John Day & Lake Umatilla

December 2025

Day of Month	Total Generation MWh	Average Generation MW	Station Use MWh	Inflow kcfs	Total Outflow kcfs	Generation Flow kcfs	Spill kcfs	Midnight Reservoir Elevation	Average Forebay Elevation	Average Tailwater Elevation	Average Head feet
1	21871	911	46	130.90	118.00	116.90	0.00	264.62	264.33	159.91	104.42
2	22488	937	48	128.50	120.70	119.60	0.00	264.92	264.66	159.62	105.04
3	22928	955	47	127.90	122.70	121.30	0.00	265.12	265.05	159.53	105.52
4	24099	1004	46	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
8				139.50	134.30	133.10	0.00	264.32	264.05	160.83	103.22
9				128.60	128.60	127.60	0.00	264.32	264.23	160.50	103.73
10				158.70	148.30	147.10	0.00	264.72	264.48	161.17	103.31
11				156.60	151.50	150.40	0.00	264.92	264.69	161.15	103.54
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TOT	91387		187
AVG	22847	952	47	135.78	133.92	132.78	0.00	264.57	264.48	160.54	103.93

MAX	24099			158.70	151.50	150.40	0.00	265.12	265.05	161.17	105.52
MIN	21871			112.40	118.00	116.90	0.00	264.02	264.05	159.53	103.22