Structure 6170 · Macomb County, MI

I-94 EB over Crocker RD

Carries I-94 EB over Crocker RD, 0.5 Mi SE Of Mt Clemens.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructure6/9 · Satisfactory
Substructure6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT380 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 6/9Substructure 6/9

380 ft end to end, longest span 100 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.

Built1963rebuilt 2006
Length379.9 ft115.8 m
Daily traffic49,601counted 2007
Last inspectedJune 2023every 24 months

Location

StateMichigan
CountyMacomb
Location0.5 Mi SE Of Mt Clemens
CarriesI-94 EB
CrossesCrocker RD
Coordinates42.57799, -82.85800

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length379.9 ft (115.8 m)
Max Span99.7 ft (30.4 m)
Deck Width57.1 ft (17.4 m)
Deck Area2014.9 sq m
Main Spans5
Year Built1963 (reconstructed 2006)

Traffic

Avg Daily Traffic49,601 (2007)
Truck Traffic6%
Lanes On Bridge3
Lanes Under Bridge2

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000006170

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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