Warning: Javascript must be enabled to use all the features on this page!

Page Loading - Please Wait...

Click to hideNews Bulletins
  • Due to a lapse in appropriations, the majority of USGS websites may not be up to date and may not reflect current conditions. Websites displaying real-time data, such as Earthquake and Water and information needed for public health and safety will be updated with limited support. Additionally, USGS will not be able to respond to inquiries until appropriations are enacted. For more information, please see www.doi.gov/shutdown.

  • Please see news on new formats
  • Full News RSS icon



Click to hidestation-specific text


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 2014-17: 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.

Peak Flow and Stage Information

Gage PhotoStation image


This station managed by the NY Water Science Center Troy.

Available Parameters Available Period
All 2 Available Parameters for this site
00060 Discharge 1990-10-01  2019-01-24
00065 Gage height 2007-10-01  2019-01-24

Graph w/ stats
Graph w/o stats
Graph w/ (up to 3) parms
Days  (7)

  -- or --
Begin date

End date

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

Discharge, cubic feet per second

Most recent instantaneous value: 152 01-24-2019   06:45 EST
Graph of  Discharge, cubic feet per second

Add up to 2 more sites and replot for "Discharge, cubic feet per second"

 Add site numbers

Create presentation-quality / stand-alone graph.   Subscribe to WaterAlert      

Daily discharge, cubic feet per second -- statistics for Jan 24 based on 38 years of record more
Median Most Recent
Value Jan 24
Mean 75th
16.0 80 126 152 197 278 773

Gage height, feet

Most recent instantaneous value: 2.91 01-24-2019   06:45 EST
Graph of  Gage height, feet

Add up to 2 more sites and replot for "Gage height, feet"

 Add site numbers

Create presentation-quality / stand-alone graph.   Subscribe to WaterAlert