Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Electric plant:
In service	$ 8,857,293	$ 8,786,839
Less: Accumulated provision for depreciation	(4,260,047)	(4,115,339)
Net in service	4,597,246	4,671,500
Nuclear fuel, at amortized cost	360,529	377,653
Construction work in progress	3,824,068	3,228,214
Total electric plant	8,781,843	8,277,367
Investments and funds:
Nuclear decommissioning trust fund	427,786	386,029
Investment in associated companies	74,187	72,783
Long-term investments	125,518	99,874
Restricted investments	265,180	221,122
Other	21,689	20,730
Total investments and funds	914,360	800,538
Current assets:
Cash and cash equivalents	342,064	366,290
Restricted short-term investments	246,432	247,006
Receivables	180,250	155,042
Inventories, at average cost	263,226	259,831
Prepayments and other current assets	20,438	32,919
Total current assets	1,052,410	1,061,088
Deferred charges:
Regulatory assets	572,237	545,387
Other	28,639	16,733
Total deferred charges	600,876	562,120
Total assets	11,349,489	10,701,113
Capitalization:
Patronage capital and membership fees	923,495	859,810
Accumulated other comprehensive margin	(352)	(370)
Total patronage capital and membership fees and accumulated other comprehensive margin	923,143	859,440
Long-term debt	7,991,307	7,892,836
Obligation under capital lease	89,710	92,096
Other	19,725	18,765
Total capitalization	9,023,885	8,863,137
Current liabilities:
Long-term debt and capital lease due within one year	154,817	316,861
Short-term borrowings	631,949	102,168
Accounts payable	161,168	73,801
Accrued interest	84,287	93,634
Member power bill prepayments, current	43,836	176,988
Other current liabilities	54,621	59,979
Total current liabilities	1,130,678	823,431
Deferred credits and other liabilities:
Asset retirement obligations	726,074	698,051
Member power bill prepayments, non-current	202,202	48,115
Contract retainage	0	40,008
Regulatory liabilities	236,445	197,748
Other	30,205	30,623
Total deferred credits and other liabilities	1,194,926	1,014,545
Total equity and liabilities	$ 11,349,489	$ 10,701,113