Structure 2290 · Eaton County, MI

I-496 WB over I-96

Carries I-496 WB over I-96, 3.5 Mi W Of Lansing.

Overall conditionFair

Set by its lowest-rated component: Superstructure at 5 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructuresets the rating5/9 · Fair
Substructure6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT233 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 5/9 · sets the ratingSubstructure 6/9

233 ft end to end, longest span 81 ft: about 3 semi-trucks nose to tail. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built1969rebuilt 2001
Length232.6 ft70.9 m
Daily traffic17,512counted 2018
Last inspectedOctober 2023every 24 months

Location

StateMichigan
CountyEaton
Location3.5 Mi W Of Lansing
CarriesI-496 WB
CrossesI-96
Coordinates42.71984, -84.66879

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length232.6 ft (70.9 m)
Max Span81.0 ft (24.7 m)
Deck Width42.7 ft (13 m)
Deck Area921.7 sq m
Main Spans4
Year Built1969 (reconstructed 2001)

Traffic

Avg Daily Traffic17,512 (2018)
Truck Traffic8%
Lanes On Bridge2
Lanes Under Bridge6

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000002290

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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