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aerial photographs

aerial view

conowingo dam

dam

maryland

us national archives

bridge

conowingo

public
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Aerial photographs - Maryland - Conowingo Dam

Aerial photographs - Maryland - Conowingo Dam

Maryland - Conowingo Dam Public domain photograph - aerial photo, work of US government, free to use, no copyright restrictions image - Picryl description

Aerial photographs - Maryland - Conowingo Dam

Aerial photographs - Maryland - Conowingo Dam

Maryland - Conowingo Dam Public domain photograph - aerial photo, work of US government, free to use, no copyright restrictions image - Picryl description

Aerial photographs - Maryland - Conowingo Dam

Aerial photographs - Maryland - Conowingo Dam

Maryland - Conowingo Dam Public domain photograph - aerial photo, work of US government, free to use, no copyright restrictions image - Picryl description

Aerial photographs - Maryland - Conowingo Dam

Aerial photographs - Maryland - Conowingo Dam

Maryland - Conowingo Dam Public domain photograph - aerial photo, work of US government, free to use, no copyright restrictions image - Picryl description

Batteries for Entrenchment on south side and Batteries on north side, Conowingo Bridge, Susquehannah [sic] River; Md. [Panel of plans and sections.]

Batteries for Entrenchment on south side and Batteries on north side, ...

"Fortifications Map File" Plans of Military Forts Public domain scan of architectural plan, map, free to use, no copyright restrictions image - Picryl description

Sketch showing Proposed defences of Harrisburg, Pa., and Conowingo Bridge, Md

Sketch showing Proposed defences of Harrisburg, Pa., and Conowingo Bri...

"Fortifications Map File" Plans of Military Forts

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The objects in this collection are from The U.S. National Archives and Defense Visual Information Distribution Service. The U.S. National Archives and Records Administration (NARA) was established in 1934 by President Franklin Roosevelt. NARA keeps those Federal records that are judged to have continuing value—about 2 to 5 percent of those generated in any given year. There are approximately 10 billion pages of textual records; 12 million maps, charts, and architectural and engineering drawings; 25 million still photographs and graphics; 24 million aerial photographs; 300,000 reels of motion picture film; 400,000 video and sound recordings; and 133 terabytes of electronic data. The Defense Visual Information Distribution Service provides a connection between world media and the American military personnel serving at home and abroad. All of these materials are preserved because they are important to the workings of Government, have long-term research worth, or provide information of value to citizens.

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