Lower Granite Dam & Lake

April 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	9909	413	45	66.50	64.90	56.60	7.90	735.12	735.18	634.19	100.99	735.63
2	10521	438	47	68.90	68.50	60.00	7.90	735.30	735.12	633.98	101.14	735.81
3	2295	96	47	74.00	74.20	12.80	60.90	735.21	735.19	633.55	101.64	735.69
4	2212	92	48	71.60	71.80	12.40	59.00	735.14	735.09	633.72	101.37	735.60
5	2127	89	47	68.20	68.00	12.00	55.70	735.20	734.96	633.62	101.34	735.46
6	2133	89	47	66.50	66.80	12.00	54.20	735.09	734.95	633.44	101.51	735.38
7				65.00	64.90	12.00	52.40	735.11	734.97	633.27	101.70	735.51
8				64.80	63.80	12.00	51.20	735.44	735.21	633.37	101.84	735.83
9				65.60	65.60	12.00	53.20	735.44	735.50	633.68	101.82	735.85
10				64.80	66.20	12.00	53.80	735.06	735.25	633.81	101.44	735.55
11				64.90	63.80	12.00	51.30	735.34	735.19	633.82	101.37	735.79
12				70.30	70.70	12.20	58.10	735.21	735.16	634.09	101.07	735.73
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TOT	29199		281
AVG	4866	203	47	67.59	67.43	19.83	47.13	735.22	735.15	633.71	101.44	735.65

MAX	10521			74.00	74.20	60.00	60.90	735.44	735.50	634.19	101.84	735.85
MIN	2127			64.80	63.80	12.00	7.90	735.06	734.95	633.27	100.99	735.38