Bridge Type
Main Span(s): Steel continuous [4] Arch - Thru [12]
Approach Span(s): Prestressed concrete [5] Mixed types [20]
Deck: Concrete Cast-in-Place [1] with Wearing Surface: Bituminous [6]
Bridge Dimensions
Length: 1862.5 m = 6110.9 ft
Main Spans: 3 at 281 m = 922.0 ft
Approach Spans: 36
Skew: 0
Width, Roadway: 13.2 m = 43.3 ft (3 Lanes) and Out-To-Out: 15.7 m = 51.5 ft for a 14.6 m = 47.9 ft approaching roadway.
Vertical Clearance: 6.3 m = 20.7 ft and Navigational Clearance: 41.1 m = 134.8 ft
Location
Port Huron [65820]: St. Clair County [147], Michigan [26]
Owned by State Highway Agency [01], DOT District: 4
AT PORT HURON
Condition
Deck: Good [7]
Superstructure: Satisfactory [6]
Substructure: Good [7]
Loading
Design:
Operating: 71.8 metric ton = 79.0 tons (Load Factor(LF) [1])
Inventory: 42.7 metric ton = 47.0 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: Superior to present desirable criteria [9] and Bridge foundations (including piles) on dry land well above flood water elevations. [9]
Inspections
Date: October 2020 [1020] and Frequency: 12
Future Work
Work Needed:
Bridge Detour: 0 km = 0.0 mi
Traffic
ADT: 6542 (2016) and Trucks: 36%
Future ADT: 7523 (In 2036
)