USGS Water-Year Summary 2023
01427510 DELAWARE RIVER AT CALLICOON, NY
LOCATION - Lat 41°45'24.3", long 75°03'26.7" referenced to North American Datum of 1983, Wayne County, PA, Hydrologic Unit 02040101, on right bank 0.5 mi downstream from Callicoon Creek, 0.5 mi downstream from Interstate Bridge 7, and 0.8 mi southeast of Callicoon.
DRAINAGE AREA - 1,820 mi².
REVISIONS HISTORY - WDR NY-82-1: Drainage area. WDR NY-86-1: 1975-84 (M). WDR NY-04-1: 2003.
SURFACE-WATER RECORDS
PERIOD OF RECORD - June 1975 to current year.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 734.88 ft above NGVD of 1929 and 734.33 ft above NAVD of 1988.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 144,000 ft³/s, June 28, 2006, gage height, 20.38 ft; minimum discharge, 306 ft³/s, Sept. 24, 25, 1997; minimum gage height, 2.20 ft, Sept. 13, 1977, Aug. 23, 1985.
WATER-QUALITY RECORDS
PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: June 2012 to March 2014, December 2014 to current year.
WATER TEMPERATURE: June 1975 to current year. pH: December 2019 to current year. DISSOLVED OXYGEN: December 2019 to current year. CHLOROPHYLL FLUORESCENCE: December 2019 to current year. PHYCOCYANIN FLUORESCENCE: December 2019 to current year.
INSTRUMENTATION - A continuous water-quality monitor with water temperature, specific conductance, pH, dissolved oxygen, chlorophyll fluorescence, and phycocyanin fluorescence provides 15-minute-interval readings. Prior to May 1989, water-temperature recorder provided one-hour-interval readings.
EXTREMES FOR PERIOD OF DAILY RECORD - WATER TEMPERATURE: Prior to Oct. 1, 2007--Maximum, 30.5°C, July 12, 1987; minimum, 0.0°C, on many days during winter periods. After Oct. 1, 2007--Maximum, 30.4°C, July 7, 2010; minimum, -0.3°C Dec. 2, 2007, Dec. 3, 8, 19, 2019.
SPECIFIC CONDUCTANCE: Maximum, 252 uS/cm @ 25°C, July 5, 6, 2018; minimum, 28 uS/cm @ 25°C, Dec. 19, 2023.
pH: Maximum, 10.0, May 18, 19, 20, 21; minimum, 6.0, July 17, 2021, Apr. 9, 10, 16, 2022.
DISSOLVED OXYGEN: Maximum, 15.2 mg/L, Jan. 31, 2021, Jan. 22, 2022; minimum, 4.7 mg/L July 22, 2020.
CHLOROPHYLL FLUORESCENCE: Maximum, 108 ug/L, 26.9 RFU, May 2, 2020; minimum <0.0 ug/L, 0.0 RFU, on many days. [<, actual value is known to be less than the value shown].
PHYCOCYANIN FLUORESCENCE: Maximum, 28.57 ug/L, 28.66 RFU, Oct. 8, 2020; minimum, <0.0 ug/L, <0.0 RFU, on many days. [<, actual value is known to be less than the value shown].