Location of Gage :
On upstream side of Highway 133 bridge at Chesterville and at mile 254.0 (previously 287.6) above the mouth of the Kaskaskia River. note: new river mileage determined after 1962-86 channel improvements.
This gage is owned and operated by the St. Louis District, Corps of Engineers. Maintained in conjunction with the U.S. Geological Survey.