Rock Island Dam & Reservoir

September 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	7077	295	0	96.29	98.24	97.70	0.54	612.06	612.14	570.90	41.24
2	5156	215	0	71.23	69.24	69.00	0.24	612.58	612.25	569.54	42.71
3	4410	184	0	55.40	56.91	56.37	0.55	612.08	612.20	568.30	43.90
4	4834	201	0	61.27			0.00	611.97		567.48
5	3555	148	0	45.50	45.27	45.27	0.00	612.20	611.97	567.37	44.60
6				38.64	40.37	40.37	0.00	611.65	611.95	567.18	44.77
7				44.31	43.67	43.08	0.59	611.68	612.17	567.32	44.85
8				52.18	52.14	52.14	0.00	611.86	611.97	566.94	45.03
9				56.33	57.40	55.67	1.73	611.69	611.96	566.97	44.99
10				43.98	45.30	44.17	1.13	611.30	611.79	566.10	45.69
11				43.30	41.17	40.06	1.11	611.99	611.81	566.00	45.81
12				46.14	44.05	44.05	0.00	611.81	612.24	566.68	45.56
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TOT	25032		0
AVG	5006	209	0	54.55	53.98	53.44	0.49	611.91	612.04	567.57	44.47

MAX	7077			96.29	98.24	97.70	1.73	612.58	612.25	570.90	45.81
MIN	3555			38.64	40.37	40.06	0.00	611.30	611.79	566.00	41.24