McNary Dam & Lake Wallula

September 2025

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	14176	591	96	111.00	116.40	109.80	1.90	338.84	339.21	265.55	73.66
2	13408	559	96	118.20	111.60	105.10	1.80	339.23	339.24	266.29	72.95
3	11355	473	96	89.50	95.00	88.50	1.80	338.94	339.29	266.30	72.99
4	10082	420	96	82.30	84.90	78.40	1.80	338.78	339.17	266.14	73.03
5	10349	431	96	97.00	86.40	79.80	1.80	339.37	339.30	266.05	73.25
6	8486	354	96	64.20	71.70	65.20	1.80	338.99	339.21	265.72	73.49
7	7718	322	96	60.40	65.90	59.50	1.70	338.68	338.81	265.59	73.22
8				61.00	64.00	57.60	1.60	338.48	338.52	265.40	73.12
9				76.80	64.20	57.90	1.60	339.15	338.69	265.32	73.37
10				68.70	68.90	62.40	1.80	339.11	339.24	265.37	73.87
11				74.70	74.50	68.10	1.70	339.16	339.28	265.62	73.66
12				75.30	75.60	69.20	1.80	339.11	339.38	265.57	73.81
13				73.90	76.60	70.10	1.80	339.01	339.30	265.60	73.70
14				66.80	67.00	60.60	1.70	338.99	338.96	265.60	73.36
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TOT	75574		672
AVG	10796	450	96	79.99	80.19	73.73	1.76	338.99	339.11	265.72	73.39

MAX	14176			118.20	116.40	109.80	1.90	339.37	339.38	266.30	73.87
MIN	7718			60.40	64.00	57.60	1.60	338.48	338.52	265.32	72.95