Bridge Type
Main Span(s): Steel [3] Movable - Bascule [16]
Approach Span(s): Concrete [1] Stringer/Multi-beam or girder [02]
Deck: Open Grating [3] with Wearing Surface:
Bridge Dimensions
Length: 116.6 m = 382.6 ft
Main Spans: 1 at 42.3 m = 138.8 ft
Approach Spans: 4
Skew: 0
Width, Roadway: 10 m = 32.8 ft (2 Lanes) and Out-To-Out: 13.6 m = 44.6 ft for a 8.3 m = 27.2 ft approaching roadway.
Vertical Clearance: 30.45 m = 99.9 ft and Navigational Clearance: 5.7 m = 18.7 ft
Location
Hobe Sound [30975]: Martin County [085], Florida [12]
Owned by County Highway Agency [02], DOT District: 4
0.9 M E OF US-1 ON CR-708
Condition
Deck: Good [7]
Superstructure: Satisfactory [6]
Substructure: Good [7]
Loading
Design: MS 18 / HS 20 [5]
Operating: 56.6 metric ton = 62.3 tons (Load Factor(LF) [1])
Inventory: 33.9 metric ton = 37.3 tons (Load Factor(LF) [1])
Appraisal
Structural: Equal to present minimum criteria [6]
Deck Geometry: Meets minimum tolerable limits to be left in place as is [4]
Road Alignment: Better than present minimum criteria [7]
Waterway: Equal to present desirable criteria [8] and Bridge is scour critical; bridge foundations determined to be unstable. [3]
Inspections
Date: October 1999 [1099] and Frequency: 24
Future Work
Work Needed:
Bridge Detour: 2.6 km = 1.6 mi
Traffic
ADT: 10502 (2020) and Trucks: 2%
Future ADT: 18221 (In 2042
)