Priest Rapids Dam & Reservoir

September 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	12227	509	49	100.60	102.90	88.70	13.60	485.95	486.67	408.39	78.28
2	10492	437	45	74.80	77.40	74.70	2.20	485.21	485.56	406.20	79.36
3	11500	479	45	82.90	86.90	84.10	2.10	484.04	484.52	407.00	77.52
4	6594	275	39	53.80						402.97
5	7432	310	39	53.60	54.30	51.50	2.20	485.70	485.74	403.77	81.97
6				42.60	43.70	41.10	2.00	485.37	485.21	402.57	82.64
7				47.70	48.80	46.40	1.80	485.05	484.46	403.19	81.27
8				55.70	56.00	54.20	1.10	484.99	484.94	403.91	81.03
9				65.50	64.20	62.10	1.40	485.35	484.74	404.79	79.95
10				49.60	43.30	40.50	2.20	487.10	485.43	402.54	82.89
11				41.00	39.20	36.20	2.50	487.56	486.18	402.07	84.11
12				34.20	38.40	35.20	2.60	486.45	486.48	401.97	84.51
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TOT	48245		217
AVG	9649	402	43	58.50	59.55	55.88	3.06	485.71	485.45	404.11	81.23

MAX	12227			100.60	102.90	88.70	13.60	487.56	486.67	408.39	84.51
MIN	6594			34.20	38.40	35.20	1.10	484.04	484.46	401.97	77.52