John Day & Lake Umatilla

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	130.90	118.00	116.90	0.00	264.62	264.33	159.91	104.42
2	128.50	120.70	119.60	0.00	264.92	264.66	159.62	105.04
3	127.90	122.70	121.30	0.00	265.12	265.05	159.53	105.52
4	124.70	130.20	129.00	0.00	264.82	264.89	160.60	104.29
5	112.40	135.60	134.60	0.00	264.02	264.56	160.91	103.65
6	152.90	142.80	141.70	0.00	264.39	264.20	160.89	103.31
7	132.90	140.40	139.30	0.00	264.12	264.09	160.85	103.24
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TOT
AVG	130.03	130.06	128.91	0.00	264.57	264.54	160.33	104.21

MAX	152.90	142.80	141.70	0.00	265.12	265.05	160.91	105.52
MIN	112.40	118.00	116.90	0.00	264.02	264.09	159.53	103.24