Structure 2663 · Genesee County, MI

S B Service RD over Ramp D I-69&I475 Interch

Carries S B Service RD over Ramp D I-69&I475 Interch, In Flint.

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
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT128 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 7/9 · sets the rating

128 ft end to end. 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.

Built1970rebuilt 2022
Length128.0 ft39 m
Daily traffic16,400counted 1988
Last inspectedApril 2024every 24 months

Location

StateMichigan
CountyGenesee
LocationIn Flint
CarriesS B Service RD
CrossesRamp D I-69&I475 Interch
Coordinates43.01315, -83.68190

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length128.0 ft (39 m)
Max Span124.0 ft (37.8 m)
Deck Width39.4 ft (12 m)
Deck Area468 sq m
Main Spans1
Year Built1970 (reconstructed 2022)

Traffic

Avg Daily Traffic16,400 (1988)
Truck Traffic3%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionApril 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000002663

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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