USGS Water-Year Summary 2018
01305000 CARMANS RIVER AT YAPHANK, NY
LOCATION - Lat 40°49'49", long 72°54'22" referenced to North American Datum of 1983, Suffolk County, NY, Hydrologic Unit 02030202, on left bank 50 ft upstream from Long Island Railroad bridge, 0.6 mi northeast of Yaphank Station, and 0.7 mi southeast of Yaphank.
DRAINAGE AREA - 73.1 mi².
PERIOD OF RECORD - June 1942 to current year.
REVISED RECORDS - WDR-US-2009: Drainage area.
GAGE - Water-stage recorder and concrete control. Datum of gage is 17.95 ft above NGVD of 1929. Prior to Feb. 2, 1967, at datum 1.00 ft higher.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 165 ft³/s, Oct. 15, 2005, gage height, 2.19 ft; minimum discharge, 2.8 ft³/s, Feb. 24, 1967, gage height, 0.73 ft, result of temporary construction upstream.