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    ALL DATA ARE EASTERN STANDARD TIME

    USGS 01417000 EAST BRANCH DELAWARE RIVER AT DOWNSVILLE NY

    PROVISIONAL DATA SUBJECT TO REVISION

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    This station is operated in cooperation with:
       New York City Department of Environmental Protection
       U.S. Geological Survey


    LOCATION.--Lat 42°04'30", long 74°58'35" referenced to North American Datum of 1983, Delaware County, NY, Hydrologic Unit 02040102, on left bank 0.5 mi downstream from Downsville Dam, at downstream end of outlet channel of Pepacton Reservoir, and 1.0 mi east of Downsville.
    DRAINAGE AREA.--372 mi2.
    PERIOD OF RECORD.--July 1941 to current year.
    REVISED RECORDS.--WDR NY-82-1: Drainage area. WDR-US-2006: 2004-05 (M).
    GAGE.--Water-stage recorder and concrete control. Datum of gage is 1,094.92 ft above NGVD of 1929 (levels by Board of Water Supply, City of New York). Prior to Sept. 26, 1941, nonrecording gage, and Sept. 26, 1941 to June 27, 1955, water-stage recorder, at site 0.8 mi downstream at datum 7.03 ft lower.
    REMARKS.--No estimated daily discharges. Records good. Subsequent to September 1954, entire flow from drainage area controlled by Pepacton Reservoir (station 01416900). Part of flow diverted for New York City municipal supply. Remainder of flow (except for conservation releases and spill) impounded for release during periods of low flow in the lower Delaware River basin, as directed by the Delaware River Master. Satellite gage-height telemeter at station.
    EXTREMES FOR PERIOD OF RECORD.--Maximum discharge since construction of Pepacton Reservoir, 20,200 ft3/s, Sept. 18, 2004, gage height, 12.08 ft; minimum discharge, 0.3 ft3/s, Oct. 11, 1954; minimum gage height, 1.39 ft, Jan. 17, 1964.
    EXTREMES OUTSIDE PERIOD OF RECORD.--Flood of Oct. 9, 1903, reached a stage of about 16 ft (at former site and datum).
    EXTREMES FOR PERIOD PRIOR TO REGULATION.--Maximum discharge prior to construction of Pepacton Reservoir, 23,900 ft3/s, Nov. 26, 1950, gage height, 14.52 ft, site and datum then in use;
    Derived from NY Annual Water-Data Report 2013

    Peak Flow and Stage Information

    USGS provisional real-time discharge data can differ from NYCDEP discharge data at flows less than 700 ft3/s as a result of debris or other obstructions affecting the USGS stage-discharge relationship. USGS and NYCDEP data may also differ as a result of accuracy limitations of the stage-discharge rating and the release valve ratings. Release valve changes are recorded at the stream-gaging station after a brief period due to travel time between the two locations.
    More information about provisional data can be found at
    http://waterdata.usgs.gov/nwis/help/?provisional


    Available Parameters Available Period
    All 2 Available Parameters for this site
      
    00060 Discharge 2007-10-01  2014-08-22
    00065 Gage height 2014-04-24  2014-08-22

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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: 155   08-22-2014  05:45 EST
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    Daily discharge, cubic feet per second -- statistics for Aug 22 based on 59 years of record more
    Min
    (1972)
    25th
    percen-
    tile
    Median Most Recent
    Instantaneous
    Value Aug 22
    Mean 75th
    percen-
    tile
    Max
    (2004)
    18 66 89 155 185 187 1170


    Gage height, feet

    Most recent instantaneous value: 3.16   08-22-2014  05:45 EST
    Graph of  Gage height, feet

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