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				135.30	120.60	119.20	0.00	568.40	568.29	490.76	77.53
8				115.80	111.90	110.50	0.00	568.94	568.64	490.14	78.50
9				131.70	131.50	130.10	0.00	568.97	569.84	491.85	77.99
10				151.20	141.90	140.50	0.00	570.25	569.10	492.39	76.71
11				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
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TOT	109064		147
AVG	18177	757	24	133.61	134.52	132.93	0.20	568.85	569.02	491.82	77.20

MAX	19728			151.20	147.90	146.40	1.40	571.23	570.41	492.82	78.54
MIN	17207			115.80	111.90	110.50	0.00	566.35	566.37	490.14	74.83