Structure 8232 · Oakland County, MI

Northlawn BLVD over Rouge River

Carries Northlawn BLVD over Rouge River, 0.3 Mi W Of Southfield RD.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT56 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 6/9 · sets the rating

56 ft end to end. Lengths and the car 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.

Built1961rebuilt 2008
Length55.8 ft17 m
Daily traffic775counted 2004
Last inspectedOctober 2024every 24 months

Location

StateMichigan
CountyOakland
Location0.3 Mi W Of Southfield RD
CarriesNorthlawn BLVD
CrossesRouge River
Coordinates42.53569, -83.23015

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length55.8 ft (17 m)
Max Span52.8 ft (16.1 m)
Deck Width38.4 ft (11.7 m)
Deck Area198.9 sq m
Main Spans1
Year Built1961 (reconstructed 2008)

Traffic

Avg Daily Traffic775 (2004)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000000008232

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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