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	7873	328	120	179.20	172.50	60.40	107.40	339.26	339.32	265.23	74.09
4	7931	330	120	162.50	163.90	61.00	98.20	339.20	339.17	265.05	74.12
5	9090	379	120	171.40	167.80	69.80	93.30	339.35	339.42	265.27	74.15
6	9654	402	120	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
10				141.50	143.40	59.80	78.90	338.75	338.73	264.68	74.05
11				120.40	138.30	53.70	79.90	337.74	338.31	264.60	73.71
12				133.70	121.80	52.10	65.00	338.41	338.12	264.18	73.94
13				146.00	132.20	58.30	69.20	339.16	338.80	264.36	74.44
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TOT	54482		720
AVG	9080	378	120	155.99	155.63	62.35	88.58	338.97	339.00	265.00	74.00

MAX	10306			188.20	190.10	80.10	107.40	339.49	339.42	265.76	74.61
MIN	7873			120.40	121.80	50.60	65.00	337.74	338.12	264.18	72.99