USGS Water-Year Summary 2021
01365100 CANNONSVILLE RESERVOIR DIVERSION CHANNEL NEAR GRAHAMSVILLE, NY
LOCATION - Lat 41°51'07.6", long 74°30'46.9" referenced to North American Datum of 1983, Sullivan County, NY, Hydrologic Unit 02020007, on right bank 400 ft downstream from West Delaware Tunnel Outlet, 6.0 mi upstream from Merriman Dam on Rondout Reservoir.
DRAINAGE AREA - See REMARKS.
PERIOD OF RECORD - December 2018 to current year.
GAGE - Water-stage recorder, acoustic velocity meter, and crest-stage gage. Datum of gage is 833.89 ft above NAVD of 1988.
EXTREMES FOR PERIOD OF RECORD - Maximum daily discharge, 797 ft³/s, Mar. 30, 2019; no flow on many days.
PERIOD OF DAILY RECORD - WATER TEMPERATURE: December 2018 to current year.
INSTRUMENTATION - Water-temperature satellite telemeter provides 15-minute-interval readings.
EXTREMES FOR PERIOD OF DAILY RECORD - WATER TEMPERATURE: Maximum, 22.5 °C, Sept. 22, 23, 2019; minimum, 0.4 °C, Jan. 22, 2019.