Structure 6196 · Macomb County, MI

WB Metro Parkway over Red Run Drain

Carries WB Metro Parkway over Red Run Drain, 0.1 Mi West Of Utica RD.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT193 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9Substructure 5/9 · sets the rating

193 ft end to end, longest span 49 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.

Built1969rebuilt 2005
Length192.6 ft58.7 m
Daily traffic21,115counted 2007
Last inspectedMay 2024every 24 months

Location

StateMichigan
CountyMacomb
Location0.1 Mi West Of Utica RD
CarriesWB Metro Parkway
CrossesRed Run Drain
Coordinates42.56667, -82.97073

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length192.6 ft (58.7 m)
Max Span48.6 ft (14.8 m)
Deck Width57.7 ft (17.6 m)
Deck Area1033.1 sq m
Main Spans4
Year Built1969 (reconstructed 2005)

Traffic

Avg Daily Traffic21,115 (2007)
Truck Traffic10%
Lanes On Bridge3

Inspection & Ownership

Last InspectionMay 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000000006196

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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