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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
- For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
- For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
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USGS Water-Year Summary 2024
01414500 MILL BROOK NEAR DUNRAVEN, NY
LOCATION - Lat 42°06'22", long 74°43'50" referenced to North American Datum of 1983, Delaware County, NY, Hydrologic Unit 02040102, on left bank 0.4 mi upstream from bridge on New York City Road 9 and Pepacton Reservoir, and 2.7 mi southwest of Dunraven.
DRAINAGE AREA - 25.2 mi².
REVISIONS HISTORY - WSP 1432: 1937. WDR NY-82-1: Drainage area. WDR NY-84-1: 1979-83.
SURFACE-WATER RECORDS
PERIOD OF RECORD - February 1937 to current year. Published as "at Arena" 1937-67.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 1,298.54 ft Board of Water Supply, City of New York datum and 1,297.18 ft above NAVD of 1988. Prior to Oct. 17, 1939, nonrecording gage at site 0.2 mi downstream at different datum. Oct. 17 to Dec. 8, 1939, nonrecording gage at present site at different datum.
REMARKS - Water Years 2014-23: Records fair except those for estimated daily discharges and those above 1,500 ft³/s, which are poor.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 5,380 ft³/s, Jan. 19, 1996, gage height, 12.56 ft, from rating curve extended above 1,300 ft³/s on basis of flow-through-culvert measurement of peak flow; minimum discharge observed, 1.2 ft³/s, Sept. 25, 26, 1939.
WATER-QUALITY RECORDS
PERIOD OF DAILY RECORD - WATER TEMPERATURE: October 2019 to current year. SPECIFIC CONDUCTANCE: October 2019 to current year.
INSTRUMENTATION - A continuous water-quality monitor with water temperature and specific conductance provides 15-minute-interval readings.
EXTREMES FOR PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: Maximum, 94 uS/cm at 25 °C, Nov. 5, 6, 2019; minimum, 20 uS/cm at 25 °C, Oct. 26, 2021. WATER TEMPERATURE: Maximum, 23.9 °C, Aug. 8, 2022; minimum, -0.1 °C, Feb. 18, 19, 20, 2022, Dec. 24, 2022.
