Bridge Type
Main Span(s): Prestressed concrete [5] Box beam or girders - Multiple [05]
Approach Span(s): Other [00]
Deck: Concrete Precast Panels [2] with Wearing Surface: Bituminous [6]
Bridge Dimensions
Length: 7.8 m = 25.6 ft
Main Spans: 1 at 7.6 m = 24.9 ft
Approach Spans: 0
Skew: 26
Width, Roadway: 19.7 m = 64.6 ft (5 Lanes) and Out-To-Out: 27.7 m = 90.9 ft for a 18.9 m = 62.0 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A
Location
Fort Gratiot [29760]: St. Clair County [147], Michigan [26]
Owned by State Highway Agency [01], DOT District: 4
1.9 MI NW OF PORT HURON
Condition
Deck: Very Good [8]
Superstructure: Fair [5]
Substructure: Fair [5]
Loading
Design: MS 22.5 / HS 25 or greater [9]
Operating: 77.1 metric ton = 84.8 tons (Load Factor (LF) rating reported by rating factor (RF) method using MS18 loading [6])
Inventory: 46.3 metric ton = 50.9 tons (Load Factor (LF) rating reported by rating factor (RF) method using MS18 loading [6])
Appraisal
Structural: Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Deck Geometry: Meets minimum tolerable limits to be left in place as is [4]
Road Alignment: Equal to present desirable criteria [8]
Waterway: Equal to present desirable criteria [8] and Bridge foundations determined to be stable for assessed or calculated scour condition. [5]
Inspections
Date: August 1999 [899] and Frequency: 24
Future Work
Work Needed:
Bridge Detour: 0.5 km = 0.3 mi
Traffic
ADT: 28550 (2018) and Trucks: 3%
Future ADT: 31550 (In 2038
)