Bonneville Dam & Lake on Columbia River

July 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	3654	152	96	139.30	139.30	32.90	94.00	75.20	74.60	12.60	62.00	12.60	3473	31.20
2	4895	204	96	156.40	151.40	44.80	94.20	75.80	74.80	13.30	61.50	13.30	4895	44.80
3	3919	163	96	139.00	142.00	35.40	94.20	75.40	74.80	12.90	61.90	12.80	3919	35.40
4	3604	150	96	120.40	132.40	32.40	87.60	74.30	74.60	12.00	62.60	12.00	3604	32.40
5				121.30	116.30	32.20	71.70	74.70	74.20	10.80	63.40	10.70		32.20
6				126.10	120.10	32.70	75.00	75.30	74.50	11.00	63.50	11.00		32.70
7				120.40	116.40	31.90	72.20	75.70	74.90	10.90	64.00	10.80		31.90
8				128.70	131.70	32.80	86.40	75.40	75.20	11.90	63.30	11.90		32.10
9				117.00	116.00	31.40	72.20	75.50	74.90	11.10	63.80	11.10		31.40
10				107.10	104.10	31.00	60.70	75.80	75.30	10.10	65.20	9.90		31.00
11				106.40	102.40	31.40	58.60	76.30	76.10	9.90	66.20	9.80		31.40
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TOT	16072		384
AVG	4018	167	96	125.65	124.74	33.54	78.80	75.40	74.90	11.50	63.40	11.45	3973	33.32

MAX	4895			156.40	151.40	44.80	94.20	76.30	76.10	13.30	66.20	13.30	4895	44.80
MIN	3604			106.40	102.40	31.00	58.60	74.30	74.20	9.90	61.50	9.80	3473	31.00