McNary Dam & Lake Wallula

August 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	7102	296	120	138.20	128.50	54.40	69.40	339.12	339.01	264.78	74.23
2	6794	283	120	124.80	128.90	51.90	72.30	338.91	339.07	264.67	74.40
3	6829	285	120	100.10	110.40	52.30	53.40	338.35	338.66	264.45	74.21
4	7090	295	120	115.50	115.10	54.40	56.10	338.35	338.39	264.29	74.10
5	7269	303	120	122.20	125.80	55.90	65.20	338.18	338.42	264.37	74.05
6				123.60	128.50	52.00	71.80	337.92	338.13	264.35	73.78
7				130.90	121.70	52.10	65.00	338.43	338.20	264.21	73.99
8				139.80	125.50	51.40	69.40	339.15	338.98	264.25	74.73
9				102.70	117.00	51.80	60.40	338.42	338.82	264.09	74.73
10				101.40	111.30	51.60	55.00	337.89	338.16	263.86	74.30
11				116.50	118.60	51.20	62.70	337.76	338.00	263.96	74.04
12				110.70	113.80	52.10	57.00	337.58	337.63	263.94	73.69
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TOT	35084		600
AVG	7017	292	120	118.87	120.42	52.59	63.14	338.34	338.46	264.27	74.19

MAX	7269			139.80	128.90	55.90	72.30	339.15	339.07	264.78	74.73
MIN	6794			100.10	110.40	51.20	53.40	337.58	337.63	263.86	73.69