CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Electric plant:
In service	$ 8,786,839	$ 8,596,148
Less: Accumulated provision for depreciation	(4,115,339)	(3,925,838)
Net in service	4,671,500	4,670,310
Nuclear fuel, at amortized cost	377,653	373,145
Construction work in progress	3,228,214	2,868,669
Total electric plant	8,277,367	7,912,124
Investments and funds:
Nuclear decommissioning trust fund	386,029	363,829
Investment in associated companies	72,783	72,010
Long-term investments	99,874	86,771
Restricted cash and investments	221,122	134,690
Other	20,730	19,097
Total investments and funds	800,538	676,397
Current assets:
Cash and cash equivalents	366,290	213,038
Restricted short-term investments	247,006	253,204
Receivables	155,042	130,464
Inventories, at average cost	259,831	299,252
Prepayments and other current assets	32,919	16,913
Total current assets	1,061,088	912,871
Deferred charges and other assets:
Regulatory assets	545,387	530,254
Prepayments to Georgia Power Company	3,948	17,801
Other	12,785	10,336
Total deferred charges	562,120	558,391
Total assets	10,701,113	10,059,783
Capitalization:
Patronage capital and membership fees	859,810	809,465
Accumulated other comprehensive (deficit) margin	(370)	58
Total patronage capital and membership fees and accumulated other comprehensive margin	859,440	809,523
Long-term debt	7,892,836	7,291,154
Obligations under capital leases	92,096	96,501
Other	18,765	17,561
Total capitalization	8,863,137	8,214,739
Current liabilities:
Long-term debt and capital leases due within one year	316,861	189,840
Short-term borrowings	102,168	261,478
Accounts payable	73,801	157,432
Accrued interest	93,634	58,830
Member power bill prepayments, current	176,988	174,743
Other current liabilities	59,979	86,746
Total current liabilities	823,431	929,069
Deferred credits and other liabilities:
Asset retirement obligations	698,051	602,230
Member power bill prepayments, non-current	48,115	44,205
Contract retainage	40,008	66,515
Regulatory liabilities	197,748	166,967
Other	30,623	36,058
Total deferred credits and other liabilities	1,014,545	915,975
Total equity and liabilities	10,701,113	10,059,783
Commitments and Contingencies (Notes 1, 7, 10, 11, 12 and 13)