US Bridges

I-475 over CSX RR and Pierson RD

Fair

Genesee County, Michigan · In City of Flint · Structure no. 000000000002647

Built
1976
49 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
347 ft
3 main spans
Daily traffic
45,200
2007 count
Owner
State
State Highway Agency

About this bridge

I-475 over CSX RR and Pierson RD is a steel stringer/multi-beam or girder carrying I-475 over CSX RR and Pierson RD in Genesee County, Michigan. It was built in 1976, so it is 49 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 5 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 45,200 vehicles a day, roughly 4% of them trucks, projected to reach 50,712 by 2018. The structure is 347 ft (105.7 m) long and 133 ft wide.

Location

Open in Google Maps
CarriesI-475
CrossesCSX RR and Pierson RD
LocationIn City of Flint
RouteInterstate 475
CountyGenesee County
StateMichigan
Coordinates43.06133, -83.67731
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73.2 US tons
Inventory rating44 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length347 ft (105.7 m)
Longest span150 ft (45.7 m)
Deck width133 ft (40.4 m)
Roadway width130 ft (39.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic45,200 (2007)
Projected traffic50,712 by 2018
Trucks4%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesThird level (interchange)
CrossesHighway and railroad
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 proposedDeck replacement with only incidental widening
Estimated improvement cost$598,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-475 over CSX RR and Pierson RD built?

It was built in 1976, making it 49 years old in 2025.

What condition is I-475 over CSX RR and Pierson RD 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 I-475 over CSX RR and Pierson RD carry?

About 45,200 vehicles per day (2007 count), of which roughly 4% are trucks.

How long is I-475 over CSX RR and Pierson RD?

The structure is 347 ft (105.7 m) long with a longest span of 150 ft (45.7 m) and a deck 133 ft wide.

Who owns I-475 over CSX RR and Pierson RD?

It is owned by the State Highway Agency.