US Bridges

I-675 S Rp to I-75 over I-75

Fair

Saginaw County, Michigan · @ N JCT I-75 · Structure no. 000000000009152

Built
1971
54 years old, rebuilt 2009
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
377 ft
4 main spans
Daily traffic
1,003
2022 count
Owner
State
State Highway Agency

About this bridge

I-675 S Rp to I-75 over I-75 is a steel stringer/multi-beam or girder carrying I-675 S Rp to I-75 over I-75 in Saginaw County, Michigan. It was built in 1971 and reconstructed in 2009, so it is 54 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 1,003 vehicles a day, roughly 6% of them trucks, projected to reach 1,003 by 2022. The structure is 377 ft (115 m) long and 30 ft wide.

Location

Open in Google Maps
CarriesI-675 S Rp to I-75
CrossesI-75
Location@ N JCT I-75
RouteInterstate 675
CountySaginaw County
StateMichigan
Coordinates43.49895, -83.92999
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 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 rating91.1 US tons
Inventory rating54.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length377 ft (115 m)
Longest span139 ft (42.5 m)
Deck width30 ft (9 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,003 (2022)
Projected traffic1,003 by 2022
Trucks6%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-675 S Rp to I-75 over I-75 built?

It was built in 1971, making it 54 years old in 2025. It was reconstructed in 2009.

What condition is I-675 S Rp to I-75 over I-75 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 November 2024.

How much traffic does I-675 S Rp to I-75 over I-75 carry?

About 1,003 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is I-675 S Rp to I-75 over I-75?

The structure is 377 ft (115 m) long with a longest span of 139 ft (42.5 m) and a deck 30 ft wide.

Who owns I-675 S Rp to I-75 over I-75?

It is owned by the State Highway Agency.