Lower Granite Dam & Lake

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	Midnight Lewiston Gage ft
1	2159	90	51	67.30	66.50	12.10	53.70	735.53	735.38	633.89	101.49	736.17
2	2173	91	51	60.20	60.80	12.10	48.30	735.39	735.41	633.63	101.78	735.93
3	2161	90	51	55.70	55.30	12.10	42.80	735.49	735.51	633.61	101.90	736.05
4	2155	90	50	51.60	52.60	12.10	40.10	735.19	735.30	633.72	101.58	735.73
5	2161	90	50	51.30	50.20	12.10	37.70	735.50	735.32	633.69	101.63	736.08
6	2155	90	50	51.70	50.70	12.10	38.20	735.72	735.67	633.98	101.69	736.35
7	2164	90	50	52.50	53.00	12.10	40.30	735.61	735.64	633.97	101.67	736.10
8	2165	90	51	52.70	52.50	12.10	39.80	735.68	735.60	633.92	101.68	736.22
9	2157	90	51	50.80	52.20	12.10	39.70	735.28	735.44	634.10	101.34	735.86
10	2161	90	51	49.80	49.20	12.10	36.50	735.46	735.28	633.95	101.33	735.96
11	2161	90	51	50.00	50.60	12.10	38.00	735.32	735.30	633.86	101.44	735.75
12	2165	90	51	45.70	45.50	12.10	32.90	735.37	735.35	633.50	101.85	735.84
13	2162	90	51	41.70	40.60	12.00	28.10	735.64	735.51	633.27	102.24	736.10
14	2183	91	51	38.50	38.60	12.20	26.10	735.63	735.64	633.45	102.19	736.04
15	2176	91	51	37.80	36.10	12.10	23.50	736.01	735.88	633.23	102.65	736.43
16				37.60	39.50	12.20	26.80	735.57	735.76	633.74	102.02	736.11
17				38.10	36.70	12.30	23.90	735.91	735.67	633.80	101.87	736.30
18				36.10	36.70	12.30	24.00	735.78	735.88	634.03	101.85	736.21
19				34.40	33.50	12.10	20.90	735.97	735.96	633.87	102.09	736.38
20				31.70	33.30	12.20	20.60	735.60	735.78	634.07	101.71	736.05
21				30.70	31.30	12.30	18.60	735.44	735.53	634.35	101.18	735.84
22				31.70	31.60	12.60	18.50	735.48	735.45	634.29	101.16	735.89
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30

TOT	32458		760
AVG	2164	90	51	45.35	45.32	12.16	32.68	735.57	735.56	633.81	101.74	736.06

MAX	2183			67.30	66.50	12.60	53.70	736.01	735.96	634.35	102.65	736.43
MIN	2155			30.70	31.30	12.00	18.50	735.19	735.28	633.23	101.16	735.73