US Bridges

I-75 SB over Hesr

Fair

Bay County, Michigan · 1.5 MI W of Bay City · Structure no. 000000000000625

Built
1960
65 years old, rebuilt 2001
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
139 ft
3 main spans
Daily traffic
18,568
2007 count
Owner
State
State Highway Agency

About this bridge

I-75 SB over Hesr is a steel stringer/multi-beam or girder carrying I-75 SB over Hesr in Bay County, Michigan. It was built in 1960 and reconstructed in 2001, 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 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 18,568 vehicles a day, roughly 9% of them trucks, projected to reach 46,919 by 2018. The structure is 139 ft (42.3 m) long and 47 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-75 SB
CrossesHesr
Location1.5 MI W of Bay City
RouteInterstate 75
CountyBay County
StateMichigan
Coordinates43.60602, -83.94804
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length139 ft (42.3 m)
Longest span46 ft (14 m)
Deck width47 ft (14.4 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,568 (2007)
Projected traffic46,919 by 2018
Trucks9%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
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-75 SB over Hesr built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 2001.

What condition is I-75 SB over Hesr 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 September 2023.

How much traffic does I-75 SB over Hesr carry?

About 18,568 vehicles per day (2007 count), of which roughly 9% are trucks.

How long is I-75 SB over Hesr?

The structure is 139 ft (42.3 m) long with a longest span of 46 ft (14 m) and a deck 47 ft wide.

Who owns I-75 SB over Hesr?

It is owned by the State Highway Agency.