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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  2014-10-24
00065 Gage height 2014-06-26  2014-10-24

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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: 98   10-24-2014  12:45 EST
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Daily discharge, cubic feet per second -- statistics for Oct 24 based on 59 years of record more
Min
(1955)
25th
percen-
tile
Median Most Recent
Instantaneous
Value Oct 24
Mean 75th
percen-
tile
Max
(1970)
6.4 38 66 98 172 185 725


Gage height, feet

Most recent instantaneous value: 3.01   10-24-2014  12:45 EST
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