07022000 MISSISSIPPI RIVER AT THEBES, IL
(National stream-quality accounting network station)
LOCATION.--Lat 37°13'00", long 89°27'50", in NW 1/4 sec.17, T.15 S., R.3 W., Alexander County, Hydrologic Unit
07140105, near center span on downstream side of railroad bridge at Thebes, 5.0 mi downstream from Headwater
Diversion Channel, and at mile 43.7 above Ohio River.
DRAINAGE AREA.--713,200 mi2, approximately.
PERIOD OF RECORD.--October 1980 to current year.
PERIOD OF DAILY RECORD.--
SUSPENDED SEDIMENT: October 1980 to current year.
REMARKS.--Sediment records good.
EXTREMES FOR PERIOD OF DAILY RECORD.--
SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily mean, 3,890 mg/L, Dec. 22, 1985; minimum daily mean, 13
mg/L, Jan. 28, 1981.
SUSPENDED-SEDIMENT LOADS: Maximum daily, 6,280,000 tons, Mar. 1, 1985; minimum daily, 2,530 tons, Jan. 28, 1981.
EXTREMES FOR CURRENT YEAR.--
SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily mean, 1,460 mg/L, June 22; minimum daily mean, 120 mg/L, Aug.
30.
SUSPENDED-SEDIMENT LOADS: Maximum daily, 1,800,000 tons, Apr. 6; minimum daily, 39,000 tons, Sept. 16.