LOCATION.-- Lat 40°34'23", long 89°39'17" (NAD of 1927), in SW1/4 sec. 24, T.7 N., R.7 E., Tazewell County, Hydrologic Unit 07130003, at State Highway 9 bridge at Pekin, 5.1 mi upstream from Mackinaw River and at mile 152.9. | |
DRAINAGE AREA.-- 14,585 mi2. | |
PERIOD OF RECORD.-- | |
SURFACE-WATER QUALITY | |
CHEMICAL: Water years 1978-91. | |
SEDIMENT: October 1994 to September 1997. | |
MISCELLANEOUS: Sediment concentration and particle size, water years 1994-97. | |
EXTREMES FOR PERIOD OF RECORD.-- | |
SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily 1,090 mg/L, Feb. 21, 1997; minimum daily 15 mg.L, May 22, 1995. | |
SUSPENDEDD-SEDIMENT LOADS: Maximum daily, 91,500 tons, July 21, 1996; minimum daily 295 tons, Jan. 23, 1997. | |