US Bridges

I-675 over Sag Riv H&e Sbs RR M13

Fair

Saginaw County, Michigan · In Saginaw · Structure no. 000000000009115

Built
1971
54 years old, rebuilt 2009
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
2,948 ft
3 main spans
Daily traffic
25,285
2017 count
Owner
State
State Highway Agency

About this bridge

I-675 over Sag Riv H&e Sbs RR M13 is a steel continuous stringer/multi-beam or girder carrying I-675 over Sag Riv H&e Sbs RR M13 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 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 25,285 vehicles a day, roughly 3% of them trucks, projected to reach 29,078 by 2037. The structure is 2,948 ft (898.7 m) long and 94 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesI-675
CrossesSag Riv H&e Sbs RR M13
LocationIn Saginaw
RouteInterstate 675
CountySaginaw County
StateMichigan
Coordinates43.4371, -83.93769
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.4 US tons
Inventory rating33.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+39 approach)
Design loadHS 20 + Mod
Structure length2,948 ft (898.7 m)
Longest span142 ft (43.2 m)
Deck width94 ft (28.7 m)
Roadway width87 ft (26.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,285 (2017)
Projected traffic29,078 by 2037
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway, waterway and railroad
Detour if closed1.9 mi (3 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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was I-675 over Sag Riv H&e Sbs RR M13 built?

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

What condition is I-675 over Sag Riv H&e Sbs RR M13 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 May 2023.

How much traffic does I-675 over Sag Riv H&e Sbs RR M13 carry?

About 25,285 vehicles per day (2017 count), of which roughly 3% are trucks.

How long is I-675 over Sag Riv H&e Sbs RR M13?

The structure is 2,948 ft (898.7 m) long with a longest span of 142 ft (43.2 m) and a deck 94 ft wide.

Who owns I-675 over Sag Riv H&e Sbs RR M13?

It is owned by the State Highway Agency.