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Streamflow Measurements for the Nation

! Streamflow measurement pages will be decommissioned in early 2026. Please find the modernized pages in WDFN that suit you best. Learn more about our modernization plans and timeline and new pages.

USGS 05437645 ROCK RIVER ABOVE DAM AT ROCKFORD, IL
Winnebago County, Illinois
Hydrologic Unit Code 07090005
Latitude  42°15'59.5", Longitude  89°05'45.7" NAD83
Drainage area 6,535  square miles
Gage datum 700.19 feet above NAVD88
Output formats
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Meas.
Number		   Date       Time Time
Datum		 Measurement
Used?		   Who Measuring
Agency		 Stream
flow
(ft3/s)		 Gage
Height
(ft)		 GH
Change
(ft)		 Meas.
Duration
(hr)		 Meas.
Rated		   Control Flow
Adjust.
Code 
12015-04-27 12:31:19CSTYesmelUSGS63302.20-0.010.30GoodDebrisLightNONE