Wanapum Dam & Lake

February 2026

Day of Month	Total Generation MWh	Average Generation MW	Station Use MWh	Inflow kcfs	Total Outflow kcfs	Generation Flow kcfs	Spill kcfs	Midnight Reservoir Elevation	Average Forebay Elevation	Average Tailwater Elevation	Average Head feet
1	17513	730	25	116.60	129.30	127.90	0.00	569.03	569.66	491.68	77.98
2	18083	753	24	133.70	131.60	130.20	0.00	569.32	569.70	491.55	78.15
3	18464	769	24	149.10	135.10	132.60	1.20	571.23	570.41	491.87	78.54
4	19728	822	24	130.50	147.90	145.20	1.40	568.82	569.87	492.82	77.05
5	18069	753	26	126.80	137.30	135.90	0.00	567.36	567.57	492.19	75.38
6	17207	717	24	123.90	131.10	129.70	0.00	566.35	566.37	491.54	74.83
7	16462	686	25	135.30	120.60	119.20	0.00	568.40	568.29	490.76	77.53
8	15483	645	25	115.80	111.90	110.50	0.00	568.94	568.64	490.14	78.50
9	18014	751	25	131.70	131.50	130.10	0.00	568.97	569.84	491.85	77.99
10	18975	791	25	151.20	141.90	140.50	0.00	570.25	569.10	492.39	76.71
11	20065	836	24	146.40	147.80	146.40	0.00	570.05	569.95	492.50	77.45
12				126.20	146.30	144.90	0.00	567.26	569.07	492.51	76.56
13				149.70	136.40	135.00	0.00	569.12	568.76	491.84	76.92
14				122.80	137.70	136.30	0.00	567.03	568.37	491.93	76.44
15				129.70	132.10	130.70	0.00	566.70	567.24	491.61	75.63
16				152.50	135.80	134.40	0.00	569.02	567.76	491.88	75.88
17				155.40	158.30	156.90	0.00	568.62	568.67	493.09	75.58
18				143.80	149.00	147.60	0.00	567.89	568.06	492.74	75.32
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TOT	198063		271
AVG	18006	750	25	135.62	136.76	135.22	0.14	568.58	568.74	491.94	76.80

MAX	20065			155.40	158.30	156.90	1.40	571.23	570.41	493.09	78.54
MIN	15483			115.80	111.90	110.50	0.00	566.35	566.37	490.14	74.83