Lower Monumental Dam & Lake

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	2910	121	22	20.40	21.10	16.40	3.90	538.52	538.37	438.05	100.32
2	2276	95	16	17.60	17.50	12.80	3.90	538.57	538.27	438.08	100.19
3	3479	145	14	21.70	21.80	19.60	1.40	538.55	538.62	438.53	100.09
4	3019	126	14	22.00	21.80	17.00	4.10	538.57	538.72	438.61	100.11
5	3883	162	14	27.00	26.80	21.90	4.10	538.65	538.70	438.73	99.97
6	2879	120	14	23.10	24.60	16.20	7.80	538.20	538.29	438.35	99.94
7	3283	137	14	24.00	23.20	18.60	4.00	538.43	538.39	438.54	99.85
8	3068	128	14	23.20	22.10	17.30	4.00	538.77	538.38	438.39	99.99
9	3351	140	14	24.40	23.70	18.90	4.00	538.97	538.48	438.62	99.86
10	3599	150	14	24.10	25.20	20.30	4.00	538.64	538.51	438.56	99.95
11	3577	149	14	25.60	24.80	20.20	4.10	538.87	538.63	438.58	100.05
12	2330	97	14	19.60	21.70	13.10	7.80	538.23	538.36	438.07	100.29
13	2533	106	14	19.20	18.90	14.30	3.90	538.33	538.21	438.40	99.81
14	2763	115	14	20.70	20.50	15.60	3.80	538.41	538.40	438.63	99.77
15	2884	120	14	20.80	21.20	16.30	4.00	538.25	538.35	438.81	99.54
16	2721	113	14	20.40	20.10	15.30	4.00	538.39	538.40	438.65	99.75
17	2371	99	14	18.90	18.30	13.50	4.00	538.54	538.39	438.44	99.95
18				18.50	18.80	14.20	4.00	538.47	538.56	438.56	100.00
19				19.00	19.10	14.20	4.10	538.43	538.63	438.50	100.13
20				17.60	17.20	12.40	4.00	538.52	538.49	438.41	100.08
21				14.10	14.60	12.50	1.40	538.39	538.37	438.61	99.76
22				18.50	18.20	15.90	1.40	538.47	538.56	438.74	99.82
23				19.00	18.00	13.10	4.20	538.25	538.38	438.55	99.83
24				14.90	14.90	12.60	1.30	538.25	538.24	438.48	99.76
25
26
27
28
29
30

TOT	50927		248
AVG	2996	125	15	20.60	20.59	15.92	3.88	538.49	538.45	438.50	99.95

MAX	3883			27.00	26.80	21.90	7.80	538.97	538.72	438.81	100.32
MIN	2276			14.10	14.60	12.40	1.30	538.20	538.21	438.05	99.54