Rock Island Dam & Reservoir

September 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
1	6162	257	0	88.32	90.18	89.19	0.99	611.82	611.79	571.54	40.25
2	5280	220	0	73.99	73.69	73.69	0.00	611.74	611.92	569.96	41.96
3	4663	194	0	66.31	65.45	64.55	0.91	611.81	611.92	569.38	42.54
4	4856	202	0	67.86	67.52	67.52	0.00	611.79	611.88	569.58	42.30
5	3764	157	0	51.11	51.11	51.11	0.00	611.83	611.84	569.00	42.84
6	2146	89	0	30.92	30.00	30.00	0.00	611.97	611.02	568.67	42.35
7	3297	137	0	46.01	45.29	45.29	0.00	612.26	611.79	569.76	42.03
8	4026	168	0	57.12	58.80	58.80	0.00	611.75	611.59	570.90	40.69
9	3550	148	0	49.73	51.10	51.10	0.00	611.65	611.67	570.56	41.11
10	3334	139	0	46.95	47.89	47.89	0.00	611.50	611.66	570.33	41.33
11	3603	150	0	48.97	48.33	48.33	0.00	612.14	611.86	569.46	42.40
12	3921	163	0	52.17	53.44	53.44	0.00	611.43	611.93	568.84	43.09
13	3653	152	0	49.46	49.45	49.45	0.00	612.05	611.57	568.56	43.01
14	2802	117	0	37.20	38.31	38.31	0.00	611.77	611.76	569.08	42.68
15	3450	144	0	47.16	49.18	49.18	0.00	610.83	611.25	569.74	41.51
16	4884	204	0	75.04	72.75	70.62	2.13	612.34	611.90	570.58	41.32
17	5904	246	0	82.83	87.16	87.16	0.00	612.04	611.93	571.59	40.34
18	5732	239	0	87.95	89.30	83.80	5.50	611.84	612.21	571.03	41.18
19	5845	244	0	84.45	86.30	85.78	0.52	611.88	611.90	571.24	40.66
20	3822	159	0	52.44	54.47	54.47	0.00	612.03	611.72	569.81	41.91
21	2583	108	0	34.63	34.08	34.08	0.00	612.01	611.94	568.08	43.86
22	4310	180	0	57.43	58.30	58.30	0.00	611.09	611.92	569.33	42.59
23	3855	161	0	54.29	51.83	51.83	0.00	612.25	611.92	568.91	43.01
24	4567	190	0	60.53	63.04	63.04	0.00	611.72	611.57	569.06	42.51
25	2588	108	0	33.87	32.89	32.89	0.00	611.65	611.85	567.32	44.53
26	3614	151	0	46.40	46.17	46.17	0.00	611.29	611.76	567.21	44.55
27	4430	185	0	61.17	60.40	59.88	0.52	612.10	611.88	568.78	43.10
28	2443	102	0	34.21	33.50	33.50	0.00	612.14	611.65	568.61	43.04
29	4838	202	0	63.25	65.92	65.92	0.00	611.73	611.91	569.46	42.45
30	3446	144	0	46.78	46.57	46.57	0.00	611.75	611.69	569.37	42.32

TOT	121368		0
AVG	4046	169	0	56.29	56.75	56.40	0.35	611.81	611.77	569.52	42.25

MAX	6162			88.32	90.18	89.19	5.50	612.34	612.21	571.59	44.55
MIN	2146			30.92	30.00	30.00	0.00	610.83	611.02	567.21	40.25