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USGS Water-Year Summary 2024
01438500 DELAWARE RIVER AT MONTAGUE, NJ
LOCATION - Lat 41°18'33", long 74°47'43" referenced to North American Datum of 1983, Dingman Township, Pike County, PA, Hydrologic Unit 02040104, on right bank 1,500 ft upstream from toll bridge (on U.S. Route 206) between Montague, NJ and Milford, PA, 0.8 mi downstream from Sawkill Creek, and at river mile 246.3.
DRAINAGE AREA - 3,480 mi².
REVISIONS HISTORY - WDR NJ-81-2: 1980.
SURFACE-WATER RECORDS
PERIOD OF RECORD - March 1936 to September 1939 (gage heights only, published as "at Milford, PA"). October 1939 to current year.
GAGE - Water-stage recorder with telemetry. Datum of gage is 369.20 ft above NAVD of 1988. Prior to Feb 9, 1940, non-recording gage on upstream side of left span of subsequently dismantled bridge at present site at datum 70 ft lower.
REMARKS - Records good, except for estimated discharges, which are fair. Diurnal fluctuation at medium and low flow caused by hydroelectric plants on tributary streams. Flow regulated by Lake Wallenpaupack, Cliff Lake, and by Pepacton, Cannonsville, Swinging Bridge, Toronto, and Neversink Reservoirs. Discharges above 105,000 ft³/s from rating curve extension on basis of flood-routing study.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of Oct 10, 1903 reached a stage of 31.1 ft (from high-water mark), discharge, 217,000 ft³/s.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 250,000 ft³/s, from rating curve extended above 105,000 ft³/s on basis of flood-routing study, Aug 19, 1955, gage height, 35.15 ft; minimum discharge, 382 ft³/s, Aug 24, 1954.
WATER-QUALITY RECORDS
PERIOD OF RECORD - Water years 1956-73, 1976-78, 1991 to August 2009.
