PROVISIONAL DATA SUBJECT TO REVISION
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Site Information
LOCATION.--Lat 42°05'46.2", long
74°17'25.5" referenced to North American Datum of
1983, Ulster County, NY, Hydrologic Unit 02020006, on left bank
0.2 mi downstream of Silver Hollow Road bridge, 0.5 mi upstream
from mouth, 0.6 mi southeast of Chichester, and 1.5 mi
northeast of Phoenicia.
DRAINAGE AREA.--8.71 mi².
PERIOD OF RECORD.--May 2012 to current year.
REVISIONS HISTORY.--Discharge for period of Feb. 25, 2017 to Feb. 26, 2017 and Apr. 4, 2017 to Apr. 7, 2017, was revised on Jan. 29, 2019, based on changes to the stage-discharge rating.
GAGE.--Water-stage recorder. Datum of gage is 1,119.95 ft above NAVD of 1988. Prior to Nov. 21, 2016, at location 440 ft downstream at different datum.
REMARKS.--Water Years 2012-17: Records fair except those for estimated daily discharges and those above 200 ft³/s, which are poor. Water Years 2018-20: Records fair except those for estimated daily discharges, which are poor. Water Years 2021-22: Records fair except those for estimated daily discharges and those above 1,000 ft³/s, which are poor. Water Year 2023: Records poor.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 2,900 ft³/s, Dec. 25, 2020, gage height, 8.34 ft, from floodmark, from rating curve extended above 600 ft³/s on basis of contracted-opening, flow-over-road, and flow-through-culvert measurement of peak flow; minimum discharge, 0.36 ft³/s, Sept. 24, 26, 27, 28, 29, 30, 2014, gage height, 1.43 ft; minimum gage height, 0.79 ft, Jan. 15, 2022, result of freezeup.
PERIOD OF DAILY RECORD1.--SUSPENDED-SEDIMENT DISCHARGE: May 2012 to current year.
REMARKS1.--Turbidity data are collected every 15 minutes using an in-situ turbidity probe located a 2-inch diameter galvanized steel pipe extending 10 ft from the left bank. Daily suspended-sediment load and concentration are derived from a regression equation relating turbidity to suspended-sediment concentration.
EXTREMES FOR PERIOD OF RECORD1.--SUSPENDED-SEDIMENT CONCENTRATION: Maximum daily mean, 524 mg/L, Sept. 18, 2012; minimum daily mean, <1 mg/L, on many days in August and September 2014.
SUSPENDED-SEDIMENT DISCHARGE: Maximum daily, 1,120 tons, Sept. 18, 2012; minimum daily, <0.01 tons, on many days in 2013-14.
1 Water-Quality Records
DRAINAGE AREA.--8.71 mi².
PERIOD OF RECORD.--May 2012 to current year.
REVISIONS HISTORY.--Discharge for period of Feb. 25, 2017 to Feb. 26, 2017 and Apr. 4, 2017 to Apr. 7, 2017, was revised on Jan. 29, 2019, based on changes to the stage-discharge rating.
GAGE.--Water-stage recorder. Datum of gage is 1,119.95 ft above NAVD of 1988. Prior to Nov. 21, 2016, at location 440 ft downstream at different datum.
REMARKS.--Water Years 2012-17: Records fair except those for estimated daily discharges and those above 200 ft³/s, which are poor. Water Years 2018-20: Records fair except those for estimated daily discharges, which are poor. Water Years 2021-22: Records fair except those for estimated daily discharges and those above 1,000 ft³/s, which are poor. Water Year 2023: Records poor.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 2,900 ft³/s, Dec. 25, 2020, gage height, 8.34 ft, from floodmark, from rating curve extended above 600 ft³/s on basis of contracted-opening, flow-over-road, and flow-through-culvert measurement of peak flow; minimum discharge, 0.36 ft³/s, Sept. 24, 26, 27, 28, 29, 30, 2014, gage height, 1.43 ft; minimum gage height, 0.79 ft, Jan. 15, 2022, result of freezeup.
PERIOD OF DAILY RECORD1.--SUSPENDED-SEDIMENT DISCHARGE: May 2012 to current year.
REMARKS1.--Turbidity data are collected every 15 minutes using an in-situ turbidity probe located a 2-inch diameter galvanized steel pipe extending 10 ft from the left bank. Daily suspended-sediment load and concentration are derived from a regression equation relating turbidity to suspended-sediment concentration.
EXTREMES FOR PERIOD OF RECORD1.--SUSPENDED-SEDIMENT CONCENTRATION: Maximum daily mean, 524 mg/L, Sept. 18, 2012; minimum daily mean, <1 mg/L, on many days in August and September 2014.
SUSPENDED-SEDIMENT DISCHARGE: Maximum daily, 1,120 tons, Sept. 18, 2012; minimum daily, <0.01 tons, on many days in 2013-14.
1 Water-Quality Records
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