Page 1 Page 2 Page 3 Page 4 Page 5 Page 6 Page 7 Page 8 Page 9 Page 10 Page 11 Page 12 Page 13 Page 14 Page 15 Page 16 Page 17 Page 18 Page 19 Page 20 Page 21 Page 22 Page 23 Page 24 Page 25 Page 26 Page 27 Page 28 Page 29 Page 30 Page 31 Page 32 Page 33 Page 34 Page 35 Page 36 Page 37 Page 38 Page 39 Page 40 Page 41 Page 42 Page 43 Page 44 Page 45 Page 46 Page 47 Page 48 Page 49 Page 50 Page 51 Page 52 Page 53 Page 54 Page 55 Page 56 Page 57 Page 58 Page 59 Page 60 Page 61 Page 62 Page 63 Page 64 Page 65 Page 66 Page 67 Page 68 Page 69 Page 70 Page 71 Page 72 Page 73 Page 74 Page 75 Page 76 Page 77 Page 78 Page 79 Page 80 Page 81 Page 82 Page 83 Page 84 Page 85 Page 86 Page 87 Page 88 Page 89 Page 90Seattle City Light 2015 Annual Report 75 THE CITY OF SEATTLE—CITY LIGHT DEPARTMENT OTHER INFORMATION (UNAUDITED) - 75 - POWER COSTS AND STATISTICS Year ending December 31 2015 2014 2013 2012 2011 ($ in millions) POWER COSTS Hydroelectric generation(a)(c) 50.1 $ 49.9 $ 54.0 $ 45.7 $ 43.3 $ Long-term purchased power(b) 213.6 214.3 203.1 204.1 206.9 Wholesale power purchases(c)(e) 26.8 14.9 19.8 11.8 11.5 Fair valuation & other power purchases(b)(e) 11.8 17.7 14.1 7.8 9.0 Owned transmission(a) 17.2 15.3 15.1 14.5 12.4 Wheeling expenses 42.0 42.1 37.4 36.5 38.9 Other power expenses 12.9 13.2 12.2 10.3 10.2 Total power costs 374.4 367.4 355.7 330.7 332.2 Less short-term wholesale power sales(c) (61.2) (96.8) (63.0) (70.4) (102.7) Less other power-related revenues (19.9) (25.5) (21.5) (16.8) (37.7) Less fair valuation other power-related(b) (16.9) (25.3) (18.9) (12.5) (17.0) Net power costs 276.4 $ 219.8 $ 252.2 $ 231.0 $ 174.8 $ POWER STATISTICS (MWh) Hydroelectric generation(c) 5,979,884 7,091,368 6,108,908 6,947,088 7,546,905 Long-term purchased power(b) 6,900,647 6,658,689 6,482,960 7,232,362 7,859,766 Wholesale power purchases(c) 1,379,168 900,527 2,072,066 2,592,354 1,696,861 Wholesale power sales(c) (3,548,507) (4,083,391) (3,854,352) (5,625,088) (6,053,258) Other(d) (1,023,970) (655,569) (760,882) (1,064,692) (847,282) Total power available 9,687,222 9,911,624 10,048,700 10,082,024 10,202,992 Less self consumed energy (25,195) (29,717) (30,910) (31,072) (32,752) Less system losses (504,533) (541,323) (511,390) (584,310) (570,008) Total power delivered to retail customers 9,157,494 9,340,584 9,506,400 9,466,642 9,600,232 Net power cost per MWh delivered 30.18 $ 23.53 $ 26.53 $ 24.40 $ 18.21 $ (a) Including depreciation. (b) Long-term purchased power, fair valuation power purchases and fair valuation other power-related include energy exchanged under seasonal and other exchange contracts valued at market in accordance with GASB Statement No. 62, Codification of Accounting and Financial Reporting Guidance Contained in Pre-November 30, 1989 FASB & AICPA Pronouncements. (c) The level of generation (and consequently the amount of power purchased and sold on the wholesale market) can fluctuate widely from year to year depending upon water conditions in the Northwest region. (d) "Other" includes seasonal exchange power delivered and miscellaneous power transactions. (e) Bookout purchases are excluded from wholesale power purchases and are reported on a net basis in wholesale power sales. Note: Certain dollar amounts for 2011 - 2014 have been revised to conform with the 2015 presentation.