Structure 7300 · Monroe County, MI

Raisinville RD over River Raisin

Carries Raisinville RD over River Raisin, .10 Mi North Of M 50.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure8/9 · Very Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT400 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 8/9Substructure 6/9 · sets the rating

400 ft end to end, longest span 85 ft: about 6 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.

Built196858 years old
Length399.9 ft121.9 m
Daily traffic5,940counted 2009
Last inspectedSeptember 2023every 24 months

Location

StateMichigan
CountyMonroe
Location.10 Mi North Of M 50
CarriesRaisinville RD
CrossesRiver Raisin
Coordinates41.93510, -83.46200

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length399.9 ft (121.9 m)
Max Span85.0 ft (25.9 m)
Deck Width42.0 ft (12.8 m)
Deck Area1560.3 sq m
Main Spans5
Year Built1968

Traffic

Avg Daily Traffic5,940 (2009)
Truck Traffic7%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number000000000007300

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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