John Day & Lake Umatilla

June 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	225.40	241.10	60.10	179.70	264.22	264.55	160.97	103.58
2	241.40	246.60	60.70	184.80	264.02	264.03	160.86	103.17
3	242.70	250.20	90.80	158.20	263.72	263.69	161.41	102.28
4	226.40	208.50	130.50	76.60	264.42	264.21	160.79	103.42
5	240.90	248.80	107.90	139.80	264.11	264.24	161.32	102.92
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30

TOT
AVG	235.36	239.04	90.00	147.82	264.10	264.14	161.07	103.07

MAX	242.70	250.20	130.50	184.80	264.42	264.55	161.41	103.58
MIN	225.40	208.50	60.10	76.60	263.72	263.69	160.79	102.28