LOCATION.--Lat 41°30'31.5", long
74°59'09.8" referenced to North American Datum of
1983, Sullivan County, NY, Hydrologic Unit 02040101, on left
bank 1.6 mi upstream from Lackawaxen River, and 4.6 mi
northwest of Barryville.
DRAINAGE AREA.--2,020 mi².
PERIOD OF RECORD.--October 1940 to current year.
REVISIONS HISTORY.--WDR NY-82-1: Drainage area. WDR
NY-04-1: 2003.
GAGE.--Water-stage recorder and crest-stage gage. Datum
of gage is 600.22 ft above NGVD of 1929 and 599.51 ft above
NAVD of 1988.
REMARKS.--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 of 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.
Water Years 2014-23: Records good except those for estimated
daily discharges, which are poor.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge prior
to current degree of regulation, 130,000 ft³/s, Aug. 19, 1955,
gage height, 26.40 ft, from floodmarks in gage house, from
rating curve extended above 57,000 ft³/s on basis of slope-area
measurement at gage height 23.19 ft; maximum discharge since
current degree of regulation, 151,000 ft³/s, June 28, 2006,
gage height, 28.97 ft, from floodmark in gage house, from
rating curve extended as explained above; minimum discharge,
122 ft³/s, Sept. 5, 1953, gage height, 1.11 ft.
PERIOD OF DAILY RECORD1.--WATER TEMPERATURE:
October 1967 to current year (no winter record for water years
1969-76).
INSTRUMENTATION1.--Water-temperature
satellite and telephone telemeter provides 15-minute-interval
readings. From October 1975 to September 1995,
water-temperature recorder provided one-hour-interval readings.
Prior to October 1975, water-temperature recorder provided
continuous readings.
REMARKS1.--Temperature readings prior to Oct.
1, 2007, rounded to the nearest 0.5 °C.
EXTREMES FOR PERIOD OF DAILY RECORD1.--WATER
TEMPERATURE: Prior to Oct. 1, 2007--Maximum (water years
1968-75, 1980-81, 1983, 1985-96, 1998-2001, 2003-07), 32.5 °C,
July 9, 10, 1993; minimum (water years 1968, 1977-2007), 0.0
°C, on many days during winter periods, each year except water
years 1980-82. WATER TEMPERATURE: After Oct. 1, 2007--Maximum,
33.5 °C, July 27, 29, 2020; minimum (water years 2008,
2010-current), -0.2 °C, on several days during 2022 winter
period.
1 Water-Quality Records