Funding for this site is provided by:
41°08'25", long 74°10'07" referenced to North
American Datum of 1983, Rockland County, NY, Hydrologic Unit 02030103,
on right bank, 105 ft downstream from highway bridge on New York State
Thruway at Ramapo, 500 ft upstream from local bridge, and 0.3 mi
upstream from Torne Brook.
PERIOD OF RECORD.--
Occasional low-flow and/or miscellaneous
discharge measurements, water years 1936, 1952, 1956-58, 1977. June
1979 to current year.
WDR NY-81-1: 1980 (m). WDR NY-90-1: Drainage
Water-stage recorder, crest-stage gage, and concrete
control. Datum of gage is 297.00 ft above NGVD of 1929.
Occasional regulation by Lake Sebago. Water Years
2014-16: Records fair except those for estimated daily discharges,
which are poor.
EXTREMES FOR PERIOD OF RECORD.--
Maximum discharge, 13,700
/s, Aug. 28, 2011, gage height, 15.75 ft; minimum
discharge, 5.3 ft3
/s, Aug. 7, 1983, gage height, 1.27
EXTREMES OUTSIDE PERIOD OF RECORD.--
Maximum discharge, 6,100
/s, Mar. 12, 1936, by computation of flow over dam.
Peak Flow and Stage Information