Structure 2320 · Eaton County, MI

I-96 WB over Gtw Rr

Carries I-96 WB over Gtw Rr, 0.6 Mi NW Of Lansing RD.

Overall conditionFair

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

How ratings work
Deck6/9 · Satisfactory
Superstructuresets the rating5/9 · Fair
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT175 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 5/9 · sets the ratingSubstructure 7/9

175 ft end to end, longest span 70 ft: about 2 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.

Built196264 years old
Length175.2 ft53.4 m
Daily traffic17,748counted 2007
Last inspectedNovember 2024every 8 months

Location

StateMichigan
CountyEaton
Location0.6 Mi NW Of Lansing RD
CarriesI-96 WB
CrossesGtw Rr
Coordinates42.68251, -84.65850

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length175.2 ft (53.4 m)
Max Span69.9 ft (21.3 m)
Deck Width43.6 ft (13.3 m)
Deck Area710.2 sq m
Main Spans3
Year Built1962

Traffic

Avg Daily Traffic17,748 (2007)
Truck Traffic22%
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2024
Inspection FrequencyEvery 8 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000002320

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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