US Bridges

I-75 SB over Squaconning Creek

Fair

Bay County, Michigan · 2.4 MI N of Saginaw Col · Structure no. 000000000000598

Built
1960
65 years old, rebuilt 2009
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
114 ft
2 main spans
Daily traffic
57,600
2009 count
Owner
State
State Highway Agency

About this bridge

I-75 SB over Squaconning Creek is a steel stringer/multi-beam or girder carrying I-75 SB over Squaconning Creek in Bay County, Michigan. It was built in 1960 and reconstructed in 2009, so it is 65 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 57,600 vehicles a day, roughly 6% of them trucks, projected to reach 76,000 by 2032. The structure is 114 ft (34.7 m) long and 100 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-75 SB
CrossesSquaconning Creek
Location2.4 MI N of Saginaw Col
RouteInterstate 75
CountyBay County
StateMichigan
Coordinates43.55676, -83.94695
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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 rating72.5 US tons
Inventory rating43.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length114 ft (34.7 m)
Longest span54 ft (16.6 m)
Deck width100 ft (30.5 m)
Roadway width97 ft (29.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic57,600 (2009)
Projected traffic76,000 by 2032
Trucks6%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-75 SB over Squaconning Creek built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 2009.

What condition is I-75 SB over Squaconning Creek 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 2024.

How much traffic does I-75 SB over Squaconning Creek carry?

About 57,600 vehicles per day (2009 count), of which roughly 6% are trucks.

How long is I-75 SB over Squaconning Creek?

The structure is 114 ft (34.7 m) long with a longest span of 54 ft (16.6 m) and a deck 100 ft wide.

Who owns I-75 SB over Squaconning Creek?

It is owned by the State Highway Agency.