Lower Granite Dam & Lake

January 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	6537	272	18	38.60	37.20	36.80	0.00	736.02	736.08	636.46	99.62	736.49
2	6685	279	17	37.00	38.20	37.80	0.00	735.72	735.99	636.65	99.34	736.10
3	7389	308	16	41.30	42.40	42.00	0.00	735.43	735.92	636.75	99.17	735.89
4	7027	293	16	41.30	40.10	39.70	0.00	735.73	735.89	636.30	99.59	736.10
5	8054	336	16	45.40	45.60	45.20	0.00	735.67	735.84	635.64	100.20	736.12
6	7790	325	17	43.40	43.60	43.20	0.00	735.63	736.17	634.71	101.46	737.00
7	7705	321	17	45.20	42.90	42.60	0.00	736.20	736.07	634.07	102.00	736.45
8	8819	367	17	51.00	48.80	48.50	0.00	736.76	736.64	634.52	102.12	737.20
9	8787	366	17	48.30	48.80	48.80	0.00	736.65	736.76	635.59	101.17	737.10
10	8231	343	17	45.10	46.20	46.20	0.00	736.37	736.47	636.66	99.81	737.00
11				41.30	39.30	39.30	0.00	736.86	736.27	636.91	99.36	737.40
12				42.30	43.30	43.20	0.00	736.61	735.84	636.81	99.03	736.53
13				40.60	41.40	41.20	0.00	736.42	736.66	636.93	99.73	736.36
14				39.40	39.90	39.80	0.00	736.28	736.44	636.89	99.55	736.31
15				39.60	39.10	39.10	0.00	736.40	736.40	636.58	99.82	736.45
16				39.60	42.20	42.10	0.00	735.76	735.87	636.98	98.89	735.90
17				38.20	38.30	38.30	0.00	735.74	735.70	636.47	99.23	735.72
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31

TOT	77023		166
AVG	7702	321	17	42.21	42.19	41.99	0.00	736.13	736.18	636.17	100.01	736.48

MAX	8819			51.00	48.80	48.80	0.00	736.86	736.76	636.98	102.12	737.40
MIN	6537			37.00	37.20	36.80	0.00	735.43	735.70	634.07	98.89	735.72