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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
01484525 MILLSBORO POND OUTLET AT MILLSBORO, DE
LOCATION - Lat 38°35'40.4", long 75°17'27.7" referenced to North American Datum of 1983, Sussex County, DE, Hydrologic Unit 02040303, on right bank on upstream side of bridge on State Highway 24, upstream from Millsboro Pond Dam, at Millsboro.
DRAINAGE AREA - 61.7 mi².
REVISIONS HISTORY - https://waterdata.usgs.gov/nwis/dv/?site_no=01484525: 2013.
SURFACE-WATER RECORDS
PERIOD OF RECORD - May 1986 to September 1988, March 1991 to current year.
GAGE - Water-stage recorder, concrete control, and crest-stage gage. Datum of gage is 1.19 ft above North American Vertical Datum of 1988.
REMARKS - Water Years 2021-2023: Records fair, no estimated discharges.
Water Year 2020: Records fair, except those for estimated discharges, which are poor.
Water Years 2018-2019: Records fair, no estimated discharges.
Water Year 2017: Records fair, except those for estimated discharges, which are poor.
Water Year 2016: Records fair, except those for estimated daily discharges, which are poor.
Water Year 2015: Records fair, except those for estimated daily discharges, and those for the period of July 19 - August 20, which are poor.
Water Year 2014: Records fair, no estimated daily discharges.
Water Year 2013 and prior years’ accuracy statements can be found in Annual Water Data Reports.
Natural flow of stream affected by inflow from sand mine de-watering process. Outflow from lake controlled by sluice gates at outlet. Gates were not opened during 2014-2021 water years. U.S. Geological Survey satellite data-collection platform at station.
Natural flow of stream affected by inflow from sand mine de-watering process. Outflow from lake controlled by sluice gates at outlet. Gates were not opened during 2014-2021 water years. U.S. Geological Survey satellite data-collection platform at station.
WATER-QUALITY RECORDS
PERIOD OF DAILY RECORD -
SPECIFIC CONDUCTANCE: October 2006 to March 2008, October 2011 to current year.
WATER TEMPERATURE: October 2006 to March 2008, October 2011 to current year.
pH: October 2006 to March 2008, October 2011 to current year.
DISSOLVED OXYGEN: October 2006 to March 2008, October 2011 to current year.
COOPERATION - Funding for water-quality data collection is provided by the Delaware Department of Natural Resources and Environmental Protection, and the United States Geological Survey.
INSTRUMENTATION - Multi-parameter water-quality monitor, October 2006 to March 2008, October 2011 to current year.
REMARKS - Missing data due to equipment malfunction.
EXTREMES FOR PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: Maximum, 20,400 microsiemens/cm, October 29, 2012; minimum, 61 microsiemens/cm, October 31, 2012.
WATER TEMPERATURE: Maximum, 34.2 °C, July 18, 2012; minimum, 0.1 °C, January 20 and February 14, 2016.
pH: Maximum, 10.3 standard units, April 15, 16, 2012; minimum, 5.9 standard units, November 14, 2020.
DISSOLVED OXYGEN: Maximum, 20.5 mg/L, July 16, 2021; minimum, 0.2 mg/L, September 3, 2012.
WATER TEMPERATURE: Maximum, 34.2 °C, July 18, 2012; minimum, 0.1 °C, January 20 and February 14, 2016.
pH: Maximum, 10.3 standard units, April 15, 16, 2012; minimum, 5.9 standard units, November 14, 2020.
DISSOLVED OXYGEN: Maximum, 20.5 mg/L, July 16, 2021; minimum, 0.2 mg/L, September 3, 2012.
