Historical Marker Search

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Page 5 of 15 — Showing results 41 to 50 of 141
historicalmarkerproject/markers/HM25A6_switching-yard_Washington-DC.html
Switching Yard Almost 100 years ago, the tracks of the busy Pennsylvania Railroad freight yard known as the "Navy Yard" occupied the area around 4th and M Streets, serving the US Navy Shipyard Annex. Two or three yard engines switched freight…
historicalmarkerproject/markers/HM25A5_arch-bridge_Washington-DC.html
Arch Bridge One of the strongest bridge types, the arch bridge was used extensively by the Romans. The arch carries the weight of the roadway and vehicular traffic to supports at each end. Bayonne Bridge, Library of Congress, HAER, NJ, 9-B…
historicalmarkerproject/markers/HM25A4_cable-stayed-bridge_Washington-DC.html
Cable Stayed Bridge The cables connect structure supporting the roadway and traffic to the tower, stiffening or staying the bridge and enabling the tower to carry the required load. Bob Graham Sunshine Skyway Bridge. ©FIGG Engineering Gr…
historicalmarkerproject/markers/HM25A0_1977_Washington-DC.html
His 70 pound Gossamer Condor, powered by cyclist Bryan Allen maneuvers a figure eight on a closed course and stays aloft for 7 minutes, 2.7 seconds, winning the $95,000 Kremer Prize.
historicalmarkerproject/markers/HM24T4_taxiway-guidance-sign-crossing-gate-and-flashing-light-signal-channel-marking-buoy_Washington-DC.html
Taxiway Guidance Sign The colors, letters and design of standardized airport signs on taxiways and runways provide specific instructions to pilots. Runway sign of Los Angeles International Airport, November 2004. Sam Chui. Gift of Standard Si…
historicalmarkerproject/markers/HM24QH_1891_Washington-DC.html
Many inventors apply their skills to horseless carriages. John Lamberi produces America's first gasoline powered car. [Unreadable]
historicalmarkerproject/markers/HM24QG_1898_Washington-DC.html
Holland launches the first practical submarine. Purchased by the Navy in 1900 as the USS Holland (SS-1), it uses a gasoline engine on the surface and is battery-powered under water.
historicalmarkerproject/markers/HM24QF_1901_Washington-DC.html
Oscar Hedstrom designs the first American-made motorcycle the Indian for the Hendee Manufacturing Co. Follow the transportation exhibition surrounding the Department of Transportation Headquarters
historicalmarkerproject/markers/HM24QE_1903_Washington-DC.html
Wilbur becomes interested in mechanical flight in 1896. After experimenting with gliders, he and Orville develop and patent principles of airplane control that are still used today.
historicalmarkerproject/markers/HM24QD_1903_Washington-DC.html
Orville Wright pilots the first powered flight, lasting 12 seconds. The heavier-than-air plane takes off from the ground, flies 120 feet, and reaches an altitude of 10 feet. He and his brother Wilbur each make two flights that day.
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