US Bridges

I-496 WB over Jackson & Lansing RR

Fair

Ingham County, Michigan · In Lansing · Structure no. 000000000003764

Built
1970
55 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
157 ft
3 main spans
Daily traffic
33,453
2007 count
Owner
State
State Highway Agency

About this bridge

I-496 WB over Jackson & Lansing RR is a steel stringer/multi-beam or girder carrying I-496 WB over Jackson & Lansing RR in Ingham County, Michigan. It was built in 1970, so it is 55 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 33,453 vehicles a day, roughly 7% of them trucks, projected to reach 35,237 by 2018. The structure is 157 ft (47.9 m) long and 88 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-496 WB
CrossesJackson & Lansing RR
LocationIn Lansing
RouteInterstate 496
CountyIngham County
StateMichigan
Coordinates42.72574, -84.54265
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74 US tons
Inventory rating44.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length157 ft (47.9 m)
Longest span64 ft (19.5 m)
Deck width88 ft (26.8 m)
Roadway width82 ft (24.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic33,453 (2007)
Projected traffic35,237 by 2018
Trucks7%
Lanes on structure5
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 proposedDeck replacement with only incidental widening
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-496 WB over Jackson & Lansing RR built?

It was built in 1970, making it 55 years old in 2025.

What condition is I-496 WB over Jackson & Lansing 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 September 2023.

How much traffic does I-496 WB over Jackson & Lansing RR carry?

About 33,453 vehicles per day (2007 count), of which roughly 7% are trucks.

How long is I-496 WB over Jackson & Lansing RR?

The structure is 157 ft (47.9 m) long with a longest span of 64 ft (19.5 m) and a deck 88 ft wide.

Who owns I-496 WB over Jackson & Lansing RR?

It is owned by the State Highway Agency.