During winter months, cold and ice may
result in inaccurate real-time gage height and streamflow data.
Adjustments or deletions of this data can only be done after detailed
Funding for this site is provided by:
Lat 41°08'28", long 74°06'58"
referenced to North American Datum of 1983, Ramapo Township, Rockland
County, NY, Hydrologic Unit 02030103, on left bank 13 ft upstream from
bridge on U.S. Route 202, 2.5 mi northeast of Suffern, and 4.8 mi
upstream from mouth.
PERIOD OF RECORD.--
Continuous-record gaging station, water years
1959-95, October 2005 to current year. Annual maximum, water years 1996
WDR NY-79-1:1977(P). WDR NY-87-1:1986. WRD
US-2011: 2001(M), 2005(M), 2006(M), 2007(M), 2008(M), 2010(M).
Water-stage recorder with telemetry. Datum of gage is
321.57 ft above NGVD of 1929. Prior to Nov 18, 1976, water-stage
recorder at site on right bank, 13 ft downstream, at present
Records fair, except for estimated discharges, which
are poor. Occasional regulation at low flow due to unknown source.
Pumping from wells upstream of gage may affect flow past gage.
Discharges above 2,200 ft3
/s from rating curve extension on
basis of contracted-opening and flow-over-road computations.
EXTREMES FOR PERIOD OF RECORD.--
Maximum discharge, 3,700
/s, Aug 28, 2011, gage height, 10.66 ft, from rating
curve extended above 2,200 ft3
/s on basis of
contracted-opening and flow-over-road computations; minimum discharge,
/s, Oct 20, 1970, result of temporary pumping from
National Weather Service flood stage for
this gage is 4.0 ft.
Rain gage data is available from this location at this link.