US Bridges

I-275 SB over Gtw RR

Fair

Monroe County, Michigan · 1 MI E of Carleton · Structure no. 000000000007207

Built
1973
52 years old, rebuilt 2006
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
187 ft
3 main spans
Daily traffic
19,015
2007 count
Owner
State
State Highway Agency

About this bridge

I-275 SB over Gtw RR is a steel stringer/multi-beam or girder carrying I-275 SB over Gtw RR in Monroe County, Michigan. It was built in 1973 and reconstructed in 2006, so it is 52 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 19,015 vehicles a day, roughly 19% of them trucks, projected to reach 17,579 by 2018. The structure is 187 ft (57 m) long and 77 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-275 SB
CrossesGtw RR
Location1 MI E of Carleton
RouteInterstate 275
CountyMonroe County
StateMichigan
Coordinates42.06989, -83.3656
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating105.7 US tons
Inventory rating63.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length187 ft (57 m)
Longest span86 ft (26.1 m)
Deck width77 ft (23.4 m)
Roadway width47 ft (14.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,015 (2007)
Projected traffic17,579 by 2018
Trucks19%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-275 SB over Gtw RR built?

It was built in 1973, making it 52 years old in 2025. It was reconstructed in 2006.

What condition is I-275 SB over Gtw RR 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 July 2023.

How much traffic does I-275 SB over Gtw RR carry?

About 19,015 vehicles per day (2007 count), of which roughly 19% are trucks.

How long is I-275 SB over Gtw RR?

The structure is 187 ft (57 m) long with a longest span of 86 ft (26.1 m) and a deck 77 ft wide.

Who owns I-275 SB over Gtw RR?

It is owned by the State Highway Agency.