I-75 N Appr over Straits Of Mackinac

Fair Condition84 years old11,076 vehicles/day

Location

StateMichigan
CountyEmmet
LocationN Of Mackinac Br (causway
CarriesI-75 N Appr
CrossesStraits Of Mackinac
Coordinates45.84573, -84.72347

Condition Ratings

Overall ConditionFair
Deck7 (Good)
Superstructure7 (Good)
Substructure6 (Satisfactory)
Channel/Waterway8 (Very Good)
Scour Critical8 — Stable, low risk

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length89.9 ft (27.4 m)
Max Span29.9 ft (9.1 m)
Deck Width59.4 ft (18.1 m)
Deck Area495.9 sq m
Main Spans3
Year Built1942 (reconstructed 1985)

Traffic

Avg Daily Traffic11,076 (2007)
Truck Traffic7%
Lanes On Bridge4

Inspection & Ownership

Last Inspection724
Inspection FrequencyEvery 12 months
OwnerState Toll Authority
Historical SignificanceBridge is on the National Register of Historic Places
Structure Number000000000002457

Nearby Bridges

I-75 over Straits Of Mackinac 0.6 mi Fair Us-2|i-75 Bl over I-75 NB 0.9 mi Fair I-75 NB over Portage ST 1.5 mi Fair I-75 SB over Portage ST 1.5 mi Fair I-75 NB over Cheeseman RD 2.3 mi Poor I-75 SB over Cheeseman RD 2.3 mi Poor I-75 S Appr over Huron AVE 4.1 mi Fair I-75 Bl over I-75 NB 4.3 mi Fair I-75 NB over Central ST 4.5 mi Fair I-75 NB over D&m Rr (abn) 4.6 mi Fair