Wanapum Dam & Lake

April 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	18646	777	17	133.80	142.40	135.40	6.10	569.46	570.22	492.33	77.89
2	14029	585	17	120.20	115.50	98.80	15.70	570.11	569.87	490.07	79.80
3	17784	741	18	128.80	135.50	128.50	6.00	569.20	569.70	491.47	78.23
4	16571	690	17	127.20	134.10	122.60	10.50	568.23	568.83	491.04	77.79
5	16020	668	17	125.70	123.40	117.20	4.20	568.56	568.62	490.65	77.97
6	16853	702	17	127.60	125.70	123.70	0.00	568.82	568.57	491.27	77.30
7				105.10	100.90	92.10	6.80	569.40	569.87	489.41	80.46
8				118.80	121.00	105.70	13.30	569.11	570.04	490.65	79.39
9				111.40	122.10	101.30	18.70	567.62	568.29	490.62	77.67
10				134.90	133.50	112.90	18.60	567.82	568.16	491.36	76.80
11				127.10	125.70	105.00	18.70	568.02	568.43	490.77	77.66
12				152.90	145.40	123.90	19.50	569.05	569.61	491.88	77.73
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TOT	99903		103
AVG	16650	694	17	126.13	127.10	113.93	11.51	568.78	569.18	490.96	78.22

MAX	18646			152.90	145.40	135.40	19.50	570.11	570.22	492.33	80.46
MIN	14029			105.10	100.90	92.10	0.00	567.62	568.16	489.41	76.80