US Bridges

ST Joseph-Main ST over I-496

Fair

Ingham County, Michigan · W Lts of Lansing · Structure no. 000000000003748

Built
1969
56 years old, rebuilt 2021
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
434 ft
6 main spans
Daily traffic
2,850
2018 count
Owner
State
State Highway Agency

About this bridge

ST Joseph-Main ST over I-496 is a steel stringer/multi-beam or girder carrying ST Joseph-Main ST over I-496 in Ingham County, Michigan. It was built in 1969 and reconstructed in 2021, so it is 56 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 2,850 vehicles a day, roughly 4% of them trucks, projected to reach 3,785 by 2040. The structure is 434 ft (132.4 m) long and 36 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesST Joseph-Main ST
CrossesI-496
LocationW Lts of Lansing
RouteCounty Highway 0
CountyIngham County
StateMichigan
Coordinates42.72583, -84.5843
Functional classUrban Minor Arterial

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.
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 inspectionSeptember 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 geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating90.7 US tons
Inventory rating51 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length434 ft (132.4 m)
Longest span95 ft (28.9 m)
Deck width36 ft (11.1 m)
Roadway width33 ft (10.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,850 (2018)
Projected traffic3,785 by 2040
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$461,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was ST Joseph-Main ST over I-496 built?

It was built in 1969, making it 56 years old in 2025. It was reconstructed in 2021.

What condition is ST Joseph-Main ST over I-496 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 September 2023.

How much traffic does ST Joseph-Main ST over I-496 carry?

About 2,850 vehicles per day (2018 count), of which roughly 4% are trucks.

How long is ST Joseph-Main ST over I-496?

The structure is 434 ft (132.4 m) long with a longest span of 95 ft (28.9 m) and a deck 36 ft wide.

Who owns ST Joseph-Main ST over I-496?

It is owned by the State Highway Agency.