Structure 11920 · Wayne County, MI

I-275 NB over Lower Rouge R/bike Path

Carries I-275 NB over Lower Rouge R/bike Path, 2.5 Mi W Of Wayne.

Overall conditionGood

Set by its lowest-rated component: Substructure at 7 of 9.

How ratings work
Deck8/9 · Very Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT238 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 7/9 · sets the rating

238 ft end to end, longest span 67 ft: about 3 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.

Built197452 years old
Length238.2 ft72.6 m
Daily traffic53,635counted 2007
Last inspectedOctober 2024every 24 months

Location

StateMichigan
CountyWayne
Location2.5 Mi W Of Wayne
CarriesI-275 NB
CrossesLower Rouge R/bike Path
Coordinates42.28257, -83.44188

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length238.2 ft (72.6 m)
Max Span67.3 ft (20.5 m)
Deck Width63.3 ft (19.3 m)
Deck Area1401.2 sq m
Main Spans4
Year Built1974

Traffic

Avg Daily Traffic53,635 (2007)
Truck Traffic9%
Lanes On Bridge3

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000000011920

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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