McNary Dam & Lake Wallula

July 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	9627	401	120	183.30	183.60	75.10	103.80	339.01	338.75	265.76	72.99
2	10306	429	120	188.20	190.10	80.10	105.20	338.92	339.05	265.73	73.32
3				179.20	172.50	60.40	107.40	339.26	339.32	265.23	74.09
4				162.50	163.90	61.00	98.20	339.20	339.17	265.05	74.12
5				171.40	167.80	69.80	93.30	339.35	339.42	265.27	74.15
6				170.40	174.90	74.50	95.70	339.13	339.32	265.52	73.80
7				167.40	161.90	56.20	101.00	339.41	339.39	265.22	74.17
8				136.90	133.70	50.60	78.40	339.49	339.32	264.71	74.61
9				127.00	139.10	59.00	75.50	338.84	339.29	264.70	74.59
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TOT	19934		240
AVG	9967	415	120	165.14	165.28	65.19	95.39	339.18	339.23	265.24	73.98

MAX	10306			188.20	190.10	80.10	107.40	339.49	339.42	265.76	74.61
MIN	9627			127.00	133.70	50.60	75.50	338.84	338.75	264.70	72.99