Wanapum Dam & Lake

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	97.50	102.30	100.90	0.00	567.72	568.30	489.96	78.34
2	97.50	99.50	98.10	0.00	567.43	568.13	489.74	78.39
3	98.10	98.50	97.10	0.00	567.38	567.07	489.67	77.40
4	105.60	94.50	93.10	0.00	568.93	567.33	489.29	78.04
5	135.70	130.30	128.90	0.00	569.68	568.93	491.48	77.45
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TOT
AVG	106.88	105.02	103.62	0.00	568.23	567.95	490.03	77.92

MAX	135.70	130.30	128.90	0.00	569.68	568.93	491.48	78.39
MIN	97.50	94.50	93.10	0.00	567.38	567.07	489.29	77.40