This station is operated in cooperation
Matamoris PA Emergency Management
National Weather Service
Office of Delaware River Master
U.S. Geological Survey
Lat 41°22'14", long 74°41'51"
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
PERIOD OF RECORD.--
October 1904 to current year.
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.
Water-stage recorder and crest-stage gage. Datum of gage
is 415.35 ft above NGVD of 1929. 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.
Records good except those for estimated daily
discharges, which are poor. Flow regulated by Prompton (station
01428900) and General Edgar Jadwin (station 01429400) reservoirs, Lake
Wallenpaupack (station 01431700), and Toronto (station 01433100), Cliff
Lake (station 01433200), and Swinging Bridge (station 01433000)
reservoirs and smaller reservoirs. Large diurnal fluctuations at medium
and low flows caused by powerplants on tributary streams. Subsequent to
September 1954, entire flow from 371 mi2
of drainage area
controlled by Pepacton Reservoir (station 01416900), and subsequent to
October 1963, entire flow from 454 mi2
of drainage area
controlled by Cannonsville Reservoir (station 01424997). Part of flow
from these reservoirs diverted for New York City municipal supply.
Remainder of flow (except for conservation releases and spill)
impounded for release during periods of low flow in the lower Delaware
River basin, as directed by the Delaware River Master. Satellite and
telephone gage-height telemeter and National Weather Service telephone
gage-height telemeter at station.
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
/s, on basis of slope-area measurement of peak
flow; maximum discharge since current degree of regulation, 189,000
/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
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
/s, by velocity-area studies; maximum gage height, 25.5
ft, Mar. 8, 1904 (ice jam).
PERIOD OF DAILY RECORD1.--
SPECIFIC CONDUCTANCE: January to September 1973 WATER TEMPERATURE:
February 1957 to September 1960, January to September 1973, June 1974
to January 1994, October 1998 to current year. SUSPENDED-SEDIMENT
DISCHARGE: February 1957 to September 1960, March 1970 to June
Thermocouple to data logger;
recorded every 15 minutes.
EXTREMES FOR PERIOD OF DAILY RECORD1.--
WATER TEMPERATURE: 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. 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.
1 Water-Quality Records
Peak Flow and Stage Information