LOCATION.-- Lat 40°01'13", long 90°26'12" (NAD of 1927), in NE1/4 sec. 15, T. 18 N., R. 12 W., Cass County, Hydrologic Unit 07130003, at highway bridge on State Street in Beardstown, 9.5 mi downstream from Sangamon River. | |
PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE | |
DISCHARGE: October 1920 to September 1938. | |
GAGE.-- Staff gage. Datum of gage is 419.89 ft above NGVD of 1929. | |
EXTREMES FOR PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge observed, 105,000 ft3/s Oct. 9, 1926; maximum gage height observed, 26.25 ft Oct. 12, 1926; minimum discharge observed, 9,140 ft3/s July 8-14, 1936, gage height, 7.4 feet. | |
EXTREMES OUTSIDE PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge known, about 115,000 ft3/s Apr. 4, 1904. | |