SURFACE-WATER RECORDS
LOCATION.--Lat 40°35'41", long 75°11'23" referenced to North American Datum of 1983, Pohatcong Township, Warren County, NJ, Hydrologic Unit 02040105, on left bank, upstream side of suspension bridge at Riegelsville, 600 ft upstream from Musconetcong River (flow of which is included in the records for this station since Oct. 1, 1931), and at river mile 174.8.
DRAINAGE AREA.--6,328 mi².
PERIOD OF RECORD.--Continuous-record discharge station, water years 1906-71. Annual maximum gage, water years 1972-2007. Continuous-record gage-height station with annual maximum discharge, water years 2008 to current.
GAGE.--Water-stage recorder with telemetry. Datum of gage is 125.12 ft above NGVD of 1929.
REMARKS.--Annual peak data can be obtained by selecting Peak streamflow from the 'Available data for this site' drop-down menu above or by using this link. Discharges above 160,000 ft³/s from rating curve extension on basis of slope-area computation of peak flow.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 340,000 ft³/s, from rating curve extended above 160,000 ft³/s on basis of slope-area computation of peak flow, Aug 19, 1955, gage height, 38.85 ft.
EXTREMES OUTSIDE PERIOD OF RECORD.--Flood of Oct 10, 1903 reached a gage height of 35.9 ft, discharge 275,000 ft³/s

WATER-QUALITY RECORDS
PERIOD OF RECORD.--Water years 1934, 1943, 1950, 1960-79, 1991 to June 2009.

Peak Flood Chart

National Weather Service flood stage for this gage is 22.0 ft.

Forecasts for this gage are issued by the National Weather Service routinely year-round.
Forecast information is available here.

Rain gage data is available from this location at this link