LOCATION.--Lat 41°35'45.4", long
74°28'05.5" referenced to North American Datum of
1983, Sullivan County, NY, Hydrologic Unit 02040104, on left
bank 75 ft downstream from bridge on U.S. Highway 209, 2.0
mi downstream from confluence of South Brook and Primrose
Brook, 0.7 mi upstream from mouth, and 1.6 mi northeast of
Wurtsboro.
DRAINAGE AREA.--10.3 mi².
PERIOD OF RECORD.--December 2019 to current year.
GAGE.--Water-stage recorder and crest-stage gage. Datum
of gage is 563.67 ft above NAVD of 1988.
REMARKS.--Water Years 2020-23: Records fair except those
for estimated daily discharges, which are poor.
EXTREMES FOR PERIOD OF RECORD.--Maximum
discharge, 793 ft³/s, Sept. 1, 2021, gage
height, 8.32 ft, from rating curve extended above 310
ft³/s on basis of runoff comparison with nearby stations;
minimum discharge, 1.13 ft³/s, Aug. 21, 2022, gage height, 4.70
ft; minimum gage height, 4.70 ft, part of every day, Aug. 21,
25-30, 2022.
EXTREMES OUTSIDE PERIOD OF RECORD.--Flood of Aug. 19,
1955 reached a discharge of 2,870 ft³/s, on basis of slope-area
measurement of peak flow 0.4 mi upstream from station.
PERIOD OF DAILY RECORD1.--WATER TEMPERATURE:
December 2019 to current year. SPECIFIC CONDUCTANCE: December
2019 to current year.
INSTRUMENTATION1.--A continuous water-quality
monitor with water temperature and specific
conductance provides 15-minute-interval readings.
EXTREMES FOR PERIOD OF RECORD1.--SPECIFIC
CONDUCTANCE: Maximum, 174 uS/cm at 25°C, June 19, 2020;
minimum, 19 uS/cm at 25°C, Sept. 2, 2021. WATER
TEMPERATURE: Maximum, 22.6 °C, Aug. 6, 2022; minimum, 0.0 °C
on many days during winter periods.
1 Water-Quality Records
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