Warning: Javascript must be enabled to use all the features on this page!

Page Loading - Please Wait...

Click to hideNews Bulletins



Click to hidestation-specific text
Funding for this site is provided by:


> Site Information
LOCATION.--Lat 40°46'01", long 72°59'37" referenced to North American Datum of 1983, Suffolk County, NY, Hydrologic Unit 02030202, on left bank 94 ft downstream from Montauk Highway in East Patchogue, 200 ft downstream from outlet of Swan Lake, and 1.2 mi upstream from mouth.
DRAINAGE AREA.--8.07 mi².
PERIOD OF RECORD.--October 1946 to current year.
REVISIONS HISTORY.--WDR NY-81-2: 1952-77 (M), 1978, 1979-80 (M). WDR-US-2009: Drainage area.
GAGE.--Water-stage recorder and concrete control. Datum of gage is 2.84 ft above NGVD of 1929 and 1.79 ft above NAVD of 1988 (VERTCON).
REMARKS.--Flow regulated at outlet of Swan Lake.
Water Years 2014-20: Records fair except those for estimated daily discharges, which are poor.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 77 ft³/s, Aug. 24, 1990, gage height, 2.71 ft; maximum gage height, about 3.6 ft, Oct. 29, 2012, from high-water mark, result of storm tide; minimum discharge, 0.06 ft³/s, Sept. 2, 1964, gage height, 0.02 ft, result of regulation.
> WaterNow – get the latest gage data from your mobile phone or email.
> Rating Information
This station managed by the NY Water Science Center Coram.

Available Parameters Period of Record
1946-10-01  2021-12-06


  -- or --



Summary of all available data for this site
Instantaneous-data availability statement

Discharge, cubic feet per second

Graph of DAILY Discharge, cubic feet per second

Add up to 2 more sites and replot for "Discharge, cubic feet per second"


Create presentation-quality graph.