US Bridges

I-75 SB over Swan Creek

Fair

Monroe County, Michigan · 5.3 MI SW of Wayne Col · Structure no. 000000000007192

Built
1954
71 years old, rebuilt 2022
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
115 ft
1 main span
Daily traffic
25,163
2007 count
Owner
State
State Highway Agency

About this bridge

I-75 SB over Swan Creek is a prestressed concrete stringer/multi-beam or girder carrying I-75 SB over Swan Creek in Monroe County, Michigan. It was built in 1954 and reconstructed in 2022, so it is 71 years old, older than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 25,163 vehicles a day, roughly 32% of them trucks, projected to reach 30,544 by 2018. The structure is 115 ft (35.1 m) long and 68 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-75 SB
CrossesSwan Creek
Location5.3 MI SW of Wayne Col
RouteInterstate 75
CountyMonroe County
StateMichigan
Coordinates42.00669, -83.31262
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.8 US tons
Inventory rating50.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadGreater than HL 93
Structure length115 ft (35.1 m)
Longest span110 ft (33.5 m)
Deck width68 ft (20.7 m)
Roadway width65 ft (19.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,163 (2007)
Projected traffic30,544 by 2018
Trucks32%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-75 SB over Swan Creek built?

It was built in 1954, making it 71 years old in 2025. It was reconstructed in 2022.

What condition is I-75 SB over Swan Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2023.

How much traffic does I-75 SB over Swan Creek carry?

About 25,163 vehicles per day (2007 count), of which roughly 32% are trucks.

How long is I-75 SB over Swan Creek?

The structure is 115 ft (35.1 m) long with a longest span of 110 ft (33.5 m) and a deck 68 ft wide.

Who owns I-75 SB over Swan Creek?

It is owned by the State Highway Agency.