McNary Dam & Lake Wallula

March 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	19053	794	120	167.70	167.20	153.30	10.30	339.49	339.52	267.37	72.15
2	18967	790	120	164.70	165.90	152.10	10.30	339.45	339.53	267.19	72.34
3	19060	794	120	163.10	165.40	153.30	10.10	339.33	339.32	267.16	72.16
4				158.70	159.00	153.00	4.20	339.28	339.31	267.17	72.14
5				148.00	155.20	153.50	0.00	338.89	339.07	267.08	71.99
6				154.80	157.20	153.70	1.80	338.88	338.73	266.81	71.92
7				177.20	162.40	152.30	8.40	339.55	339.39	266.93	72.46
8				182.40	185.80	153.50	30.60	339.30	339.57	267.60	71.97
9				162.50	171.70	154.60	15.40	338.90	338.98	267.39	71.59
10								338.47
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TOT	57080		360
AVG	19027	793	120	164.34	165.53	153.26	10.12	339.15	339.27	267.19	72.08

MAX	19060			182.40	185.80	154.60	30.60	339.55	339.57	267.60	72.46
MIN	18967			148.00	155.20	152.10	0.00	338.47	338.73	266.81	71.59