Rock Island Dam & Reservoir

June 2026

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
1	7935	331	0	162.20	165.30	127.41	37.89	612.57	612.27	574.04	38.23
2	8239	343	0	183.52	189.20	134.57	54.63	612.75	612.46	574.91	37.55
3	8575	357	0	187.78	195.58	142.79	52.79	612.34	612.36	575.16	37.20
4	8388	350	0	183.35	186.77	135.64	51.12	612.53	612.38	574.54	37.84
5	8138	339	0	159.28	164.96	128.70	36.26	612.18	611.95	573.52	38.43
6	7672	320	0	163.45	165.35	121.38	43.97	612.37	612.15	574.03	38.12
7	7686	320	0	163.87	164.78	119.88	44.90	612.65	612.27	573.77	38.50
8	8859	369	0	172.92	179.45	144.10	35.35	612.39	612.20	574.36	37.84
9	7781	324	0	144.33	150.60	119.78	30.82	612.00	612.10	573.58	38.52
10	6001	250	0	111.96	111.70	84.75	26.94	611.89	611.86	570.87	40.99
11	8044	335	0	138.50	138.00	110.69	27.31	612.14	611.89	570.64	41.25
12	7773	324	0	139.66	138.63	108.94	29.69	612.26	611.92	570.74	41.18
13	8490	354	0	152.99	152.71	124.35	28.37	611.92	612.11	572.27	39.84
14	8176	341	0	158.15	156.47	126.85	29.62	612.86	611.94	573.68	38.26
15	8452	352	0	158.06	162.04	131.00	31.04	611.95	612.12	574.22	37.90
16				149.91	152.02	122.08	29.93	612.20	612.09	573.84	38.25
17				114.50	113.48	85.03	28.45	611.60	611.90	571.14	40.76
18				124.13	126.90	98.07	28.83	610.28	611.27	570.29	40.98
19				150.44	147.52	121.20	26.31	611.89	612.03	571.16	40.87
20				100.80	102.97	78.45	24.52	611.72	611.82	569.86	41.96
21				100.01	96.82	70.93	25.89	611.89	611.77	567.88	43.89
22				123.59	121.78	92.87	28.91	611.88	611.70	569.34	42.36
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TOT	120209		0
AVG	8014	334	0	147.43	149.23	114.98	34.25	612.10	612.03	572.45	39.58

MAX	8859			187.78	195.58	144.10	54.63	612.86	612.46	575.16	43.89
MIN	6001			100.01	96.82	70.93	24.52	610.28	611.27	567.88	37.20