Lower Monumental 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	24.70	24.40	23.80	0.00	538.94	538.89	439.31	99.58
2	16.90	17.00	16.20	0.00	538.91	538.89	439.09	99.80
3	17.90	17.60	16.90	0.00	539.00	538.95	439.04	99.91
4	24.80	24.00	23.30	0.00	539.22	539.04	439.17	99.87
5	20.70	21.90	21.10	0.00	538.88	538.86	438.97	99.89
6	19.40	19.60	18.90	0.00	538.81	538.93	439.10	99.83
7	19.20	19.30	18.60	0.00	538.80	538.87	439.17	99.70
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TOT
AVG	20.51	20.54	19.83	0.00	538.94	538.92	439.12	99.80

MAX	24.80	24.40	23.80	0.00	539.22	539.04	439.31	99.91
MIN	16.90	17.00	16.20	0.00	538.80	538.86	438.97	99.58