Wanapum Dam & Lake

March 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	19607	817	18	132.10	144.50	143.10	0.00	568.28	569.47	492.35	77.12
2	17359	723	17	131.90	128.10	126.20	0.50	568.81	568.63	491.59	77.04
3	17889	745	17	126.70	133.70	132.30	0.00	567.84	568.15	491.59	76.56
4	15527	647	18	119.30	117.30	114.40	1.50	568.12	567.96	490.40	77.56
5	15445	644	18	133.90	119.50	110.80	7.30	570.10	569.46	490.34	79.12
6	15443	643	19	144.80	136.70	109.40	25.90	571.22	570.94	491.66	79.28
7	11504	479	18	128.20	141.60	82.40	57.80	569.38	570.20	491.81	78.39
8	11288	470	17	115.60	130.80	86.70	42.80	567.40	568.24	490.70	77.54
9	15106	629	22	129.00	126.40	112.10	12.90	567.62	567.48	490.65	76.83
10	16638	693	21	146.60	121.50	119.10	1.00	571.04	569.36	490.68	78.68
11	20043	835	19	142.80	151.40	146.70	3.30	570.19	570.49	492.60	77.89
12	18882	787	19	134.90	138.30	136.90	0.00	569.46	569.77	491.85	77.92
13				159.80	155.40	154.00	0.00	570.23	569.66	492.60	77.06
14				137.10	137.00	125.60	10.00	570.25	570.70	491.55	79.15
15				126.50	140.80	139.40	0.00	568.11	569.05	491.82	77.23
16				127.40	109.90	108.50	0.00	570.67	569.52	490.12	79.40
17				116.60	116.90	115.50	0.00	570.49	570.56	490.91	79.65
18				127.60	127.40	126.00	0.00	570.49	569.83	491.75	78.08
19				129.20	124.30	118.30	4.50	571.29	570.51	491.12	79.39
20								571.02
21
22
23
24
25
26
27
28
29
30
31

TOT	194731		223
AVG	16228	676	19	132.11	131.66	121.44	8.82	569.60	569.47	491.37	78.10

MAX	20043			159.80	155.40	154.00	57.80	571.29	570.94	492.60	79.65
MIN	11288			115.60	109.90	82.40	0.00	567.40	567.48	490.12	76.56