Bonneville Dam & Lake on Columbia River

March 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	Project Average Tailwater	2nd Powerhouse Total MWh	2nd Powerhouse Flow kcfs
1	15523	647	96	155.10	154.10	147.20	0.60	73.10	73.20	14.80	58.40	14.90	10631	102.30
2	15019	626	96	152.90	147.90	141.20	0.70	73.60	73.20	14.40	58.80	14.50	10187	97.00
3	14974	624	96	148.20	146.20	139.30	0.60	73.80	73.50	14.10	59.40	14.20	10305	97.40
4	14817	617	96	147.20	144.20	137.40	0.60	74.20	73.50	13.80	59.70	14.00	10405	97.90
5	15315	638	96	144.40	151.40	142.70	1.30	73.40	73.40	14.00	59.40	14.10	10078	95.20
6	14440	602	96	147.80	144.80	135.10	1.50	73.60	73.10	13.50	59.60	13.60	8948	84.30
7	15007	625	96	147.50	150.50	140.90	1.30	73.50	73.10	13.70	59.40	13.70	10191	96.70
8	13867	578	96	136.00	137.00	127.40	1.40	73.30	73.40	12.50	60.90	12.60	9761	90.50
9								73.70
10								74.00
11								74.10
12								73.70
13								73.20
14								73.90
15								73.90
16								73.10
17								73.00
18								73.00
19								72.70
20								73.50
21								73.70
22								73.90
23								73.70
24								74.00
25								72.80
26								72.10
27								72.90
28								73.10
29								73.50
30								72.80
31								73.00

TOT	118962		768
AVG	14870	620	96	147.39	147.01	138.90	1.00	73.41	73.30	13.85	59.45	13.95	10063	95.16

MAX	15523			155.10	154.10	147.20	1.50	74.20	73.50	14.80	60.90	14.90	10631	102.30
MIN	13867			136.00	137.00	127.40	0.60	72.10	73.10	12.50	58.40	12.60	8948	84.30