USGS 01387400 RAMAPO RIVER AT RAMAPO NY

PROVISIONAL DATA SUBJECT TO REVISION

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> Site Information
LOCATION.--Lat 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.
DRAINAGE AREA.--86.9 mi².
PERIOD OF RECORD.--Occasional low-flow and/or miscellaneous discharge measurements, water years 1936, 1952, 1956-58, 1977. June 1979 to current year.
REVISIONS HISTORY.--WDR NY-81-1: 1980 (m). WDR NY-90-1: Drainage area. Discharge for the period Oct. 1, 2016 to Sept. 30, 2017, was revised on June 21, 2018, based on changes to the stage-discharge rating.
GAGE.--Water-stage recorder, crest-stage gage, and concrete control. Datum of gage is 297.00 ft above NGVD of 1929 and 295.78 ft above NAVD of 1988.
REMARKS.--Occasional regulation by Lake Sebago.
Water Years 2014-23: Records fair except those for estimated daily discharges, which are poor.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 13,700 ft³/s, Aug. 28, 2011, gage height, 15.75 ft; minimum discharge, 5.3 ft³/s, Aug. 7, 1983, gage height, 1.27 ft.
EXTREMES OUTSIDE PERIOD OF RECORD.--Maximum discharge, 6,100 ft³/s, Mar. 12, 1936, by computation of flow over dam.
> Rating Information
This station managed by the NY Water Science Center Milford.

Available Parameters Available Period
  
1990-10-01  2024-03-28
2007-10-01  2024-03-28







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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: 460 03-28-2024   15:45 EST
Graph of  Discharge, cubic feet per second

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Daily discharge, cubic feet per second -- statistics for Mar 28 based on 44 water years of record more
Min
(2012)
25th
percen-
tile
Median Mean 75th
percen-
tile
Most Recent
Instantaneous
Value Mar 28
Max
(1993)
46.0 158 199 326 376 460 1690


Gage height, feet

Most recent instantaneous value: 3.58 03-28-2024   15:45 EST
Graph of  Gage height, feet

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