USGS Water-Year Summary 2024
05437610 ROCK RIVER AT LATHAM PARK, IL
LOCATION - Lat 42°22'07.08", long 89°03'26.14" referenced to North American Datum of 1983, in SW 1/4 SW 1/4 SW 1/4 sec.18, T.45 N., R.2 E., Winnebago County, IL, Hydrologic Unit 07090005, at bridge on Latham Road/Ralston Road, 0.75 mi upstream from Willow Creek, 3.1 mi downstream from McDonald Creek, 9 mi upstream of Rockford (Fordham) Dam, and at mile 146.1.
DRAINAGE AREA - 6,476 mi².
REVISIONS HISTORY - Revisions: Datum of gage is 698.74 ft NAVD88 as determined by levels from U.S. Coastal & Geodetic Survey Benchmark. Water years 2002 to 2019, datum incorrectly published as 700.00 ft above NGVD of 1929 (699.81 ft NAVD 1988).
SURFACE-WATER RECORDS
PERIOD OF RECORD -
SURFACE-WATER DISCHARGE AND STAGE
STAGE: July 2002 to current.
PARTIAL RECORD: Miscellaneous discharge measurements, water years 1927 and 2003 to
2012.
GAGE - Water-stage recorder and phone telemeter. Datum of gage is 698.74 ft above NAVD of 1988.
EXTREMES FOR PERIOD OF RECORD - STAGE: Maximum gage height, 14.46 ft, March 17 and 18, 2019, minimum, 2.75 ft, July 13, 2005.