Sunday, December 9, 2012

Florida Keys Bridge #49 NAS Boca Chica Overpass MM8

NAS Boca Chica Overpass MM8
December 9, 2012, Rob Hickman, Keith Nelson

December 9, 2012, Keith Nelson, Rob Hickman
Photo by Chester H Kalb II


Structure number: 900129
Location: MM 8.0 NORTH KEY WEST
Purpose: Carries 5-lane highway over two-lane highway
Route classification: Other Principal Arterial (Urban)
Length of largest span: 65.9 ft. [20.1 m]
Total length: 134.8 ft. [41.1 m]
Roadway width between curbs: 106.0 ft. [32.3 m]
Deck width edge-to-edge: 108.9 ft. [33.2 m]
Vertical clearance below bridge: 16.4 ft. [5.0 m]
Owner: State Highway Agency
Year built: 1988
Historic significance: Bridge is not eligible for the National Register of Historic Places
Design load: MS 18 / HS 20
Number of main spans: 3
Main spans material: Prestressed concrete
Main spans design: Stringer/Multi-beam or girder
Deck type: Concrete Cast-in-Place
Wearing surface: Integral Concrete (separate non-modified layer of concrete added to structural deck)

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