LOCATION.--Lat 41°59'45.9", long
74°30'00.8" referenced to North American Datum of
1983, Ulster County, NY, Hydrologic Unit 02040104, on right
bank 0.3 mi upstream from Pigeon Brook, 0.7 mi upstream from
mouth, and 0.8 mi northeast of Frost Valley.
DRAINAGE AREA.--3.72 mi².
PERIOD OF RECORD.--Occasional discharge measurements,
water year 1983. June 1983 to current year.
REVISIONS HISTORY.--WDR NY-91-1: Drainage area. WDR
NY-94-1: 1984(P), 1985(M), 1987(P), 1989(P),
1993(P). Datum of gage was revised on Oct. 3, 2022, from
2,082.53 ft above NAVD of 1988 to 2,057.25 ft above NAVD of
1988 based on an updated geodetic survey.
GAGE.--Water-stage recorder and crest-stage gage. Datum
of gage is 2,057.25 ft above NAVD of 1988. Prior to Sept. 11,
1987, at datum 6.00 ft higher. Sept. 11, 1987 to Sept. 5, 2011,
at datum 5.00 ft higher.
REMARKS.--Water Years 2014-24: Records fair except those
for estimated daily discharges, which are poor.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, about
1,500 ft³/s, Aug. 28, 2011, gage height, 11.37 ft, present
datum, from crest-stage gage, from rating curve extended above
390 ft³/s on basis of runoff comparisons with nearby stations;
minimum discharge, 0.24 ft³/s, Sept. 2, 3, 1991, gage height,
5.75 ft, present datum; minimum gage height, 2.20 ft, Aug. 9,
10, Sept. 2, 3, 2012.
PERIOD OF DAILY RECORD1.--WATER
TEMPERATURE: September 2018 to current year. SPECIFIC
CONDUCTANCE: January 2020 to current year.
INSTRUMENTATION1.--A continuous water-quality
monitor with water temperature and specific conductance
provides 15-minute-interval readings.
EXTREMES FOR PERIOD OF DAILY
RECORD1.--SPECIFIC CONDUCTANCE: Maximum, 17
uS/cm at 25 °C, on many days; minimum, 8 uS/cm at 25 °C,
Feb. 29, Mar. 1, 2020. WATER TEMPERATURE: Maximum, 18.6
°C, Aug. 8, 2022; minimum, -0.1 °C on many days during
winter periods.
1 Water-Quality Records