CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Electric plant:
In service	$ 8,596,148	$ 8,345,241
Less: Accumulated provision for depreciation	(3,925,838)	(3,762,690)
Total in service	4,670,310	4,582,551
Nuclear fuel, at amortized cost	373,145	369,529
Construction work in progress	2,868,669	2,374,392
Total electric plant	7,912,124	7,326,472
Investments and funds:
Nuclear decommissioning trust fund	363,829	366,004
Investment in associated companies	72,010	67,368
Long-term investments	86,771	85,728
Restricted cash and investments	134,690	118,390
Other	19,097	17,397
Total investments and funds	676,397	654,887
Current assets:
Cash and cash equivalents	213,038	237,391
Restricted short-term investments	253,204	247,057
Receivables	130,464	130,366
Inventories, at average cost	299,252	270,849
Prepayments and other current assets	16,913	12,667
Total current assets	912,871	898,330
Deferred charges and other assets:
Regulatory assets	530,254	484,049
Prepayments to Georgia Power Company	17,801	73,725
Other	10,336	11,357
Total deferred charges	558,391	569,131
Total assets	10,059,783	9,448,820
Capitalization:
Patronage capital and membership fees	809,465	761,124
Accumulated other comprehensive margin	58	468
Total patronage capital and membership fees and accumulated other comprehensive margin	809,523	761,592
Long-term debt	7,291,154	7,015,577
Obligations under capital leases	96,501	100,456
Other	17,561	16,434
Total capitalization	8,214,739	7,894,059
Current liabilities:
Long-term debt and capital leases due within one year	189,840	160,754
Short-term borrowings	261,478	234,369
Accounts payable	157,432	98,337
Accrued interest	58,830	58,841
Members power bill prepayments, current	174,743	166,013
Other current liabilities	86,746	70,748
Total current liabilities	929,069	789,062
Deferred credits and other liabilities:
Asset retirement obligations	602,230	432,260
Member power bill prepayments, non-current	44,205	31,941
Contract retainage	66,515	55,015
Power sale agreement, being amortized		12,669
Regulatory liabilities	166,967	194,073
Other	36,058	39,741
Total deferred credits and other liabilities	915,975	765,699
Total equity and liabilities	$ 10,059,783	$ 9,448,820
Commitments and Contingencies (Notes 1, 7, 10, 11, 12 and 13)