Bonneville Dam & Lake on Columbia River

June 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	7167	299	96	240.70	237.70	75.30	149.90	73.30	73.20	19.10	54.10	18.90	7167	75.30
2	8001	333	96	249.10	247.10	84.70	150.10	73.60	73.30	19.60	53.70	19.50	7500	79.30
3	6363	265	96	233.40	228.40	65.60	150.40	74.10	73.60	18.70	54.90	18.60	6269	64.60
4	6924	288	96	236.80	234.80	71.50	150.90	74.20	73.90	18.90	55.00	18.70	6567	67.80
5	5588	233	96	216.70	220.70	57.50	150.80	73.90	73.80	18.20	55.60	18.00	5588	57.30
6	4030	168	96	209.00	203.00	40.20	150.40	74.50	73.50	17.20	56.30	17.00	4030	40.20
7	3621	151	96	196.50	198.50	35.80	150.40	74.30	73.50	16.80	56.70	16.60	3621	35.80
8	3175	132	96	181.40	193.40	31.40	149.60	72.70	73.00	16.40	56.60	16.30	3175	31.40
9	3244	135	96	192.60	176.60	31.20	132.90	74.70	73.40	15.40	58.00	15.30	3244	31.20
10	3314	138	96	179.10	180.10	31.70	136.00	74.50	74.10	15.60	58.50	15.50	3314	31.70
11	3314	138	96	181.60	177.60	31.70	133.50	74.90	73.90	15.40	58.50	15.40	3314	31.70
12	3323	138	96	172.90	169.90	31.40	126.20	75.20	74.40	15.10	59.30	15.00	3323	31.40
13	3417	142	96	162.80	169.80	32.00	125.40	74.50	74.60	14.90	59.70	14.80	3416	32.00
14	3391	141	96	170.30	165.30	31.80	121.10	75.10	74.30	14.50	59.80	14.40	3391	31.80
15	3315	138	96	174.70	169.70	31.10	126.20	75.40	74.70	14.80	59.90	14.70	3315	31.10
16	7760	323	96	176.70	181.70	74.10	95.20	75.00	74.60	15.40	59.20	15.30	7760	74.10
17	4832	201	96	155.00	152.00	44.30	95.30	75.40	74.90	13.70	61.20	13.70	4832	44.30
18	5067	211	96	152.20	154.20	46.20	95.60	75.20	75.00	13.60	61.40	14.00	5067	46.20
19	6622	276	96	161.50	169.50	61.80	95.30	74.30	74.60	14.60	60.00	15.00	6622	61.80
20	3585	149	96	146.20	138.20	32.60	93.20	75.10	74.20	12.70	61.50	12.80	3585	32.60
21	3439	143	96	129.60	134.60	30.80	91.40	74.70	74.70	12.30	62.40	12.40	3439	30.80
22	3780	158	96	146.40	138.40	34.00	92.00	75.40	74.70	12.50	62.20	12.60	3780	34.00
23	4611	192	96	146.10	149.10	42.40	94.30	75.10	74.60	13.30	61.30	13.30	4611	42.40
24	5245	219	96	153.10	155.10	48.40	94.30	75.00	74.90	14.00	60.90	14.00	5245	48.40
25	4152	173	96	145.70	144.70	38.00	94.30	75.00	74.60	13.50	61.10	13.50	4152	38.00
26	3455	144	96	138.30	138.30	31.30	94.60	75.00	74.40	12.90	61.50	12.90	3455	31.30
27	4904	204	96	157.30	152.30	44.90	95.00	75.50	74.90	13.80	61.10	13.80	4904	44.90
28	3764	157	96	142.50	141.50	34.00	95.10	75.60	75.10	13.30	61.80	13.20	3764	34.00
29				133.30	138.30	31.20	94.70	75.20	74.80	12.70	62.10	12.60		31.20
30				138.30	137.30	31.10	93.80	75.20	74.50	12.40	62.10	12.40		31.10

TOT	129403		2688
AVG	4622	193	96	173.99	173.26	43.60	117.26	74.72	74.26	15.04	59.21	15.01	4588	43.26

MAX	8001			249.10	247.10	84.70	150.90	75.60	75.10	19.60	62.40	19.50	7760	79.30
MIN	3175			129.60	134.60	30.80	91.40	72.70	73.00	12.30	53.70	12.40	3175	30.80