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				128.70	125.70	117.30	1.10	75.60	75.00	11.60	63.40	11.70		92.10
5				122.30	120.30	112.00	1.00	75.70	75.30	11.70	63.60	11.80		90.80
6				115.80	110.80	102.40	1.00	76.00	75.60	11.60	64.00	11.70		89.00
7				112.60	115.60	107.20	1.00	75.90	76.00	11.90	64.10	12.00		101.40
8				116.00	119.00	110.60	1.00	75.90	75.60	11.60	64.00	11.70		100.80
9				121.40	124.40	116.10	1.00	75.20	74.90	11.50	63.40	11.60		99.50
10				119.50	122.50	114.10	1.00	75.00	74.80	11.60	63.20	11.60		100.90
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TOT	36911		292
AVG	12304	513	97	118.27	118.37	109.98	1.03	75.62	75.30	11.42	63.88	11.47	11478	97.34

MAX	12523			128.70	125.70	117.30	1.10	76.10	76.00	11.90	64.80	12.00	12474	105.30
MIN	11914			104.70	110.80	102.40	1.00	75.00	74.80	10.80	63.20	10.70	10610	89.00