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Data Release        April 23, 2019        30 year (1981 - 2010) annual average of daily intensity of precipitation for a rain event for the Conterminous United States and District of Columbia

Data Release        April 23, 2019        30 year (1981 - 2010) annual average number of occurrences of dry and wet events for the Conterminous United States and District of Columbia

Data Release        April 23, 2019        30 year (1981 - 2010) annual average duration of consecutive dry and wet days for the Conterminous United States and District of Columbia

Data Release        October 16, 2023        Inventory of water bottling facilities in the United States, 2023, and select water-use data, 1955-2022

publication        January 1, 1998        Water quality in the Potomac River basin, Maryland, Pennsylvania, Virginia, West Virginia, and the District of Columbia, 1992-96

publication        January 1, 1986        Data on the distribution and abundance of submersed aquatic vegetation in the tidal Potomac River, Maryland, Virginia, and the District of Columbia, 1985

publication        January 1, 1994        Stratigraphic notes, 1992: Four short papers propose changes in stratigraphic nomenclature in Vermont, Virginia, Maryland, and the District of Columbia

publication        January 1, 1947        [Book review] Preliminary List of the Birds of Maryland and the District of Columbia, compiled and annotated by Irving E. Hampe and Haven Kolb

Photography        April 11, 2014        Accokeek Creek Panorama

publication        January 1, 1994        Geologic map of the Washington West quadrangle, District of Columbia, Montgomery and Prince Georges counties, Maryland, and Arlington and Fairfax counties, Virginia

Photography        April 11, 2014        Osprey Nest

Data Release        April 23, 2019        30 year (1981-2010) average of annual maximum duration of consecutive dry and wet days per event for the Conterminous United States and District of Columbia

publication        January 1, 1916        Triangulation and primary traverse, 1913-1915; R.B. Marshall, Chief Geographer. Primary traverse in Maryland and the District of Columbia, 1913-1915

Photography        April 11, 2014        Driftwood along the Potomac

Photography        April 11, 2014        Driftwood along the Potomac

Photography        April 11, 2014        Creek and River

Photography        April 11, 2014        River and Creek

publication        January 1, 1999        Distribution and abundance of submersed aquatic vegetation in the tidal Potomac River and upper Potomac Estuary, Maryland, Virginia, and the District of Columbia, 1993-1998

Photography        April 11, 2014        Mouth of Accokeek Creek

Photography        April 11, 2014        Osprey

publication        January 1, 1988        Data on the distribution and abundance of submersed aquatic vegetation in the tidal Potomac River and transition zone of the Potomac Estuary, Maryland, Virginia, and the District of Columbia, 1988

Photography        April 11, 2014        Osprey Nest

publication        January 1, 1982        Submersed aquatic vegetation in the tidal Potomac River and Estuary of Maryland, Virginia and the District of Columbia; Hydrologic data report, May, 1978 to November, 1981

publication        January 1, 1997        Flood-hydrology data for the Potomac River and selected tributaries in the vicinity of the Chesapeake and Ohio Canal National Historical Park, Maryland, West Virginia, and the District of Columbia

publication        January 1, 1985        Data on the distribution and abundance of submersed aquatic vegetation in the tidal Potomac River and transition zone of the Potomac Estuary, Maryland, Virginia, and the District of Columbia, 1983-1984

publication        January 1, 1978        Summary appraisals of the nation's ground-water resources – Mid-Atlantic region

publication        January 1, 1997        The seven-story river; geomorphology of the Potomac River Channel between Blockhouse Point, Maryland, and Georgetown, District of Columbia, with emphasis on the gorge complex below Great Falls

Photography        October 18, 2014        Banks of the Boundary Channel of the Potomac River

Photography        October 18, 2014        A Panorama of the Boundary Channel of the Potomac River

Photography        April 11, 2014        Tree Stump along the Potomac River

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