Structure 7087 · Monroe County, MI

Milan-oakville RD over Us-23

Carries Milan-oakville RD over Us-23, @ Washtenaw Co Line.

Overall conditionFair

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

How ratings work
Deck6/9 · Satisfactory
Superstructuresets the rating5/9 · Fair
Substructure6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT143 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 5/9 · sets the ratingSubstructure 6/9

143 ft end to end, longest span 80 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.

Built195076 years old
Length142.7 ft43.5 m
Daily traffic881counted 1997
Last inspectedJanuary 2025every 4 months

Location

StateMichigan
CountyMonroe
Location@ Washtenaw Co Line
CarriesMilan-oakville RD
CrossesUs-23
Coordinates42.08432, -83.67178

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length142.7 ft (43.5 m)
Max Span79.7 ft (24.3 m)
Deck Width34.1 ft (10.4 m)
Deck Area452.4 sq m
Main Spans3
Year Built1950

Traffic

Avg Daily Traffic881 (1997)
Truck Traffic3%
Lanes On Bridge2
Lanes Under Bridge4

Inspection & Ownership

Last InspectionJanuary 2025
Inspection FrequencyEvery 4 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000007087

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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