John Day & Lake Umatilla

April 2026

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	40526	1689	50	231.70	232.10	221.10	9.80	265.52	265.52	162.87	102.65
2	36634	1526	53	214.40	209.10	198.30	9.80	265.72	265.46	161.88	103.58
3	36952	1540	52	213.80	211.20	200.10	9.80	265.82	265.86	162.37	103.49
4	35992	1500	49	209.10	206.50	195.20	9.80	265.92	265.95	162.57	103.38
5	36790	1533	48	208.60	211.20	200.00	9.80	265.82	265.91	162.84	103.07
6	35712	1488	46	193.70	204.10	193.10	9.80	265.42	265.67	162.09	103.58
7				186.40	194.20	183.50	9.70	265.12	265.08	161.46	103.62
8				181.50	176.30	165.20	9.70	265.32	265.25	160.94	104.31
9				178.20	178.20	166.60	10.50	265.32	265.48	161.43	104.05
10				184.20	184.20	64.90	118.00	265.32	265.40	160.35	105.05
11				199.30	199.30	60.20	137.70	265.32	265.28	160.95	104.33
12				205.70	216.20	60.60	154.30	264.92	265.16	161.19	103.97
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TOT	222606		299
AVG	37101	1546	50	200.55	201.88	159.07	41.56	265.46	265.50	161.75	103.76

MAX	40526			231.70	232.10	221.10	154.30	265.92	265.95	162.87	105.05
MIN	35712			178.20	176.30	60.20	9.70	264.92	265.08	160.35	102.65