LOCATION.--Lat 41°58'01", long 74°26'53" referenced to North American Datum of 1983, Ulster County, NY, Hydrologic Unit 02040104, on right bank 0.3 mi upstream from Tray Mill Brook, and 2.3 mi northeast of Denning.
DRAINAGE AREA.--8.93 mi².
PERIOD OF RECORD.--Occasional discharge measurements, water years 1988-90. October 1990 to March 2013, September 2019 to current year.
GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 2,140.70 ft above NAVD of 1988.
REMARKS.--Water Years 2019-23: Records fair except those for estimated daily discharges, which are poor.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 5,580 ft³/s, Aug. 28, 2011, gage height, 8.75 ft, from rating curve extended above 750 ft³/s on basis of slope-area measurement at gage height 6.96 ft; minimum discharge, 2.0 ft³/s, Aug. 7, 8, 9, 1991; minimum gage height, 0.38 ft, Aug. 26, Sept. 1, 2, 3, 2012.
PERIOD OF DAILY RECORD¹.--SPECIFIC CONDUCTANCE: September 2019 to current year. WATER TEMPERATURE: September 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 DAILY RECORD¹.--SPECIFIC CONDUCTANCE: Maximum, 23 uS/cm at 25 °C, Oct. 26, 2021; minimum, 5 uS/cm at 25 °C, Oct. 31, Nov. 1, 2019, several days in September 2021, and Oct. 4, 5, 2021. WATER TEMPERATURE: Maximum, 17.9 °C, Aug. 8, 2022; minimum, -0.1 °C, on many days.
¹ Water-Quality Records

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