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	20176	841	42	187.30	182.30	110.20	70.90	264.02	263.63	160.89	102.74
17	21848	910	42	189.30	184.10	118.80	64.10	264.22	264.18	160.93	103.25
18	21868	911	42	176.40	184.10	119.00	64.00	263.92	264.05	160.81	103.24
19	19298	804	42	162.40	169.90	104.70	63.90	263.62	263.95	160.69	103.26
20	15666	653	41	157.70	145.20	84.80	59.00	264.12	263.82	160.41	103.41
21	19865	828	41	155.10	160.20	108.00	51.00	263.92	264.23	161.04	103.19
22	16557	690	42	150.00	147.50	90.00	56.30	264.02	264.14	160.67	103.47
23	20648	860	43	164.20	164.90	112.70	51.00	264.02	264.07	161.16	102.91
24	23262	969	43	181.60	186.50	127.10	58.10	263.82	263.89	161.29	102.60
25	20662	861	39	170.70	179.10	112.80	65.10	263.82	263.82	161.19	102.63
26	18392	766	43	161.80	164.30	100.80	62.30	263.62	263.64	161.21	102.43
27	17359	723	44	150.20	152.70	94.30	57.10	263.62	263.50	160.43	103.07
28	14432	601	43	119.20	134.00	78.50	54.20	263.01	263.33	160.19	103.14
29	16343	681	44	157.10	137.30	89.10	47.10	263.82	263.31	160.47	102.84
30	23140	964	45	181.00	176.10	126.70	48.10	264.02	263.99	161.30	102.69

TOT	479719		1261
AVG	15991	666	42	190.02	191.03	87.12	102.67	263.91	263.91	160.89	103.02

MAX	24065			242.70	250.20	130.50	184.80	264.42	264.55	161.41	103.58
MIN	10344			119.20	134.00	56.70	47.10	263.01	263.31	160.19	102.28