Bonneville Dam & Lake on Columbia River

November 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	11914	496	96	122.80	112.80	104.30	1.10	76.10	75.60	10.80	64.80	10.70	11349	99.50
2	12474	520	100	104.70	113.70	105.30	1.00	75.30	75.30	10.90	64.40	10.90	12474	105.30
3	12523	522	96	118.90	118.90	110.50	1.10	75.50	74.90	11.00	63.90	11.00	10610	94.10
4	13228	551	96	128.70	125.70	117.30	1.10	75.60	75.00	11.60	63.40	11.70	10303	92.10
5	12658	527	96	122.30	120.30	112.00	1.00	75.70	75.30	11.70	63.60	11.80	10204	90.80
6	11601	483	96	115.80	110.80	102.40	1.00	76.00	75.60	11.60	64.00	11.70	10042	89.00
7	12115	505	96	112.60	115.60	107.20	1.00	75.90	76.00	11.90	64.10	12.00	11439	101.40
8	12474	520	96	116.00	119.00	110.60	1.00	75.90	75.60	11.60	64.00	11.70	11296	100.80
9	12994	541	96	121.40	124.40	116.10	1.00	75.20	74.90	11.50	63.40	11.60	11081	99.50
10	12753	531	96	119.50	122.50	114.10	1.00	75.00	74.80	11.60	63.20	11.60	11228	100.90
11	12879	537	96	120.40	123.40	115.00	1.00	74.90	74.90	11.50	63.40	11.60	11104	99.70
12	13140	548	96	122.80	126.80	118.40	1.00	74.30	74.10	11.50	62.60	11.50	11441	103.60
13	12931	539	96	121.20	126.20	117.80	1.00	73.80	73.50	11.60	61.90	11.60	11291	103.30
14				124.80	122.80	114.50	1.00	73.90	73.30	11.60	61.70	11.50		99.70
15				125.80	122.80	114.40	1.00	74.30	73.70	11.50	62.20	11.50		100.60
16				125.40	124.40	116.00	1.00	74.30	73.90	11.70	62.20	11.60		100.90
17				120.00	120.00	111.60	1.10	74.40	73.70	11.60	62.10	11.60		100.90
18				123.90	122.90	114.40	1.10	74.60	73.90	11.50	62.40	11.60		102.60
19				133.20	127.20	118.80	1.10	75.10	74.60	11.50	63.10	11.60		100.10
20				129.90	124.90	116.40	1.10	75.70	75.00	11.70	63.30	11.70		101.40
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TOT	163684		1252
AVG	12591	525	96	121.50	121.26	112.86	1.04	75.07	74.68	11.49	63.19	11.52	11066	99.31

MAX	13228			133.20	127.20	118.80	1.10	76.10	76.00	11.90	64.80	12.00	12474	105.30
MIN	11601			104.70	110.80	102.40	1.00	73.80	73.30	10.80	61.70	10.70	10042	89.00