Consolidated Balance Sheets - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Utility plant:
Electric plant in service	$ 1,205,092,224	$ 1,192,513,869
Construction work in progress	17,952,573	18,455,940
Total utility plant	1,223,044,797	1,210,969,809
Less accumulated depreciation	(515,496,312)	(496,098,131)
Net utility plant	707,548,485	714,871,678
Other property and investments, at cost:
Nonutility property	76,889	76,889
Investments in associated organizations	8,980,410	9,349,311
Special funds	1,466,010	907,836
Restricted cash equivalents	1,028,758	810,559
Investments - other	0	3,061,434
Total other property and investments	11,552,067	14,206,029
Current assets:
Cash and cash equivalents	5,485,631	4,672,935
Special deposits	54,300	75,942
Restricted cash equivalents	687,370	899,723
Marketable securities	11,420,900	7,375,381
Fuel cost under-recovery	4,921,794	0
Accounts receivable, less provisions for doubtful accounts of $555,336 in 2017 and $484,352 in 2016	35,680,680	33,000,919
Materials and supplies	15,291,095	27,889,167
Fuel stock	6,901,994	6,321,676
Prepayments	4,953,170	1,407,026
Other current assets	257,193	294,697
Total current assets	85,654,127	81,937,466
Other non-current assets:
Deferred charges, net	32,764,065	25,140,957
Total other non-current assets	32,764,065	25,140,957
Total assets	837,518,744	836,156,130
Equities and margins:
Memberships	1,719,154	1,691,014
Patronage capital	172,928,887	169,996,436
Other	14,653,253	13,828,075
Total equities and margins	189,301,294	185,515,525
Long-term obligations, excluding current installments:
Bonds payable	421,833,331	405,249,998
Notes payable	37,164,000	40,356,000
Less unamortized debt issuance costs	(2,669,485)	(2,715,745)
Total long-term obligations	456,327,846	442,890,253
Current liabilities:
Current installments of long-term obligations	26,608,667	24,836,667
Commercial paper	50,000,000	68,200,000
Accounts payable	7,420,279	9,618,630
Consumer deposits	5,335,896	5,207,585
Fuel cost over-recovery	0	3,824,722
Accrued interest	5,991,619	5,873,368
Salaries, wages and benefits	7,017,131	7,315,898
Fuel	9,913,781	6,284,338
Other current liabilities	7,079,821	3,234,586
Total current liabilities	119,367,194	134,395,794
Other non-current liabilities:
Deferred compensation	1,229,294	907,836
Other liabilities, non-current	531,630	655,277
Deferred liabilities	1,249,390	1,179,414
Patronage capital payable	8,798,077	12,008,499
Cost of removal obligation / asset retirement obligation	60,714,019	58,603,532
Total other non-current liabilities	72,522,410	73,354,558
Total liabilities, equities and margins	$ 837,518,744	$ 836,156,130