PROVISIONAL DATA SUBJECT TO REVISION
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LOCATION.--Lat 43°27'50.5", long
73°17'04.2" referenced to North American Datum of
1983, Washington County, NY, Hydrologic Unit 04150401, on right
bank 110 ft downstream from bridge on County Highway 21, and
2.2 mi north of Middle Granville.
DRAINAGE AREA.--167 mi².
PERIOD OF RECORD.--March 1990 to current year.
REVISIONS HISTORY.--WDR NY-97-1: 1993, 1994(P), 1996.
GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 315.35 ft above NAVD of 1988.
REMARKS.--Water Years 2014-23: Records good except those for estimated daily discharges, which are poor.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 16,800 ft³/s, Aug. 28, 2011, gage height, 15.04 ft; minimum discharge, 6.8 ft³/s, Sept. 11, 2002; minimum gage height, 2.81 ft, Sept. 7, 1995, Sept. 11, 2002.
EXTREMES OUTSIDE PERIOD OF RECORD.--Flood of Mar. 14, 1977, reached a discharge of about 14,500 ft³/s, on basis of runoff comparison of peak flow from contracted-opening measurement at Grays Corners near Whitehall (drainage area 200 mi²). Flood of May 31, 1984, reached a discharge of about 5,400 ft³/s, on basis of slope-area measurement of peak flow 2.8 mi upstream at Middle Granville (drainage area 156 mi²).
DRAINAGE AREA.--167 mi².
PERIOD OF RECORD.--March 1990 to current year.
REVISIONS HISTORY.--WDR NY-97-1: 1993, 1994(P), 1996.
GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 315.35 ft above NAVD of 1988.
REMARKS.--Water Years 2014-23: Records good except those for estimated daily discharges, which are poor.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 16,800 ft³/s, Aug. 28, 2011, gage height, 15.04 ft; minimum discharge, 6.8 ft³/s, Sept. 11, 2002; minimum gage height, 2.81 ft, Sept. 7, 1995, Sept. 11, 2002.
EXTREMES OUTSIDE PERIOD OF RECORD.--Flood of Mar. 14, 1977, reached a discharge of about 14,500 ft³/s, on basis of runoff comparison of peak flow from contracted-opening measurement at Grays Corners near Whitehall (drainage area 200 mi²). Flood of May 31, 1984, reached a discharge of about 5,400 ft³/s, on basis of slope-area measurement of peak flow 2.8 mi upstream at Middle Granville (drainage area 156 mi²).
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