Wanapum Dam & Lake

July 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	17809	742	17	150.80	149.50	127.60	19.90	570.49	570.13	492.16	77.97
2	17532	730	17	140.70	147.10	125.50	19.60	569.62	569.68	491.99	77.69
3	16197	675	18	131.70	137.90	117.30	18.60	568.77	568.29	491.28	77.01
4	16005	667	18	140.00	136.40	115.50	18.90	569.26	568.76	491.31	77.45
5	16206	675	18	126.70	138.10	117.70	18.50	567.67	568.07	491.40	76.67
6	16366	682	19	127.80	141.70	122.50	17.20	565.73	566.22	491.46	74.76
7	13143	548	18	112.10	116.70	98.50	16.30	565.07	564.90	489.91	74.99
8	11184	466	19	101.80	101.10	82.90	16.20	565.16	564.77	489.14	75.63
9	12045	502	18	119.90	107.50	88.70	16.80	566.92	565.64	489.44	76.20
10	11989	500	18	104.50	106.70	87.50	17.10	566.61	566.16	489.50	76.66
11	10954	456	18	122.00	98.00	77.60	18.30	569.96	567.96	489.10	78.86
12	12946	539	18	109.40	113.20	92.40	18.90	569.43	568.69	490.14	78.55
13	14339	597	18	111.70	124.10	103.60	18.50	567.71	568.11	490.17	77.94
14	11058	461	19	111.80	98.50	77.50	19.00	569.56	568.91	488.64	80.27
15	13065	544	19	104.70	113.30	92.50	18.90	568.36	568.66	489.55	79.11
16	12218	509	19	96.30	108.20	88.80	17.40	566.69	566.48	489.55	76.93
17	8209	342	19	87.30	77.60	58.50	17.10	568.05	566.19	487.84	78.35
18	9252	386	18	85.50	86.00	65.90	18.00	567.99	567.47	488.78	78.69
19	11950	498	19	105.40	106.80	86.40	18.40	567.79	568.04	490.17	77.87
20	12275	511	20	101.80	109.60	90.10	17.50	566.69	566.62	490.41	76.21
21	10830	451	20	96.60	99.10	80.30	16.90	566.35	565.76	489.87	75.89
22	11051	460	21	115.80	100.30	80.40	17.80	568.51	567.20	489.57	77.63
23	13443	560	21	117.10	117.30	96.80	18.40	568.49	568.04	490.07	77.97
24	13006	542	22	111.80	114.80	95.00	17.80	568.08	567.06	489.85	77.21
25	9552	398	21	80.30	87.60	67.60	18.00	567.05	567.37	488.19	79.18
26	10296	429	21	100.90	93.20	72.90	18.30	568.13	567.82	488.98	78.84
27	11987	499	19	109.70	105.70	85.50	18.20	568.68	567.69	489.40	78.29
28	10978	457	19	95.70	97.90	77.40	18.50	568.38	568.08	488.89	79.19
29	12758	532	18	106.30	112.20	92.40	17.80	567.56	567.18	489.93	77.25
30	9473	395	20	95.50	87.30	67.70	17.60	568.70	566.87	488.60	78.27
31				114.10	114.60	94.20	18.50	568.63	568.07	490.20	77.87

TOT	378116		569
AVG	12604	525	19	110.83	111.23	91.20	18.03	567.94	567.45	489.85	77.59

MAX	17809			150.80	149.50	127.60	19.90	570.49	570.13	492.16	80.27
MIN	8209			80.30	77.60	58.50	16.20	565.07	564.77	487.84	74.76