Rock Island Dam & Reservoir

May 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	7810	325	0	169.04	171.58	124.91	46.67	612.17	612.27	574.35	37.92
2	7508	313	0	161.91	164.29	119.00	45.29	612.54	612.25	573.98	38.27
3	8032	335	0	155.46	159.41	128.82	30.59	612.43	612.20	573.97	38.23
4	8798	367	0	157.80	163.10	140.13	22.97	612.90	612.30	574.04	38.26
5	8899	371	0	170.98	177.34	145.78	31.55	612.82	612.51	574.87	37.64
6	7876	328	0	129.65	137.93	120.38	17.56	612.05	612.11	573.10	39.01
7	8473	353	0	138.12	142.60	127.94	14.66	612.11	611.77	572.27	39.50
8	7008	292	0	119.98	122.49	104.24	18.25	612.56	612.13	571.83	40.30
9	9124	380	0	166.58	171.18	146.59	24.59	612.60	612.57	574.62	37.95
10	7781	324	0	131.32	137.33	121.50	15.83	612.29	611.89	573.22	38.67
11	8752	365	0	152.51	156.90	136.77	20.14	612.70	612.20	573.47	38.73
12	8642	360	0	145.91	151.91	133.01	18.90	612.67	612.20	573.06	39.14
13	7206	300	0	133.90	138.36	108.18	30.18	612.52	612.34	572.79	39.55
14	6435	268	0	147.17	151.21	99.01	52.20	612.46	612.25	573.42	38.83
15	6641	277	0	148.08	156.47	102.33	54.14	611.63	612.57	573.48	39.09
16	5722	238	0	123.27	133.80	86.13	47.67	612.26	612.35	572.68	39.67
17	7440	310	0	128.29	136.85	110.04	26.81	612.11	612.41	572.15	40.26
18	7901	329	0	156.21	159.15	120.61	38.54	612.54	612.39	572.61	39.78
19	7811	325	0	143.77	148.93	119.78	29.15	612.64	612.44	572.66	39.78
20	8720	363	0	156.83	162.57	137.72	24.85	612.72	612.23	573.57	38.66
21	8506	354	0	146.05	152.43	132.47	19.96	612.53	612.31	573.48	38.83
22	8714	363	0	138.59	147.47	134.71	12.76	612.02	612.18	573.27	38.91
23	7416	309	0	120.77	122.74	110.05	12.70	612.56	612.21	572.13	40.08
24	6972	290	0	110.06					612.15
25	8644	360	0	135.22	140.13	125.01	15.12	612.39	612.36	571.43	40.93
26	8764	365	0	138.76	142.80	128.96	13.84	612.68	612.26	571.90	40.36
27	8448	352	0	128.50	137.00	124.55	12.46	611.54	611.91	571.51	40.40
28	9075	378	0	139.97	147.99	134.96	13.03	611.26	612.12	571.84	40.28
29				143.15	147.93	124.98	22.95	612.29	612.51	573.04	39.47
30				114.50	120.51	101.88	18.63	612.60	612.18	572.43	39.75
31				141.41	152.19	110.22	41.97	612.48	612.54	573.44	39.10

TOT	223118		0
AVG	7968	332	0	141.73	148.49	122.02	26.47	612.37	612.26	573.02	39.25

MAX	9124			170.98	177.34	146.59	54.14	612.90	612.57	574.87	40.93
MIN	5722			110.06	120.51	86.13	12.46	611.26	611.77	571.43	37.64