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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
01658000 MATTAWOMAN CREEK NEAR POMONKEY, MD
LOCATION - Lat 38°35'46.1", long 77°03'21.7" referenced to North American Datum of 1983, Charles County, MD, Hydrologic Unit 02070011, on bank at left downstream side of bridge on State Highway 227, 30 ft downstream from Old Womans Run, 1.2 mi southeast of Pomonkey, and 12.6 mi upstream from mouth.
DRAINAGE AREA - 54.8 mi².
REVISIONS HISTORY - WDR MD-DE-DC-02-1. https://waterdata.usgs.gov/nwis/dv/?site_no=01658000: 2018-2019. https://nwis.waterdata.usgs.gov/md/nwis/peak?site_no=01658000: 2018-2019.
SURFACE-WATER RECORDS
PERIOD OF RECORD - November 1949 to September 1972. Annual maximums, water years 1973-86. January 2001 to current year.
GAGE - Water-stage recorder, crest-stage gage and concrete control. Datum of gage is 39.76 ft above North American Vertical Datum of 1988.
REMARKS - Water Year 2022: Records fair, except those for estimated discharges, which are poor.
Water Year 2021: Records fair. No estimated discharges.
Water Year 2020: Records fair, except those for estimated discharges, which are poor.
Water Years 2017-2019: Records good, except those for estimated discharges, which are poor.
Water Years 2015-2016: Records good, except those for estimated daily discharges, which are poor.
Water Year 2014: Records good, except those above 1,000 ft³/s, which are fair, and those for estimated daily discharges, which are poor.
Water Year 2013 and prior years’ accuracy statements can be found in Annual Water Data Reports.
Low flow affected by ground-water diversions from municipal well fields at Waldorf and St. Charles. U.S. Geological Survey satellite data-collection platform at station.
Low flow affected by ground-water diversions from municipal well fields at Waldorf and St. Charles. U.S. Geological Survey satellite data-collection platform at station.
