US Bridges

I-75 NB over Pinconning River

Good

Bay County, Michigan · 4.0 MI SW of Pinconning · Structure no. 000000000000615

Built
2011
14 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
64 ft
1 main span
Daily traffic
15,522
2007 count
Owner
State
State Highway Agency

About this bridge

I-75 NB over Pinconning River is a prestressed concrete stringer/multi-beam or girder carrying I-75 NB over Pinconning River in Bay 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 15,522 vehicles a day, roughly 8% of them trucks, projected to reach 16,605 by 2030. The structure is 64 ft (19.5 m) long and 49 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-75 NB
CrossesPinconning River
Location4.0 MI SW of Pinconning
RouteInterstate 75
CountyBay County
StateMichigan
Coordinates43.84446, -84.02042
Functional classRural 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.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80.7 US tons
Inventory rating56.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length64 ft (19.5 m)
Longest span63 ft (19.1 m)
Deck width49 ft (15 m)
Roadway width46 ft (14 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,522 (2007)
Projected traffic16,605 by 2030
Trucks8%
Lanes on structure2
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 NB over Pinconning River built?

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

What condition is I-75 NB over Pinconning River 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 August 2023.

How much traffic does I-75 NB over Pinconning River carry?

About 15,522 vehicles per day (2007 count), of which roughly 8% are trucks.

How long is I-75 NB over Pinconning River?

The structure is 64 ft (19.5 m) long with a longest span of 63 ft (19.1 m) and a deck 49 ft wide.

Who owns I-75 NB over Pinconning River?

It is owned by the State Highway Agency.