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**NOTICE: The New Jersey Water Science Center has transitioned to a new data management software package. While you may not have noticed this transition, some sites may have problems or delays in being updated. We are actively monitoring these conditions and are resolving them as quickly as possible. See the Dec 8 news entry for more information at: https://help.waterdata.usgs.gov/news


ALL DATA ARE AT LOCAL TIME


USGS 01387420 RAMAPO RIVER AT SUFFERN NY

PROVISIONAL DATA SUBJECT TO REVISION

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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.--93.0 mi2.
PERIOD OF RECORD.--June 1979 to current year.
REVISED RECORDS.--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.
REMARKS.--Flow affected by diversion from United Water New York well field upstream from station and by occasional regulation by Lake Sebago. Water Years 2014-16: 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.

Peak Flow and Stage Information

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This station managed by the NY Water Science Center Troy.

Available Parameters Available Period
All 2 Available Parameters for this site
  
00060 Discharge 1983-09-08  2017-07-24
00065 Gage height 2017-03-26  2017-07-24

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


Discharge, cubic feet per second

Most recent instantaneous value: 44.5 07-24-2017   17:15 EST
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Daily discharge, cubic feet per second -- statistics for Jul 24 based on 38 years of record more
Min
(1999)
25th
percen-
tile
Median Most Recent
Instantaneous
Value Jul 24
Mean 75th
percen-
tile
Max
(2004)
7.20 18 41 44.5 49 61 255


Gage height, feet

Most recent instantaneous value: 2.68 07-24-2017   17:15 EST
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