US Bridges

I-475 Ramp F over I-69 & I-475

Fair

Genesee County, Michigan · In Flint · Structure no. 000000000002659

Built
1970
55 years old, rebuilt 2022
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
452 ft
2 main spans
Daily traffic
6,770
2022 count
Owner
State
State Highway Agency

About this bridge

I-475 Ramp F over I-69 & I-475 is a steel continuous stringer/multi-beam or girder carrying I-475 Ramp F over I-69 & I-475 in Genesee County, Michigan. It was built in 1970 and reconstructed in 2022, 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 6,770 vehicles a day, roughly 7% of them trucks, projected to reach 7,789 by 2042. The structure is 452 ft (137.7 m) long and 28 ft wide.

Location

Open in Google Maps
CarriesI-475 Ramp F
CrossesI-69 & I-475
LocationIn Flint
RouteInterstate 475
CountyGenesee County
StateMichigan
Coordinates43.01049, -83.67929
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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating84.3 US tons
Inventory rating50.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20
Structure length452 ft (137.7 m)
Longest span150 ft (45.7 m)
Deck width28 ft (8.6 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deck15 ft (4.5 m)

Traffic and service

Average daily traffic6,770 (2022)
Projected traffic7,789 by 2042
Trucks7%
Lanes on structure1
Traffic directionOne-way traffic
CarriesThird level (interchange)
CrossesHighway
Detour if closed—
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-475 Ramp F over I-69 & I-475 built?

It was built in 1970, making it 55 years old in 2025. It was reconstructed in 2022.

What condition is I-475 Ramp F over I-69 & I-475 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 July 2024.

How much traffic does I-475 Ramp F over I-69 & I-475 carry?

About 6,770 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is I-475 Ramp F over I-69 & I-475?

The structure is 452 ft (137.7 m) long with a longest span of 150 ft (45.7 m) and a deck 28 ft wide.

Who owns I-475 Ramp F over I-69 & I-475?

It is owned by the State Highway Agency.