US Bridges

I-69 WB over Hammerberg Road

Fair

Genesee County, Michigan · In Flint · Structure no. 000000000002604

Built
1970
55 years old, rebuilt 2019
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
182 ft
4 main spans
Daily traffic
31,275
2017 count
Owner
State
State Highway Agency

About this bridge

I-69 WB over Hammerberg Road is a steel stringer/multi-beam or girder carrying I-69 WB over Hammerberg Road in Genesee County, Michigan. It was built in 1970 and reconstructed in 2019, so it is 55 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 31,275 vehicles a day, roughly 8% of them trucks, projected to reach 36,325 by 2037. The structure is 182 ft (55.5 m) long and 76 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-69 WB
CrossesHammerberg Road
LocationIn Flint
RouteInterstate 69
CountyGenesee County
StateMichigan
Coordinates42.9972, -83.70593
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74.6 US tons
Inventory rating42.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length182 ft (55.5 m)
Longest span51 ft (15.5 m)
Deck width76 ft (23.3 m)
Roadway width74 ft (22.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic31,275 (2017)
Projected traffic36,325 by 2037
Trucks8%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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 proposedDeck replacement with only incidental widening
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-69 WB over Hammerberg Road built?

It was built in 1970, making it 55 years old in 2025. It was reconstructed in 2019.

What condition is I-69 WB over Hammerberg Road 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 2024.

How much traffic does I-69 WB over Hammerberg Road carry?

About 31,275 vehicles per day (2017 count), of which roughly 8% are trucks.

How long is I-69 WB over Hammerberg Road?

The structure is 182 ft (55.5 m) long with a longest span of 51 ft (15.5 m) and a deck 76 ft wide.

Who owns I-69 WB over Hammerberg Road?

It is owned by the State Highway Agency.