Structure 7195 · Monroe County, MI

I-75 over Ns & Cn Railroad

Carries I-75 over Ns & Cn Railroad, 0.7 Mi N Of M-50.

Overall conditionGood

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

How ratings work
Decksets the rating7/9 · 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 FT346 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 8/9Substructure 7/9 · sets the rating

346 ft end to end, longest span 84 ft: about 5 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 multi-beam bridge.

Built1956rebuilt 2016
Length346.5 ft105.6 m
Daily traffic65,200counted 2013
Last inspectedSeptember 2024every 24 months

Location

StateMichigan
CountyMonroe
Location0.7 Mi N Of M-50
CarriesI-75
CrossesNs & Cn Railroad
Coordinates41.93653, -83.35973

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length346.5 ft (105.6 m)
Max Span83.7 ft (25.5 m)
Deck Width125.3 ft (38.2 m)
Deck Area4033.9 sq m
Main Spans5
Year Built1956 (reconstructed 2016)

Traffic

Avg Daily Traffic65,200 (2013)
Truck Traffic21%
Lanes On Bridge6

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000007195

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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