LOCATION.--Lat 42°02'16", long
73°58'19" referenced to North American Datum of 1983,
Ulster County, NY, Hydrologic Unit 02020006, on left bank at
downstream side of bridge on Glasco Turnpike, 0.8 mi east of
Mount Marion, 1.6 mi downstream from Plattekill Creek, and 4.5
mi upstream from mouth.
DRAINAGE AREA.--419 mi².
PERIOD OF RECORD.--Occasional miscellaneous discharge
measurements, 1902, 1951, 1956, 1966, 1967, 1969. April 1907 to
December 1913 (furnished by Board of Water Supply, City of New
York), January 1914 to March 1918 (monthly discharges only,
furnished by Board of Water Supply, City of New York, published
in WSP 1302), March 1970 to current year.
GAGE.--Water-stage recorder and crest-stage gage. Datum
of gage is 40.15 ft above NGVD of 1929 and 39.36 ft above NAVD
of 1988. Prior to Aug. 12, 1970, nonrecording gage at same site
(at different datum April 1907 to March 1918).
REMARKS.--Flow from 256 mi² of drainage area regulated
by Ashokan Reservoir since Sept. 9, 1913. Water diverted from
Schoharie Creek through Shandaken Tunnel (station 01362230)
since Feb. 3, 1924, enters Esopus Creek about 12.2 mi upstream
from Ashokan Reservoir. Diversion from Plattekill Creek for
water supply of village of Saugerties. Slight diversion at
headwaters into Cooper Lake for water supply of Kingston.
Diversions upstream during summer months for irrigation
purposes. Diversions for water supply of city of New York made
from Ashokan Reservoir (station 01363400). Discharge records
for this station now represent the natural flow from 112 mi²,
together with conservation releases and spillage during high
stages from the upstream reservoirs.
Water Years 2014-17: Records good except those for estimated
daily discharges, which are fair. Water Years 2018-20: Records
good except those for estimated daily discharges, which are
poor.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge
observed, 28,000 ft³/s, Apr. 26, 1910, gage height, 25.10 ft,
datum then in use; maximum discharge since March 1970, 30,500
ft³/s, Apr. 3, 2005, gage height, 26.46 ft, outside gage height
was 26.19 ft, from crest-stage gage; minimum discharge, 5.3
ft³/s, Aug. 10, 1999, gage height, 11.51 ft.
PERIOD OF DAILY RECORD1.--SUSPENDED-SEDIMENT
DISCHARGE: November 2013 to current year.
REMARKS1.--Turbidity data are collected every
15 minutes using an in-situ turbidity probe located in a
separate 2 inch pipe about 10 ft upstream of the automatic
sampler intake tubing. Daily suspended-sediment load and
concentration are derived from a regression equation relating
turbidity to suspended-sediment concentration.
EXTREMES FOR PERIOD OF DAILY
RECORD1.--SUSPENDED-SEDIMENT CONCENTRATION:
Maximum daily mean, 439 mg/L, July 16, 2014; minimum daily
mean, 1 mg/L, Feb. 23, 24, 27, 2015.
SUSPENDED-SEDIMENT DISCHARGE: Maximum daily, 6,200 tons, Sept.
30, 2015; minimum daily, 0.23 ton, Sept. 8, 9, 2015.
1 Water-Quality Records
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