US Bridges

I-475 over Stewart Ave

Fair

Genesee County, Michigan · In Flint · Structure no. 000000000002675

Built
1978
47 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
154 ft
3 main spans
Daily traffic
56,000
2007 count
Owner
State
State Highway Agency

About this bridge

I-475 over Stewart Ave is a steel stringer/multi-beam or girder carrying I-475 over Stewart Ave 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 56,000 vehicles a day, roughly 4% of them trucks, projected to reach 50,712 by 2018. The structure is 154 ft (46.9 m) long and 124 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-475
CrossesStewart Ave
LocationIn Flint
RouteInterstate 475
CountyGenesee County
StateMichigan
Coordinates43.05409, -83.67364
Functional classUrban 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 inspectionApril 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 rating98.2 US tons
Inventory rating59 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length154 ft (46.9 m)
Longest span95 ft (28.9 m)
Deck width124 ft (37.7 m)
Roadway width121 ft (36.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic56,000 (2007)
Projected traffic50,712 by 2018
Trucks4%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
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 proposedDeck replacement with only incidental widening
Estimated improvement cost$181,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-475 over Stewart Ave built?

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

What condition is I-475 over Stewart Ave 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 April 2024.

How much traffic does I-475 over Stewart Ave carry?

About 56,000 vehicles per day (2007 count), of which roughly 4% are trucks.

How long is I-475 over Stewart Ave?

The structure is 154 ft (46.9 m) long with a longest span of 95 ft (28.9 m) and a deck 124 ft wide.

Who owns I-475 over Stewart Ave?

It is owned by the State Highway Agency.