US Bridges

8th ST Service RD over I-475 Ramp D

Fair

Genesee County, Michigan · In Flint · Structure no. 000000000002662

Built
1970
55 years old, rebuilt 2021
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
105 ft
1 main span
Daily traffic
2,786
2022 count
Owner
State
State Highway Agency

About this bridge

8th ST Service RD over I-475 Ramp D is a steel stringer/multi-beam or girder carrying 8th ST Service RD over I-475 Ramp D in Genesee County, Michigan. It was built in 1970 and reconstructed in 2021, 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 2,786 vehicles a day, roughly 3% of them trucks, projected to reach 3,204 by 2042. The structure is 105 ft (31.9 m) long and 51 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries8th ST Service RD
CrossesI-475 Ramp D
LocationIn Flint
RouteInterstate 69
CountyGenesee County
StateMichigan
Coordinates43.00981, -83.68325
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.
Substructure7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating90.4 US tons
Inventory rating54.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length105 ft (31.9 m)
Longest span105 ft (31.9 m)
Deck width51 ft (15.6 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,786 (2022)
Projected traffic3,204 by 2042
Trucks3%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

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 8th ST Service RD over I-475 Ramp D built?

It was built in 1970, making it 55 years old in 2025. It was reconstructed in 2021.

What condition is 8th ST Service RD over I-475 Ramp D 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 April 2024.

How much traffic does 8th ST Service RD over I-475 Ramp D carry?

About 2,786 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 8th ST Service RD over I-475 Ramp D?

The structure is 105 ft (31.9 m) long with a longest span of 105 ft (31.9 m) and a deck 51 ft wide.

Who owns 8th ST Service RD over I-475 Ramp D?

It is owned by the State Highway Agency.