USGS Water-Year Summary 2021
03378000 BONPAS CREEK AT BROWNS, IL
LOCATION - Lat 38°23'11", long 87°58'32" referenced to North American Datum of 1927, in NW 1/4 SE 1/4 sec.33, T.1 S., R.14 W., Edwards County, IL, Hydrologic Unit 05120113, on right bank at downstream side of bridge on State Highway 15, 0.5 mi north of Browns, 0.7 mi upstream from railroad bridge, and at mile 14.6.
DRAINAGE AREA - 228 mi².
PERIOD OF RECORD -
SURFACE-WATER DISCHARGE AND STAGE
DISCHARGE: December 1916 to January 1917 and October 1940 to current.
STAGE: Water years 1994 to current.
CHEMICAL: Water years 1978-91.
MISCELLANEOUS: Water years 1998 and 2002.
GAGE - Water-stage recorder, satellite telemeter, and crest-stage gage. Datum of
gage is 372.92 ft above NGVD of 1929 (372.50 ft NAVD 1988). Prior to Dec. 11, 1968, water-stage recorder and concrete dam at site 0.4 mi downstream at datum 2.0 ft higher. Dec. 11, 1968, to Aug. 13, 1969, nonrecording gage at site 0.5 mi downstream at datum 1.0 ft lower. Prior to Oct. 1, 1982, auxiliary nonrecording gage near mouth on Wabash River at Grayville read twice daily.
EXTREMES FOR PERIOD OF RECORD - SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 7,500 ft³/s, May 9, 1961, gage height, 24.04 ft, site and datum then in use; no flow at times in most years.