John Day & Lake Umatilla

June 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	11159	465	42	225.40	241.10	60.10	179.70	264.22	264.55	160.97	103.58
2	11155	465	42	241.40	246.60	60.70	184.80	264.02	264.03	160.86	103.17
3	16514	688	42	242.70	250.20	90.80	158.20	263.72	263.69	161.41	102.28
4	24065	1003	43	226.40	208.50	130.50	76.60	264.42	264.21	160.79	103.42
5	19805	825	42	240.90	248.80	107.90	139.80	264.11	264.24	161.32	102.92
6				217.70	225.30	58.40	165.60	263.82	263.92	160.65	103.27
7				230.30	225.30	56.70	167.30	264.02	263.85	161.21	102.64
8				230.40	232.90	57.00	174.70	263.92	263.98	161.20	102.78
9				211.30	216.30	57.10	158.00	263.72	263.63	160.99	102.64
10				206.50	196.50	57.70	137.50	264.12	263.86	160.74	103.12
11				201.30	206.40	59.10	146.00	263.92	264.14	161.07	103.07
12				193.20	195.70	60.30	134.20	263.82	263.95	161.20	102.75
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30

TOT	82699		212
AVG	16540	689	42	222.29	224.47	71.36	151.87	263.99	264.00	161.03	102.97

MAX	24065			242.70	250.20	130.50	184.80	264.42	264.55	161.41	103.58
MIN	11155			193.20	195.70	56.70	76.60	263.72	263.63	160.65	102.28