USGS Water-Year Summary 2024
01434000 DELAWARE RIVER AT PORT JERVIS, NY
LOCATION - Lat 41°22'14.1", long 74°41'49.7" referenced to North American Datum of 1983, Pike County, PA, Hydrologic Unit 02040104, on right bank 250 ft downstream from bridge on U.S. Highways 6 and 209 between Port Jervis, NY and Matamoras, PA, 1.2 mi upstream from Neversink River, and 6.5 mi downstream from Mongaup River.
DRAINAGE AREA - 3,076 mi².
REVISIONS HISTORY - WSP 1031: 1905-36. WDR NY-71-1: 1970. WDR NY-82-1: Drainage area. WDR NY-86-1: 1979-80. WDR NY-04-1: 2003.
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1904 to current year.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 415.35 ft above NGVD of 1929 and 414.78 ft above NAVD of 1988. Prior to Aug. 14, 1928, nonrecording gage at bridge 250 ft upstream at same datum; operated by U.S. Weather Service prior to June 20, 1914.
EXTREMES OUTSIDE PERIOD OF RECORD - The U.S. Weather Bureau reported a discharge of 205,000 ft³/s, Oct. 10, 1903, gage height, 23.1 ft, from rating curve extended above 70,000 ft³/s, by velocity-area studies; maximum gage height, 25.5 ft, Mar. 8, 1904 (ice jam).
EXTREMES FOR PERIOD OF RECORD - Maximum discharge prior to current degree of regulation, 233,000 ft³/s, Aug. 19, 1955, gage height, 23.91 ft, from floodmarks in gage house, outside gage height was 24.16 ft, from floodmark, from rating curve extended above 130,000 ft³/s, on basis of slope-area measurement of peak flow; maximum discharge since current degree of regulation, 189,000 ft³/s, June 28, 2006, gage height, 21.47 ft, outside gage height was 22.16 ft, from crest-stage gage; maximum gage height, 26.6 ft, Feb. 12, 1981 (ice jam), from floodmarks; minimum observed discharge, 175 ft³/s, Sept. 23, 1908, gage height, 0.6 ft.
WATER-QUALITY RECORDS
PERIOD OF DAILY RECORD -
SPECIFIC CONDUCTANCE: January to September 1973, June 2019 to current year.
WATER TEMPERATURE: February 1957 to September 1960, January to September 1973, June 1974 to January 1994, October 1998 to August 2001, June 2019 to current year.
SUSPENDED-SEDIMENT DISCHARGE: February 1957 to September 1960, March 1970 to June 1976.
EXTREMES FOR PERIOD OF DAILY RECORD -
WATER TEMPERATURE: Prior to Oct. 1, 2007--Maximum (water years 1957-59, 1973-81, 1983-84, 1988-93, 1999-2000), 30.5°C, July 5, 1999; minimum (water years 1958-60, 1973, 1975-93, 1999), 0.0°C on many days during winter periods, except 1984. WATER TEMPERATURE: After Oct. 1, 2007--Maximum, 29.0 °C, June 30, 2021; minimum, -0.1 °C on many days during winter period in 2020-22 water years.
SPECIFIC CONDUCTANCE: Maximum, 120 uS/cm at 25 °C, July 5, 2020; minimum, 27 uS/cm at 25 °C, June 30, July 1, 1973.
SUSPENDED-SEDIMENT CONCENTRATION (water years 1957-60, 1970-76): Maximum daily mean, 760 mg/L, June 29, 1973; minimum daily mean, less than 1 mg/L on many days.
SUSPENDED-SEDIMENT DISCHARGE (water years 1957-60, 1970-76): Maximum daily, 187,000 tons, June 29, 1973; minimum daily, 1 ton, Aug. 29, 1957.