Second Quarter 2015 Highlights Rawhide Energy Station Financial Summary Platte River reported operating income of $7.2 million for the first six months, compared with $10.5 million reported during the same period in 2014. Operating revenues decreased $0.8 million from the same period last year mainly due to a $2.7 million decrease in surplus sales as a result of a soft market. Offsetting some of the decrease was a $1.9 million increase in municipal sales. The increase was primarily the result of a 2.5% increase in wholesale rates. Total operating expenses were up $2.5 million. Operation and maintenance expenses were up $3.9 million due to demand side management incentives, strategic planning initiatives, and purchased power and transmission expenses for new wind resources. Depreciation decreased $1.4 million as many Rawhide and Craig assets reached the end of their depreciable life in 2014. Income before contributions was $3.2 million, down from the $6.4 million reported during the same period last year. Total debt service coverage for the first six months was 1.37 times. Power Production During the first half of 2015, Rawhide Unit 1 reported a net plant capacity factor of 91%, down slightly from the 92% reported for the same period last year. In 2015, the unit was held back to build coal inventory levels and in response to the soft surplus sales market. Craig Units 1 and 2 reported a combined plant capacity factor of 75%, down from the 85% reported last year. The units experienced maintenance issues and were also held back due to the soft surplus sales market. Other generation included 141,340 MWh of wind, 299,627 MWh of hydro-power, and Platte River’s peaking units produced 12,775 MWh. Operating Statistics Platte River supplied 1,537,621 MWh to its four municipal owners, up 0.8% from the first six months last year. The total monthly municipal billing demand was down 2.4% from the same period last year. Municipal Peak Demand (kW) Municipal Energy Sales (MWh) Other Energy Sales (MWh) 6 Months Ended June 30 2014 2015 545,252 596,049 1,537,621 476,235 1,525,403 482,948 12 Months Ended June 30 2014 2015 648,709 625,517 3,166,494 763,591 3,174,630 792,066 Page 1 of 2 CONDENSED STATEMENTS OF NET POSITION Unaudited (In Thousands) June 30 2015 ASSETS Electric utility plant, net Special funds and investments Current assets Non-current assets Total assets $ DEFERRED OUTFLOWS OF RESOURCES LIABILITIES Non-current liabilities Current liabilities Total liabilities DEFERRED INFLOWS OF RESOURCES NET POSITION $ 2014 568,047 82,044 89,486 4,001 743,578 $ 575,448 76,914 88,214 4,847 745,423 1,470 2,490 199,865 34,292 234,157 220,581 36,844 257,425 12,924 5,807 497,967 $ 484,681 CONDENSED STATEMENTS OF REVENUES, EXPENSES AND CHANGES IN NET POSITION Unaudited (In Thousands) 6 Months Ended June 30 2015 2014 OPERATING REVENUES: Sales to municipalities Sales for resale and other Total operating revenues $ OPERATING EXPENSES: Operations and maintenance Depreciation Total operating expenses OPERATING INCOME NONOPERATING REVENUES AND EXPENSES: Interest and other income Interest expense, net Net increase/(decrease) in fair value of investments Total nonoperating revenues and expenses INCOME BEFORE CONTRIBUTIONS Contribution of assets to municipalities CHANGE IN NET POSITION 83,011 15,178 98,189 $ $ 171,693 27,329 199,022 $ 169,403 30,017 199,420 77,558 13,457 91,015 73,714 14,851 88,565 150,455 26,981 177,436 145,689 31,492 177,181 7,174 10,470 21,586 22,239 826 (4,936) 150 (3,960) 1,166 (5,332) 75 (4,091) 1,670 (9,928) 113 (8,145) 545 (10,714) 182 (9,987) 3,214 6,379 13,441 12,252 (155) (155) $ 81,091 17,944 99,035 12 Months Ended June 30 2015 2014 3,059 $ 6,224 (155) (155) $ 13,286 $ 12,097 Page 2 of 2