McNary Dam & Lake Wallula

October 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	9016	376	120	66.60	75.30	68.80	1.80	338.96	339.37	265.15	74.22
2	10231	426	120	90.20	85.70	79.30	1.70	339.23	339.08	265.60	73.48
3	9231	385	120	75.50	77.50	71.00	1.80	339.16	339.36	265.69	73.67
4	8265	344	120	70.10	70.10	63.60	1.70	339.13	339.09	265.85	73.24
5	9418	392	120	66.90	79.90	73.40	1.70	338.41	338.89	265.98	72.91
6	9980	416	120	84.90	84.80	78.40	1.70	338.45	338.51	265.80	72.71
7	10366	432	120	74.40	87.80	81.50	1.60	337.73	338.24	265.77	72.47
8	9144	381	120	87.60	78.00	71.90	1.50	338.23	337.76	265.66	72.10
9				99.90	96.70	90.40	1.60	338.40	338.36	266.00	72.36
10				97.00	98.50	92.20	1.60	338.31	338.35	266.20	72.15
11				90.10	79.20	72.80	1.70	338.89	338.84	265.96	72.88
12				80.60	77.00	70.60	1.70	339.10	339.00	265.84	73.16
13				101.20	100.70	94.20	1.80	339.13	339.42	266.17	73.25
14				92.30	97.90	91.40	1.80	338.82	339.08	266.21	72.87
15				86.20	93.50	87.20	1.70	338.42	338.79	266.12	72.67
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TOT	75651		960
AVG	9456	394	120	84.23	85.51	79.11	1.69	338.69	338.81	265.87	72.94

MAX	10366			101.20	100.70	94.20	1.80	339.23	339.42	266.21	74.22
MIN	8265			66.60	70.10	63.60	1.50	337.73	337.76	265.15	72.10