Structure 11431 · Wayne County, MI

Clairmount Avenue over M-10

Carries Clairmount Avenue over M-10, In Detroit.

Overall conditionFair

Set by its lowest-rated component: Deck and Substructure at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT135 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 6/9 · sets the rating

135 ft end to end, longest span 67 ft. 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.

Built1954rebuilt 1995
Length135.5 ft41.3 m
Daily traffic16,000counted 1993
Last inspectedApril 2023every 24 months

Location

StateMichigan
CountyWayne
LocationIn Detroit
CarriesClairmount Avenue
CrossesM-10
Coordinates42.37972, -83.09022

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length135.5 ft (41.3 m)
Max Span66.6 ft (20.3 m)
Deck Width88.6 ft (27 m)
Deck Area1115.1 sq m
Main Spans2
Year Built1954 (reconstructed 1995)

Traffic

Avg Daily Traffic16,000 (1993)
Lanes On Bridge3
Lanes Under Bridge8

Inspection & Ownership

Last InspectionApril 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000011431

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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