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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.
- For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
- Not all sites have reports available for every water year.
USGS Water-Year Summary 2024
01478000 CHRISTINA RIVER AT COOCHS BRIDGE, DE
LOCATION - Lat 39°38'14.6", long 75°43'40.4" referenced to North American Datum of 1983, New Castle County, DE, Hydrologic Unit 02040205, on right bank 60 ft downstream from highway bridge, 0.5 mi southeast of Coochs Bridge, 3.3 mi south of Newark, 3.6 mi upstream from Belltown Run, and 22.6 mi upstream from mouth.
DRAINAGE AREA - 20.5 mi².
REVISIONS HISTORY - WDR MD-DE-79-1: 1943-70(P). WDR MD-DE-87-1: 1980-82(P).
SURFACE-WATER RECORDS
PERIOD OF RECORD - April 1943 to current year.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 24.43 ft above North American Vertical Datum of 1988 and 25.54 ft above National Geodetic Vertical Datum of 1929. Prior to September 14, 1944, nonrecording gage on upstream side of bridge at same gage datum. September 14, 1944 to May 13, 1969, recording gage at site on left bank at downstream side of highway bridge at same gage datum. May 26, 1969 to December 5, 1973, recording gage on left bank 82 ft. downstream from highway bridge at same gage datum.
REMARKS - Water Years 2022-2023: Records good, except those with estimated discharges, which are poor.
Water Years 2020-2021: Records good.
Water Years 2017-2019: Records good, except those with estimated discharges, which are poor.
Water Year 2016: Records fair, except those with estimated daily discharges, which are poor.
Water Years 2014-2015: Records good, except those with estimated daily discharges, which are poor.
Water Year 2013 and prior years' accuracy statements can be found in Annual Water Data Reports.
Low and medium flow regulated by mill upstream from station. U.S. Geological Survey satellite data-collection platform at station.
WATER-QUALITY RECORDS
PERIOD OF DAILY RECORD - WATER TEMPERATURE: October 2018 to current year. SPECIFIC CONDUCTANCE: July 2021 to current year.
COOPERATION - Funding for water-quality collection is provided by the United States Geological Survey.
INSTRUMENTATION - Single parameter water-quality monitor: October 2018 to July 2021. Multi-parameter water-quality monitor: July 2021 to current year.
REMARKS - Missing data due to equipment malfunction.
EXTREMES FOR PERIOD OF RECORD -
TEMPERATURE: Minimum: -0.02 °C, multiple days throughout period of record the first on January 22, 2024; Maximum: 28.3°C on August 8, 2022, multiple occurrences recorded. Temperatures may have been higher during period of equipment malfunction.
SPECIFIC CONDUCTANCE: Minimum: 47 µS/cm on December 28, 2023; Maximum: 2,140 µS/cm on multiple occurrences the first on January 20, 2024. Maximum is a result of road salt runoff.
