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USGS 01502500 UNADILLA RIVER AT ROCKDALE NY

PROVISIONAL DATA SUBJECT TO REVISION

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LOCATION.--Lat 42°22'40", long 75°24'22" referenced to North American Datum of 1983, Chenango County, NY, Hydrologic Unit 02050101, on right bank 400 ft downstream from Chenango-Otsego County highway bridge at Rockdale, and 0.7 mi downstream from Kent Brook.
DRAINAGE AREA.--520 mi².
PERIOD OF RECORD.--November 1929 to September 1933, January 1937 to March 1995, annual maximum only--1996-2000, October 2000 to current year.
REVISIONS HISTORY.--WDR NY-74-1: 1973 (P). WDR-US-2011: 2006. WDR-US-2014: (period of record minimum).
GAGE.--Water-stage recorder. Datum of gage is 992.25 ft above NGVD of 1929 and 991.91 ft above NAVD of 1988 (VERTCON). Prior to January 1937, nonrecording gage at bridge 400 ft upstream at datum 0.73 ft higher.
REMARKS.--Water Years 2014-17: Records good except those for estimated daily discharges, which are fair. Water Year 2018: Records good except those for estimated daily discharges, which are poor.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 21,100 ft³/s, Sept. 8, 2011, gage height, 14.22 ft; minimum daily discharge, 27 ft³/s, Sept. 20-27, 1964; minimum instantaneous discharge, not determined.

Peak Flow and Stage Information

Gage PhotoStation image

 

This station managed by the NY Water Science Center Ithaca.

Available Parameters Available Period
  
1985-10-02  2019-12-16
2007-10-01  2019-12-16







 (7)
 

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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: 2500 12-16-2019   05:30 EST
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Daily discharge, cubic feet per second -- statistics for Dec 16 based on 80 water years of record more
Min
(1931)
25th
percen-
tile
Median Mean 75th
percen-
tile
Most Recent
Instantaneous
Value Dec 16
Max
(1984)
150 480 717 991 1220 2500 5660


Gage height, feet

Most recent instantaneous value: 6.51 12-16-2019   05:30 EST
Graph of  Gage height, feet

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