US Bridges

Carleton-Rockwood over I-275

Fair

Monroe County, Michigan · 5 MI W of Rockwood · Structure no. 000000000007218

Built
1973
52 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
347 ft
4 main spans
Daily traffic
1,870
1995 count
Owner
State
State Highway Agency

About this bridge

Carleton-Rockwood over I-275 is a steel stringer/multi-beam or girder carrying Carleton-Rockwood over I-275 in Monroe County, Michigan. It was built in 1973, 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 5 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 1,870 vehicles a day, projected to reach 1,870 by 2015. The structure is 347 ft (105.8 m) long and 44 ft wide.

Location

Open in Google Maps
CarriesCarleton-Rockwood
CrossesI-275
Location5 MI W of Rockwood
RouteCounty Highway 5890
CountyMonroe County
StateMichigan
Coordinates42.06498, -83.36159
Functional classRural Major Collector

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating86.4 US tons
Inventory rating41.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length347 ft (105.8 m)
Longest span131 ft (39.9 m)
Deck width44 ft (13.5 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,870 (1995)
Projected traffic1,870 by 2015
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemNo

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 Carleton-Rockwood over I-275 built?

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

What condition is Carleton-Rockwood over I-275 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 September 2023.

How much traffic does Carleton-Rockwood over I-275 carry?

About 1,870 vehicles per day (1995 count).

How long is Carleton-Rockwood over I-275?

The structure is 347 ft (105.8 m) long with a longest span of 131 ft (39.9 m) and a deck 44 ft wide.

Who owns Carleton-Rockwood over I-275?

It is owned by the State Highway Agency.