McNary Dam & Lake Wallula

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	19030	793	24	160.30	153.60	150.80	0.00	339.49	339.30	266.26	73.04
2	19038	793	24	151.30	152.60	149.80	0.00	339.36	339.39	265.97	73.42
3	18984	791	24	149.10	151.50	148.70	0.00	339.15	339.42	265.78	73.64
4	19058	794	24	167.10	158.90	149.10	7.00	339.79	339.55	265.77	73.78
5	19071	795	24	167.30	168.00	150.00	15.30	339.61	339.56	266.12	73.44
6	19071	795	24	155.70	163.10	150.00	10.30	339.20	339.54	266.10	73.44
7	19064	794	24	147.10	153.40	150.60	0.00	338.94	339.10	265.94	73.16
8	19047	794	24	139.80	154.20	151.40	0.00	338.04	338.70	265.89	72.81
9	18530	772	24	137.90	152.80	150.00	0.00	337.39	337.61	266.05	71.56
10	17667	736	24	174.10	144.90	142.10	0.00	338.93	338.00	265.78	72.22
11	18005	750	24	166.90	154.90	141.10	11.00	339.50	339.47	265.83	73.64
12				176.50	181.10	152.10	26.30	339.28	339.40	266.80	72.60
13				161.80	158.60	151.70	4.10	339.53	339.51	266.73	72.78
14				157.10	153.80	151.00	0.00	339.58	339.63	266.58	73.05
15				159.60	164.20	151.80	9.60	339.35	339.63	266.84	72.79
16				161.10	158.90	151.30	4.80	339.56	339.53	266.59	72.94
17				181.50	181.20	151.40	27.10	339.66	339.63	266.75	72.88
18				169.30	170.60	152.70	15.10	339.54	339.34	266.97	72.37
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TOT	206564		264
AVG	18779	782	24	160.19	159.79	149.76	7.26	339.22	339.24	266.26	72.98

MAX	19071			181.50	181.20	152.70	27.10	339.79	339.63	266.97	73.78
MIN	17667			137.90	144.90	141.10	0.00	337.39	337.61	265.77	71.56