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	10746	448	42	217.70	225.30	58.40	165.60	263.82	263.92	160.65	103.27
7	10344	431	41	230.30	225.30	56.70	167.30	264.02	263.85	161.21	102.64
8	10413	434	42	230.40	232.90	57.00	174.70	263.92	263.98	161.20	102.78
9	10423	434	42	211.30	216.30	57.10	158.00	263.72	263.63	160.99	102.64
10	10592	441	42	206.50	196.50	57.70	137.50	264.12	263.86	160.74	103.12
11	10863	453	41	201.30	206.40	59.10	146.00	263.92	264.14	161.07	103.07
12	11040	460	41	193.20	195.70	60.30	134.20	263.82	263.95	161.20	102.75
13	11169	465	40	186.90	181.90	60.70	120.00	264.02	263.89	160.56	103.33
14	11050	460	40	181.00	183.50	59.80	122.30	263.92	263.94	160.36	103.58
15	10864	453	42	201.20	203.70	59.30	143.30	263.82	263.82	160.65	103.17
16				187.30	182.30	110.20	70.90	264.02	263.63	160.89	102.74
17				189.30	184.10	118.80	64.10	264.22	264.18	160.93	103.25
18				176.40	184.10	119.00	64.00	263.92	264.05	160.81	103.24
19				162.40	169.90	104.70	63.90	263.62	263.95	160.69	103.26
20				157.70	145.20	84.80	59.00	264.12	263.82	160.41	103.41
21				155.10	160.20	108.00	51.00	263.92	264.23	161.04	103.19
22				150.00	147.50	90.00	56.30	264.02	264.14	160.67	103.47
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TOT	190201		625
AVG	12680	528	42	200.67	201.64	80.53	119.87	263.97	263.99	160.88	103.10

MAX	24065			242.70	250.20	130.50	184.80	264.42	264.55	161.41	103.58
MIN	10344			150.00	145.20	56.70	51.00	263.62	263.63	160.36	102.28