Lower Monumental Dam & Lake

December 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	4198	175	18	24.70	24.40	23.80	0.00	538.94	538.89	439.31	99.58
2	2873	120	18	16.90	17.00	16.20	0.00	538.91	538.89	439.09	99.80
3	3001	125	18	17.90	17.60	16.90	0.00	539.00	538.95	439.04	99.91
4	4133	172	18	24.80	24.00	23.30	0.00	539.22	539.04	439.17	99.87
5	3746	156	18	20.70	21.90	21.10	0.00	538.88	538.86	438.97	99.89
6	3352	140	18	19.40	19.60	18.90	0.00	538.81	538.93	439.10	99.83
7	3288	137	17	19.20	19.30	18.60	0.00	538.80	538.87	439.17	99.70
8	5060	211	18	30.00	29.30	28.60	0.00	539.02	538.98	439.30	99.68
9	6173	257	17	34.00	35.40	34.80	0.00	538.59	539.07	439.40	99.67
10	6122	255	17	36.70	35.30	34.60	0.00	539.00	538.39	439.07	99.32
11	8061	336	16	43.00	46.40	45.70	0.00	537.98	538.46	439.03	99.43
12	8002	333	16	47.90	45.80	45.20	0.00	538.59	538.34	438.99	99.35
13	8311	346	17	46.50	47.60	46.80	0.00	538.28	538.50	438.91	99.59
14	7519	313	17	43.90	43.00	42.40	0.00	538.52	538.40	438.84	99.56
15	5432	226	17	32.40	31.20	30.40	0.00	538.91	538.73	438.59	100.14
16	6053	252	17	34.30	34.80	34.00	0.00	538.74	538.95	439.12	99.83
17	5498	229	17	33.00	33.00	31.00	1.20	538.76	538.59	439.09	99.50
18	8016	334	17	46.20	46.30	45.50	0.00	538.72	538.65	439.23	99.42
19	6596	275	17	36.70	37.80	37.20	0.00	538.39	538.90	438.89	100.01
20	7684	320	17	45.90	44.40	43.60	0.00	538.85	538.37	439.31	99.06
21	7970	332	18	46.10	45.30	44.80	0.00	539.09	539.16	439.38	99.78
22				42.10	41.70	41.10	0.00	539.21	539.09	439.07	100.02
23				41.00	41.00	40.50	0.00	539.20	539.35	439.36	99.99
24				30.60	30.40	29.90	0.00	539.26	539.26	439.32	99.94
25				37.10	38.10	37.70	0.00	538.98	539.10	439.33	99.77
26				43.10	43.00	42.60	0.00	539.01	538.93	439.67	99.26
27				50.30	49.30	48.90	0.00	539.28	539.10	439.69	99.41
28				54.70	55.30	54.80	0.00	539.11	539.28	439.69	99.59
29
30
31

TOT	121088		363
AVG	5766	240	17	35.68	35.65	34.96	0.04	538.86	538.86	439.18	99.67

MAX	8311			54.70	55.30	54.80	1.20	539.28	539.35	439.69	100.14
MIN	2873			16.90	17.00	16.20	0.00	537.98	538.34	438.59	99.06