Condensed Statements of Revenues and Expenses (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Operating revenues:
Sales to Members	$ 327,776	$ 325,963	$ 597,224	$ 629,791
Sales to non-Members	52,027	147	52,353	392
Total operating revenues	379,803	326,110	649,577	630,183
Operating expenses:
Fuel	161,355	121,459	233,804	223,551
Production	89,866	85,878	179,055	163,261
Depreciation and amortization	49,468	33,605	83,873	67,444
Purchased power	13,600	18,217	25,155	35,625
Accretion	4,565	4,282	9,125	8,566
Deferral of effect on net margin for Hawk Road and Murray Energy facilities	(2,753)	2,900	(11,072)	6,071
Total operating expenses	316,101	266,341	519,940	504,518
Operating margin	63,702	59,769	129,637	125,665
Other income:
Investment income	6,926	7,497	14,320	15,153
Other	1,957	2,901	5,323	6,182
Total other income	8,883	10,398	19,643	21,335
Interest charges:
Interest expense	72,279	65,555	142,945	131,143
Allowance for debt funds used during construction	(17,753)	(8,676)	(32,981)	(18,137)
Amortization of debt discount and expense	5,341	5,888	10,488	11,990
Net interest charges	59,867	62,767	120,452	124,996
Net margin	$ 12,718	$ 7,400	$ 28,828	$ 22,004