US Bridges

I-496 WB over US-127 SB

Poor

Ingham County, Michigan · In E Lansing · Structure no. 000000000003777

Built
1970
55 years old
Condition
Poor
inspected February 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
210 ft
3 main spans
Daily traffic
39,163
2019 count
Owner
State
State Highway Agency

About this bridge

I-496 WB over US-127 SB is a steel stringer/multi-beam or girder carrying I-496 WB over US-127 SB 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 39,163 vehicles a day, roughly 4% of them trucks, projected to reach 44,254 by 2039. The structure is 210 ft (64.1 m) long and 54 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesI-496 WB
CrossesUS-127 SB
LocationIn E Lansing
RouteInterstate 496
Coordinates42.72426, -84.50849
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2025
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.2 US tons
Inventory rating37.8 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length210 ft (64.1 m)
Longest span113 ft (34.4 m)
Deck width54 ft (16.6 m)
Roadway width51 ft (15.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic39,163 (2019)
Projected traffic44,254 by 2039
Trucks4%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 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 US-127 SB built?

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

What condition is I-496 WB over US-127 SB in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in February 2025.

How much traffic does I-496 WB over US-127 SB carry?

About 39,163 vehicles per day (2019 count), of which roughly 4% are trucks.

How long is I-496 WB over US-127 SB?

The structure is 210 ft (64.1 m) long with a longest span of 113 ft (34.4 m) and a deck 54 ft wide.

Who owns I-496 WB over US-127 SB?

It is owned by the State Highway Agency.