LOCATION.--Lat 41°07'06", long
74°09'37" referenced to North American Datum of 1983,
Rockland County, NY, Hydrologic Unit 02030103, on left bank 145
ft downstream from highway bridge on New York State Thruway at
Suffern, and 1.1 mi upstream from Mahwah River.
DRAINAGE AREA.--93 mi².
PERIOD OF RECORD.--June 1979 to current year.
REVISIONS HISTORY.--WDR NY-00-1: 1999 (M).
GAGE.--Water-stage recorder, crest-stage gage, and
concrete control. Datum of gage is 264.44 ft above NGVD of 1929
and 263.29 ft above NAVD of 1988.
REMARKS.--Flow affected by diversion from United Water
New York well field upstream from station and by occasional
regulation by Lake Sebago.
Water Years 2014-21: Records fair except those for estimated
daily discharges, which are poor.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge,
14,700 ft³/s, Aug. 28, 2011, gage height, 18.88 ft, on basis of
runoff comparisons with nearby stations; minimum discharge, 1.7
ft³/s, Sept. 7, 1995, gage height, 1.04 ft.
EXTREMES OUTSIDE PERIOD OF RECORD.--Maximum discharge,
6,600 ft³/s, Mar. 12, 1936, by computation of flow over dam at
site 0.65 mi upstream, drainage area, 90.6 mi².