US Bridges

I-496 WB over I-96

Fair

Eaton County, Michigan · 3.5 MI W of Lansing · Structure no. 000000000002290

Built
1969
56 years old, rebuilt 2001
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
233 ft
4 main spans
Daily traffic
17,512
2018 count
Owner
State
State Highway Agency

About this bridge

I-496 WB over I-96 is a steel stringer/multi-beam or girder carrying I-496 WB over I-96 in Eaton County, Michigan. It was built in 1969 and reconstructed in 2001, 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 17,512 vehicles a day, roughly 8% of them trucks, projected to reach 19,550 by 2040. The structure is 233 ft (70.9 m) long and 43 ft wide.

Location

Open in Google Maps
CarriesI-496 WB
CrossesI-96
Location3.5 MI W of Lansing
RouteInterstate 496
CountyEaton County
StateMichigan
Coordinates42.71984, -84.66879
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 geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.2 US tons
Inventory rating40.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length233 ft (70.9 m)
Longest span81 ft (24.7 m)
Deck width43 ft (13 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,512 (2018)
Projected traffic19,550 by 2040
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
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-496 WB over I-96 built?

It was built in 1969, making it 56 years old in 2025. It was reconstructed in 2001.

What condition is I-496 WB over I-96 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-496 WB over I-96 carry?

About 17,512 vehicles per day (2018 count), of which roughly 8% are trucks.

How long is I-496 WB over I-96?

The structure is 233 ft (70.9 m) long with a longest span of 81 ft (24.7 m) and a deck 43 ft wide.

Who owns I-496 WB over I-96?

It is owned by the State Highway Agency.