US Bridges

I-69 WB over Gtw RR

Fair

St. Clair County, Michigan · 0.7 MI E of I-94 · Structure no. 000000000009932

Built
1965
60 years old, rebuilt 2007
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
153 ft
3 main spans
Daily traffic
4,887
2007 count
Owner
State
State Highway Agency

About this bridge

I-69 WB over Gtw RR is a prestressed concrete stringer/multi-beam or girder carrying I-69 WB over Gtw RR in St. Clair County, Michigan. It was built in 1965 and reconstructed in 2007, so it is 60 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 4,887 vehicles a day, roughly 4% of them trucks, projected to reach 6,274 by 2018. The structure is 153 ft (46.5 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
CrossesGtw RR
Location0.7 MI E of I-94
RouteInterstate 69
CountySt. Clair County
StateMichigan
Coordinates42.97151, -82.46874
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 inspectionOctober 2023
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 geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.8 US tons
Inventory rating45.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length153 ft (46.5 m)
Longest span51 ft (15.5 m)
Deck width42 ft (12.9 m)
Roadway width38 ft (11.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,887 (2007)
Projected traffic6,274 by 2018
Trucks4%
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 Gtw RR built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 2007.

What condition is I-69 WB over Gtw 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 Gtw RR carry?

About 4,887 vehicles per day (2007 count), of which roughly 4% are trucks.

How long is I-69 WB over Gtw RR?

The structure is 153 ft (46.5 m) long with a longest span of 51 ft (15.5 m) and a deck 42 ft wide.

Who owns I-69 WB over Gtw RR?

It is owned by the State Highway Agency.