1. Black Hills Corporation Transmission Plan August 18, 2016 CCPG Meeting Black Hills Power Cheyenne Light, Fuel & Power Black Hills Colorado Electric

2. Project Estimated In-Service Need/Purpose Rapid City DC Tie RAS Reconfiguration2017 Incorporate Transmission Additions, Reliability Needs Teckla-Osage-Lange 230 kV Line (65 mi) Teckla-Osage-Lange 230 kV Line (82 mi) Q1 2017 Aug. 31, 2016 Reliability, Transmission Service Request Second Yellowcreek 230/69 kV Transformer2021Reliability South Rapid City-Westhill 230 kV RebuildQ4 2018Age of Infrastructure Wyodak Area 230/69 kV TransformerQ4 2021Reliability Osage Area 230/69 kV TransformerTBDReliability Black Hills Power

3. Black Hills Power Transmission Plan

4. Cheyenne Light, Fuel & Power Project Estimated In-Service Need/Purpose Microsoft 115 kV Substation and Transmission In-ServiceLoad Service Second South Cheyenne 230/115 kV Transformer In-ServiceLoad Service Second North Range-South Cheyenne 115 kV Circuit (~13 miles via Swan Ranch Tap) In-ServiceReliability, Load Service King Ranch 115 kV Substation and Transmission to North Range 115kV Line Q3 2017Load Service Swan Ranch 115 kV SubstationQ4 2020Load Service Cheyenne Prairie – Archer 115 kV Circuit Rebuild (~2 miles) 2019Reliability, Load Service Cheyenne Prairie – East Business Park 115 kV Circuit Rebuild (~0.5 mile) 2019Reliability, Load Service Cheyenne Prairie – South Cheyenne 115 kV Double Circuit (~10 miles) Q4 2022 or Q1 2023Proposed

5. Cheyenne Light, Fuel & Power Transmission Plan

6. Black Hills Colorado Electric Project Estimated In-Service Need/Purpose West Station-Desert Cove 115 kV Line RebuildIn-ServiceReliability Rattlesnake Butte 115 kV Substation TerminalAug. 31, 2016Generation Boone-Nyberg 115 kV ProjectOctober 2016Reliability Pueblo Plant-Reader 115 kV Substation TerminalQ4-2016Reliability Fountain Lake (Overton) 115/69 kV SubstationQ1-2017Load Service Baculite Mesa-Fountain Lake (Overton) 115 kVQ4-2021Reliability La Junta 115 kV Area UpgradesQ1-2018Reliability Portland 115/69 kV Transformer ReplacementQ4-2018Load Service Arequa Gulch 115 kV Capacitor BankQ4-2018Load Service West Station 115 kV Substation UpgradesQ4-2018Reliability West Station-West Cañon 115 kV Line (Proposed)Q4-2019Reliability North Cañon Substation 115/69 kV (Proposed)Q4-2019Load Service

7. Black Hills Colorado Electric Transmission Plan

8. West Station-West Canon Project Diagram

9. BHC Peak Demand

10. Contact Information Wes Wingen wes.wingen@blackhillscorp.com (605)-721-2268 Charles Shue Charles.Shue@blackhillscorp.com (605)-721-1763