McNary Dam & Lake Wallula

December 2025

Day of Month	Inflow kcfs	Total Outflow kcfs	Generation Flow kcfs	Spill kcfs	Midnight Reservoir Elevation	Average Forebay Elevation	Average Tailwater Elevation	Average Head feet
1	130.50	123.80	119.10	0.00	339.21	339.26	265.24	74.02
2	109.70	125.40	120.70	0.00	338.42	338.89	265.53	73.36
3	114.70	125.40	120.70	0.00	337.80	338.21	265.86	72.35
4	119.80	116.70	112.00	0.00	337.96	337.92	265.61	72.31
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TOT
AVG	118.67	122.83	118.12	0.00	338.35	338.57	265.56	73.01

MAX	130.50	125.40	120.70	0.00	339.21	339.26	265.86	74.02
MIN	109.70	116.70	112.00	0.00	337.80	337.92	265.24	72.31