US Bridges

Third ST over I-475

Fair

Genesee County, Michigan · In Flint · Structure no. 000000000002667

Built
1976
49 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
162 ft
2 main spans
Daily traffic
3,379
1997 count
Owner
State
State Highway Agency

About this bridge

Third ST over I-475 is a steel stringer/multi-beam or girder carrying Third ST over I-475 in Genesee County, Michigan. It was built in 1976, so it is 49 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 3,379 vehicles a day, roughly 3% of them trucks, projected to reach 3,733 by 2017. The structure is 162 ft (49.4 m) long and 44 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesThird ST
CrossesI-475
LocationIn Flint
RouteCity Street 2002
CountyGenesee County
StateMichigan
Coordinates43.01661, -83.68352
Functional classUrban 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
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 rating103.2 US tons
Inventory rating61.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length162 ft (49.4 m)
Longest span82 ft (24.9 m)
Deck width44 ft (13.5 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,379 (1997)
Projected traffic3,733 by 2017
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Third ST over I-475 built?

It was built in 1976, making it 49 years old in 2025.

What condition is Third ST 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 Third ST over I-475 carry?

About 3,379 vehicles per day (1997 count), of which roughly 3% are trucks.

How long is Third ST over I-475?

The structure is 162 ft (49.4 m) long with a longest span of 82 ft (24.9 m) and a deck 44 ft wide.

Who owns Third ST over I-475?

It is owned by the State Highway Agency.