Lower Monumental Dam & Lake

September 2026

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	20.40	21.10	16.40	3.90	538.52	538.37	438.05	100.32
2	17.60	17.50	12.80	3.90	538.57	538.27	438.08	100.19
3	21.70	21.80	19.60	1.40	538.55	538.62	438.53	100.09
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TOT
AVG	19.90	20.13	16.27	3.07	538.55	538.42	438.22	100.20

MAX	21.70	21.80	19.60	3.90	538.57	538.62	438.53	100.32
MIN	17.60	17.50	12.80	1.40	538.52	538.27	438.05	100.09