Station list
05568000 MACKINAW RIVER NEAR GREEN VALLEY, IL
LOCATION.--Lat 40°27'15", long 89°36'22", in SE¼SE¼ sec.12, T.23 N., R.5 W., Tazewell County, Hydrologic Unit 07130004,
on right downstream side of bridge on Towerline Road, 2.5 mi east of State Highway 29, 3.9 mi northeast of Green Valley,
5.8 mi south of Pekin, 10.2 mi north of U.S. Highway 136, and at mile 17.3.
DRAINAGE AREA.--1,073 mi2. Area at site used prior to Oct. 1, 1988, 1,089 mi2.
PERIOD OF RECORD.--March 1921 to October 1956; annual maximum, water years 1957-88; October 1988 to current year.
GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 477.10 ft above sea level (levels by U.S. Army Corps of
Engineers). Prior to Jan. 17, 1933, chain gage at site 3.5 mi downstream on railroad bridge at datum 2.00 ft higher. Jan. 17, 1933,
to May 13, 1940, chain gage, and May 14, 1940 to Sept. 30, 1952, wire-weight gage at site 3.6 mi downstream at datum 2.00 ft
higher. Oct. 1, 1952 to Oct. 31, 1956, wire-weight gage, and Nov. 1, 1956 to Sept. 30, 1988, crest-stage gage at site 3.6 mi
downstream at present datum.
REMARKS.--Records good except those for May 8-27 and those for estimated daily discharges, which are poor. U.S. Army Corps of
Engineers satellite telemeter at station.