Lower Granite Dam & Lake

May 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	2222	93	46	69.60	70.10	12.40	57.30	735.10	735.02	633.23	101.79	735.69
2				68.20	69.20	12.10	56.70	734.91	734.91	633.24	101.67	735.55
3				66.40	65.90	12.10	53.40	735.00	735.03	633.36	101.67	735.70
4				68.50	67.60	12.10	55.00	735.19	734.94	633.50	101.44	735.78
5				75.30	75.50	12.40	62.50	735.14	735.02	633.81	101.21	735.84
6				78.80	79.60	12.10	67.00	734.96	734.91	633.90	101.01	735.66
7				82.00	81.40	12.10	68.80	735.08	734.98	634.01	100.97	735.85
8				87.60	87.00	12.10	74.50	735.23	735.18	634.33	100.85	736.12
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TOT	2222		46
AVG	2222	93	46	74.55	74.54	12.17	61.90	735.08	735.00	633.67	101.33	735.77

MAX	2222			87.60	87.00	12.40	74.50	735.23	735.18	634.33	101.79	736.12
MIN	2222			66.40	65.90	12.10	53.40	734.91	734.91	633.23	100.85	735.55