US Bridges

I-69 WB over CSX RR

Fair

St. Clair County, Michigan · 1.5 MI W of I-94 · Structure no. 000000000009931

Built
1966
59 years old, rebuilt 2007
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
243 ft
3 main spans
Daily traffic
9,344
2007 count
Owner
State
State Highway Agency

About this bridge

I-69 WB over CSX RR is a steel stringer/multi-beam or girder carrying I-69 WB over CSX RR in St. Clair County, Michigan. It was built in 1966 and reconstructed in 2007, so it is 59 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 9,344 vehicles a day, roughly 18% of them trucks, projected to reach 11,976 by 2018. The structure is 243 ft (74.1 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-69 WB
CrossesCSX RR
Location1.5 MI W of I-94
RouteInterstate 69
CountySt. Clair County
StateMichigan
Coordinates42.97204, -82.50969
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.
Substructure7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating71.4 US tons
Inventory rating42.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length243 ft (74.1 m)
Longest span83 ft (25.2 m)
Deck width42 ft (12.9 m)
Roadway width38 ft (11.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,344 (2007)
Projected traffic11,976 by 2018
Trucks18%
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-69 WB over CSX RR built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 2007.

What condition is I-69 WB over CSX RR 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 October 2023.

How much traffic does I-69 WB over CSX RR carry?

About 9,344 vehicles per day (2007 count), of which roughly 18% are trucks.

How long is I-69 WB over CSX RR?

The structure is 243 ft (74.1 m) long with a longest span of 83 ft (25.2 m) and a deck 42 ft wide.

Who owns I-69 WB over CSX RR?

It is owned by the State Highway Agency.