I-75 SB over Mackinac Trail

Fair Condition63 years old4,400 vehicles/day

Location

StateMichigan
CountyMackinac
Location4.0 Mi NE Of M-123
CarriesI-75 SB
CrossesMackinac Trail
Coordinates46.01770, -84.71754

Condition Ratings

Overall ConditionFair
Deck6 (Satisfactory)
Superstructure7 (Good)
Substructure7 (Good)
Scour CriticalNot applicable

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length116.5 ft (35.5 m)
Max Span44.6 ft (13.6 m)
Deck Width43.6 ft (13.3 m)
Deck Area472.1 sq m
Main Spans3
Year Built1963

Traffic

Avg Daily Traffic4,400 (2010)
Truck Traffic9%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last Inspection824
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Structure Number000000000005956

Nearby Bridges

I-75 NB over Mackinac Trail 0.0 mi Fair Mackinac Trl Fh41 over Carp River 0.1 mi Good I-75 SB over Carp River 0.5 mi Fair I-75 NB over Carp River 0.5 mi Fair Usfs RTE 3445 over Carp River 1.1 mi Poor Charles Moran RD over I-75 NB 1.5 mi Fair Charles Moran RD over I-75 SB 1.5 mi Good M-134 over I-75 SB 3.2 mi Fair M-134 over I-75 NB 3.2 mi Fair M-134 over Pine River 4.0 mi Fair