel, concrete, fuel, equipment, etc.): $31,884,800 Additional jobs: 120 in each year of construction 2014, 2015 Indirect business tax impact : $302,208 16

17. Electric development job creation 17

18. Retirement bubble 4000+ MW coal-fired generation, plants are similar age. Estimate 800 plant positions. Up to 40% retire in the next 10 years. 18