Structure 4446 · Jackson County, MI

M-50 (mcdevitt Rd) over Us-127

Carries M-50 (mcdevitt Rd) over Us-127, @ S Jct M-50.

Overall conditionFair

Set by its lowest-rated component: Superstructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT206 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 7/9

206 ft end to end, longest span 105 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.

Built201214 years old
Length205.7 ft62.7 m
Daily traffic9,715counted 2011
Last inspectedJune 2023every 24 months

Location

StateMichigan
CountyJackson
Location@ S Jct M-50
CarriesM-50 (mcdevitt Rd)
CrossesUs-127
Coordinates42.19693, -84.36955

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length205.7 ft (62.7 m)
Max Span104.7 ft (31.9 m)
Deck Width74.5 ft (22.7 m)
Deck Area1423.3 sq m
Main Spans2
Year Built2012

Traffic

Avg Daily Traffic9,715 (2011)
Truck Traffic6%
Lanes On Bridge3
Lanes Under Bridge5

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000004446

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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