McNary Dam & Lake Wallula

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	22640	943	120	225.10	224.10	186.80	34.60	339.40	339.25	268.56	70.69
2				201.60	206.60	179.20	24.70	339.13	339.39	268.36	71.03
3				193.80	202.40	184.90	14.80	338.72	338.80	268.26	70.54
4				201.00	197.50	184.70	10.10	338.91	338.76	268.24	70.52
5				191.30	196.70	184.50	9.50	338.53	338.79	268.20	70.59
6				181.60	184.80	172.90	9.20	338.40	338.44	267.75	70.69
7				167.30	173.80	161.90	9.10	338.07	338.40	267.42	70.98
8				167.80	174.10	162.80	8.60	337.64	337.87	267.22	70.65
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TOT	22640		120
AVG	22640	943	120	191.19	195.00	177.21	15.07	338.60	338.71	268.00	70.71

MAX	22640			225.10	224.10	186.80	34.60	339.40	339.39	268.56	71.03
MIN	22640			167.30	173.80	161.90	8.60	337.64	337.87	267.22	70.52