Structure 10848 · Washtenaw County, MI

Grove ST over I-94

Carries Grove ST over I-94, In Ypsilanti.

Overall conditionFair

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

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT355 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

355 ft end to end, longest span 119 ft: about 5 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.

Built1972rebuilt 2005
Length354.7 ft108.1 m
Daily traffic11,296counted 2019
Last inspectedJuly 2024every 24 months

Location

StateMichigan
CountyWashtenaw
LocationIn Ypsilanti
CarriesGrove ST
CrossesI-94
Coordinates42.23145, -83.59988

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length354.7 ft (108.1 m)
Max Span118.8 ft (36.2 m)
Deck Width66.3 ft (20.2 m)
Deck Area2183.6 sq m
Main Spans4
Year Built1972 (reconstructed 2005)

Traffic

Avg Daily Traffic11,296 (2019)
Truck Traffic4%
Lanes On Bridge3
Lanes Under Bridge6

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000010848

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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