Structure 4404 · Jackson County, MI

M-50 Us-127br over Mdot Rr Corridor

Carries M-50 Us-127br over Mdot Rr Corridor, In Jackson (west Ave).

Overall conditionGood

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

How ratings work
Deck8/9 · Very Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT134 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 7/9 · sets the ratingSubstructure 7/9 · sets the rating

134 ft end to end, longest span 72 ft. 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.

Built201214 years old
Length133.5 ft40.7 m
Daily traffic15,194counted 2007
Last inspectedOctober 2024every 24 months

Location

StateMichigan
CountyJackson
LocationIn Jackson (west Ave)
CarriesM-50 Us-127br
CrossesMdot Rr Corridor
Coordinates42.25357, -84.42340

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length133.5 ft (40.7 m)
Max Span71.9 ft (21.9 m)
Deck Width49.9 ft (15.2 m)
Deck Area618.6 sq m
Main Spans3
Year Built2012

Traffic

Avg Daily Traffic15,194 (2007)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000004404

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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