Wanapum 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
1	18542	773	18	142.40	139.50	138.10	0.00	569.03	567.94	492.15	75.79
2	19502	813	18	149.60	144.40	143.00	0.00	569.75	569.26	492.43	76.83
3	19740	822	17	146.50	147.20	145.80	0.00	569.65	569.32	492.79	76.53
4	18362	765	17	128.20	134.90	133.50	0.00	568.73	569.51	492.24	77.27
5	17429	726	17	133.40	130.40	129.00	0.00	569.13	567.86	491.73	76.13
6	19269	803	17	156.20	142.40	140.90	0.10	571.02	569.80	492.53	77.27
7	21176	882	17	167.20	167.80	156.70	9.80	570.94	570.90	493.86	77.04
8	20614	859	18	164.30	165.10	152.10	11.60	570.83	570.96	493.76	77.20
9	21440	893	17	154.30	161.70	160.30	0.00	569.81	570.19	493.44	76.75
10				153.60	145.60	144.20	0.00	570.90	570.07	492.75	77.32
11				154.50	151.70	150.30	0.00	571.28	570.99	493.20	77.79
12				158.50	159.80	154.10	4.30	571.10	571.02	493.63	77.39
13				163.10	164.90	162.10	1.40	570.86	570.84	493.65	77.19
14				157.20	155.20	151.30	2.50	571.13	570.80	493.25	77.55
15				164.60	169.70	164.80	3.50	570.42	570.92	493.97	76.95
16				171.70	172.10	170.70	0.00	570.38	570.07	493.96	76.11
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TOT	176074		156
AVG	19564	815	17	154.08	153.27	149.81	2.08	570.31	570.03	493.08	76.94

MAX	21440			171.70	172.10	170.70	11.60	571.28	571.02	493.97	77.79
MIN	17429			128.20	130.40	129.00	0.00	568.73	567.86	491.73	75.79