US Bridges

Carpenter Road over I-475

Fair

Genesee County, Michigan · At N Limits of Flint · Structure no. 000000000002678

Built
1978
47 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
159 ft
2 main spans
Daily traffic
4,370
2021 count
Owner
State
State Highway Agency

About this bridge

Carpenter Road over I-475 is a steel stringer/multi-beam or girder carrying Carpenter Road over I-475 in Genesee County, Michigan. It was built in 1978, so it is 47 years old, younger 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 4,370 vehicles a day, roughly 3% of them trucks, projected to reach 4,624 by 2042. The structure is 159 ft (48.5 m) long and 80 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCarpenter Road
CrossesI-475
LocationAt N Limits of Flint
RouteCounty Highway 0
CountyGenesee County
StateMichigan
Coordinates43.07579, -83.68352
Functional classUrban Minor Arterial

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 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.1 US tons
Inventory rating49.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length159 ft (48.5 m)
Longest span82 ft (24.9 m)
Deck width80 ft (24.3 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,370 (2021)
Projected traffic4,624 by 2042
Trucks3%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 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$96,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Carpenter Road over I-475 built?

It was built in 1978, making it 47 years old in 2025.

What condition is Carpenter Road over I-475 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 2024.

How much traffic does Carpenter Road over I-475 carry?

About 4,370 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Carpenter Road over I-475?

The structure is 159 ft (48.5 m) long with a longest span of 82 ft (24.9 m) and a deck 80 ft wide.

Who owns Carpenter Road over I-475?

It is owned by the State Highway Agency.