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New Harvard Street Bridge, Spans Rock Creek & Beach Drive at National Zoo, Washington, District of Columbia, DC
View From Above, Looking East (old Harvard Street Bridge In Background)
Underside View East, Showing Piers And Pour Sections
Detail Of Built-in Road And Sidewalk Security Gate At Entrance To Zoo
Photo Caption Pages
Spans Rock Creek & Beach Drive at National Zoo, Washington, DC
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Documentation compiled after 1968.
Survey number HAER DC-53
Unprocessed field note material exists for this structure (N267).
Building/structure dates: 1965 initial construction
Significance: The New Harvard Street Bridge is one of the few bridges of its type in the world; the structure is a concrete box girder with a trapezoidal section, the sides angling in and down. The concrete was poured segmentally and locked together with steel reinforcing and keys.
Concrete Girder Bridges
Bureau Of Public Roads
Pierce, Elaine, Delineator
Historic American Engineering Record (Library of Congress)
1. VIEW FROM ABOVE, LOOKING EAST (OLD HARVARD STREET BRIDGE IN BACKGROUND)
2. UNDERSIDE VIEW EAST, SHOWING PIERS AND POUR SECTIONS
4. DETAIL OF BUILT-IN ROAD AND SIDEWALK SECURITY GATE AT ENTRANCE TO ZOO
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