US Bridges

Newport RD over I-275

Fair

Monroe County, Michigan · SE of Carleton · Structure no. 000000000007213

Built
1973
52 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
328 ft
4 main spans
Daily traffic
460
1995 count
Owner
State
State Highway Agency

About this bridge

Newport RD over I-275 is a steel stringer/multi-beam or girder carrying Newport RD 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 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 460 vehicles a day, projected to reach 460 by 2015. The structure is 328 ft (100.1 m) long and 49 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesNewport RD
CrossesI-275
LocationSE of Carleton
RouteCounty Highway 5874
CountyMonroe County
StateMichigan
Coordinates42.00751, -83.33824
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating79.7 US tons
Inventory rating47.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length328 ft (100.1 m)
Longest span121 ft (37 m)
Deck width49 ft (14.8 m)
Roadway width45 ft (13.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic460 (1995)
Projected traffic460 by 2015
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.2 mi (10 km)
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 proposedDeck replacement with only incidental widening
Estimated improvement cost$143,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Newport RD over I-275 built?

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

What condition is Newport RD 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 2024.

How much traffic does Newport RD over I-275 carry?

About 460 vehicles per day (1995 count).

How long is Newport RD over I-275?

The structure is 328 ft (100.1 m) long with a longest span of 121 ft (37 m) and a deck 49 ft wide.

Who owns Newport RD over I-275?

It is owned by the State Highway Agency.