Structure 6194 · Macomb County, MI

Metropolitan PKWY over Conrail Railroad

Carries Metropolitan PKWY over Conrail Railroad, 0.5 Mi West Of Van Dyke.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructuresets the rating5/9 · Fair
Substructuresets the rating5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT245 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 5/9Substructure 5/9

245 ft end to end, longest span 86 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 box-beam bridge.

Built1982rebuilt 1997
Length245.1 ft74.7 m
Daily traffic51,760counted 2011
Last inspectedOctober 2023every 24 months

Location

StateMichigan
CountyMacomb
Location0.5 Mi West Of Van Dyke
CarriesMetropolitan PKWY
CrossesConrail Railroad
Coordinates42.56522, -83.03936

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length245.1 ft (74.7 m)
Max Span86.0 ft (26.2 m)
Deck Width112.5 ft (34.3 m)
Deck Area2562.2 sq m
Main Spans3
Year Built1982 (reconstructed 1997)

Traffic

Avg Daily Traffic51,760 (2011)
Truck Traffic5%
Lanes On Bridge6

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000006194

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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