US Bridges

I-75 NB over Birch Run Creek

Fair

Saginaw County, Michigan · 4.1 MI NW of Genesee Col · Structure no. 000000000009183

Built
1961
64 years old, rebuilt 1999
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
45 ft
1 main span
Daily traffic
25,771
2007 count
Owner
State
State Highway Agency

About this bridge

I-75 NB over Birch Run Creek is a steel stringer/multi-beam or girder carrying I-75 NB over Birch Run Creek in Saginaw County, Michigan. It was built in 1961 and reconstructed in 1999, so it is 64 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 25,771 vehicles a day, roughly 13% of them trucks, projected to reach 37,339 by 2018. The structure is 45 ft (13.7 m) long and 74 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI-75 NB
CrossesBirch Run Creek
Location4.1 MI NW of Genesee Col
RouteInterstate 75
Coordinates43.27443, -83.79991
Functional classRural 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69.3 US tons
Inventory rating41.4 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length45 ft (13.7 m)
Longest span45 ft (13.7 m)
Deck width74 ft (22.6 m)
Roadway width61 ft (18.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,771 (2007)
Projected traffic37,339 by 2018
Trucks13%
Lanes on structure3
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 Birch Run Creek built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 1999.

What condition is I-75 NB over Birch Run 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 August 2023.

How much traffic does I-75 NB over Birch Run Creek carry?

About 25,771 vehicles per day (2007 count), of which roughly 13% are trucks.

How long is I-75 NB over Birch Run Creek?

The structure is 45 ft (13.7 m) long with a longest span of 45 ft (13.7 m) and a deck 74 ft wide.

Who owns I-75 NB over Birch Run Creek?

It is owned by the State Highway Agency.