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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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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.--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. Water Years 2014-15: Records good.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, since construction of Pepacton Reservoir in 1954, 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 in 1954, 23,900 ft3/s, Nov. 26, 1950, gage height, 14.52 ft, site and datum then in use.

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  2016-08-28
00065 Gage height 2016-04-30  2016-08-28

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Discharge, cubic feet per second

Most recent instantaneous value: 130   08-28-2016   18:45 EST
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Daily discharge, cubic feet per second -- statistics for Aug 28 based on 61 years of record more
Min
(1968)
25th
percen-
tile
Median Most Recent
Instantaneous
Value Aug 28
Mean 75th
percen-
tile
Max
(2011)
18 65 87 130 217 253 2090


Gage height, feet

Most recent instantaneous value: 3.09   08-28-2016   18:45 EST
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