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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
01647600 POTOMAC RIVER AT WISCONSIN AVE, WASHINGTON, DC
LOCATION - Lat 38°54'12.1", long 77°04'03.6" referenced to North American Datum of 1983, Washington, DC, Hydrologic Unit 02070010, on left bank at upstream end of Georgetown Waterfront Park, 0.60 mi upstream from mouth of Rock Creek, 0.08 mi downstream from Key Bridge, and at river mile 112.5.
DRAINAGE AREA - Not determined.
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 2009 to current year.
GAGE - Water stage recorder. Datum of gage is 0.00 ft above North American Vertical Datum of 1988 (NAVD88). Washington Mean Low Water Datum (WMLW) is +2.26 ft above NAVD88. Prior to October 1, 2013, datum of gage was 0.00 ft above National Geodetic Vertical Datum of 1929 (NGVD29).
REMARKS - Water Years 2022-2024: Records fair.
Water Year 2021: Records good.
Water Years 2019-2020: Records fair.
Water Years 2016-2018: Records good.
Water Year 2015: Records good. Missing data due to equipment malfunction, or due to stage dropping below recordable limit on Feb. 15, 2015.
Water Year 2014: Records good. Missing data due to equipment malfunction.
Water Year 2013 and prior years' accuracy statements can be found in Annual Water Data Reports.
This is a tidal station. Discharge is not determined at this location. U.S. Geological Survey satellite data-collection platform at station.
This is a tidal station. Discharge is not determined at this location. U.S. Geological Survey satellite data-collection platform at station.
EXTREMES OUTSIDE PERIOD OF RECORD - Maximum tidal gage height, 16.31 ft NGVD29 (17.72 ft WMLW), Oct. 17, 1942; Minimum unknown.
EXTREMES FOR PERIOD OF RECORD - Maximum elevation, 9.01 ft NGVD29, March 15, 2010; minimum elevation, unknown (stage dropped below minimum recordable level on Feb. 15, 2015).
