Wanapum Dam & Lake

September 2025

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	13911	580	19	94.10	101.80	97.70	2.10	569.48	570.32	490.45	79.87
2	11466	478	20	78.80	84.30	80.60	1.70	568.72	568.77	488.87	79.90
3	9507	396	20	71.20	71.60	68.10	1.50	568.67	568.27	488.53	79.74
4	9514	396	19	70.70	71.40	67.80	1.60	568.57	568.57	489.06	79.51
5	7180	299	19	57.10	53.60	50.10	1.50	569.06	568.44	487.71	80.73
6	4400	183	19	33.80	33.40	29.80	1.60	569.11	568.58	486.52	82.06
7	5148	214	19	47.30	41.00	34.60	4.40	569.98	569.57	485.71	83.86
8	7450	310	19	61.30	54.40	50.30	2.10	570.92	570.47	487.38	83.09
9				50.70	53.70	49.50	2.10	570.52	570.29	487.99	82.30
10				52.20	58.20	53.10	3.10	569.70	570.03	487.95	82.08
11				53.70	60.50	56.70	1.80	568.76	569.08	488.11	80.97
12				56.70	60.80	57.40	1.50	568.18	568.24	488.14	80.10
13				50.70	45.30	41.90	1.40	568.93	568.05	487.74	80.31
14				41.30	39.20	35.50	1.70	569.22	568.92	487.27	81.65
15				52.50	51.20	47.40	1.80	569.40	569.34	487.13	82.21
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17
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20
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22
23
24
25
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27
28
29
30

TOT	68576		154
AVG	8572	357	19	58.14	58.69	54.70	1.99	569.28	569.13	487.90	81.23

MAX	13911			94.10	101.80	97.70	4.40	570.92	570.47	490.45	83.86
MIN	4400			33.80	33.40	29.80	1.40	568.18	568.05	485.71	79.51