I-75 Intl Bridge over ST Mary Riv/portage Av W

Fair Condition64 years old5,242 vehicles/day

Location

StateMichigan
CountyChippewa
LocationIn Sault Ste Marie
CarriesI-75 Intl Bridge
CrossesST Mary Riv/portage Av W
Coordinates46.50842, -84.36065

Condition Ratings

Overall ConditionFair
Deck6 (Satisfactory)
Superstructure6 (Satisfactory)
Substructure6 (Satisfactory)
Channel/Waterway8 (Very Good)
Scour Critical8 — Stable, low risk

Physical Characteristics

MaterialSteel Continuous
DesignTruss - Thru
Total Length9280.2 ft (2828.6 m)
Max Span430.1 ft (131.1 m)
Deck Width34.4 ft (10.5 m)
Deck Area29700.3 sq m
Main Spans8
Year Built1962

Traffic

Avg Daily Traffic5,242 (2007)
Truck Traffic9%
Lanes On Bridge2
Lanes Under Bridge5

Inspection & Ownership

Last Inspection823
Inspection FrequencyEvery 24 months
OwnerState Toll Authority
Historical SignificanceBridge is on the National Register of Historic Places
Structure Number000000000001582

Nearby Bridges

West Portage Ave. over Power Canal 0.7 mi Fair Fort Street over Power Canal 0.8 mi Good I-75 Bs (ashmun) over Power Canal 1.0 mi Fair Bingham Ave. over Power Canal 1.2 mi Fair Easterday AVE over I-75 NB 1.3 mi Fair Easterday Ave. over Ashmun Creek 1.3 mi Good Johnston St. over Power Canal 1.4 mi Fair Spruce St. over Power Canal 1.5 mi Fair I-75 Bs (portage) over Power Canal 1.6 mi Fair IRR BIA RTE 3 over Mission Creek 2.8 mi Fair