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Estimated flood stage for this gage is 12 feet.
LOCATION. --Lat 40°08'14", long 74°36'00" referenced to North American Datum of 1983, Hamilton Township, Mercer County, NJ, Hydrologic Unit 02040201, on right bank upstream from bridge on Extonville Road, 0.5 mi south of Extonville, 0.5 mi upstream from Pleasant Run, and 0.7 mi downstream from Mercer-Monmouth County line.
DRAINAGE AREA. --81.5 mi2.
PERIOD OF RECORD. --August 1940 to October 1951, October 1952 to current year.
GAGE. --Water-stage recorder, crest-stage gage, and concrete control. Datum of gage is 24.94 ft above NGVD of 1929.
EXTREMES OUTSIDE PERIOD OF RECORD. --Flood of Sep 22, 1938 reached a stage of 13.0 ft, discharge, 4,100 ft3/s (from information from local residents).
COOPERATION. --Funding for this gage is provided by the New Jersey Department of Environmental Protection and the U.S. Geological Survey.
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Value Aug 2