US Bridges

I-675 SB over 6th ST

Good

Saginaw County, Michigan · In Saginaw · Structure no. 000000000009131

Built
2011
14 years old
Condition
Good
inspected October 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
68 ft
1 main span
Daily traffic
11,654
2017 count
Owner
State
State Highway Agency

About this bridge

I-675 SB over 6th ST is a prestressed concrete box beam or girders - single or spread carrying I-675 SB over 6th ST in Saginaw County, Michigan. It was built in 2011, so it is 14 years old, younger than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 11,654 vehicles a day, roughly 8% of them trucks, projected to reach 13,402 by 2037. The structure is 68 ft (20.6 m) long and 60 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-675 SB
Crosses6th ST
LocationIn Saginaw
RouteInterstate 675
CountySaginaw County
StateMichigan
Coordinates43.43588, -83.92654
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.9 US tons
Inventory rating46.1 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length68 ft (20.6 m)
Longest span65 ft (19.7 m)
Deck width60 ft (18.3 m)
Roadway width57 ft (17.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,654 (2017)
Projected traffic13,402 by 2037
Trucks8%
Lanes on structure2
Traffic directionOne-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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-675 SB over 6th ST built?

It was built in 2011, making it 14 years old in 2025.

What condition is I-675 SB over 6th ST in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2024.

How much traffic does I-675 SB over 6th ST carry?

About 11,654 vehicles per day (2017 count), of which roughly 8% are trucks.

How long is I-675 SB over 6th ST?

The structure is 68 ft (20.6 m) long with a longest span of 65 ft (19.7 m) and a deck 60 ft wide.

Who owns I-675 SB over 6th ST?

It is owned by the State Highway Agency.