Structure 10922 · Washtenaw County, MI

Curtis Road over M-14

Carries Curtis Road over M-14, 3 Mi W Of Wayne Co Line.

Overall conditionFair

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

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

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT326 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

326 ft end to end, longest span 121 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.

Built1975rebuilt 2006
Length326.1 ft99.4 m
Daily traffic2,328counted 1994
Last inspectedSeptember 2024every 24 months

Location

StateMichigan
CountyWashtenaw
Location3 Mi W Of Wayne Co Line
CarriesCurtis Road
CrossesM-14
Coordinates42.33842, -83.60584

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length326.1 ft (99.4 m)
Max Span121.1 ft (36.9 m)
Deck Width44.3 ft (13.5 m)
Deck Area1341.9 sq m
Main Spans4
Year Built1975 (reconstructed 2006)

Traffic

Avg Daily Traffic2,328 (1994)
Truck Traffic3%
Lanes On Bridge2
Lanes Under Bridge4

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000010922

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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