Structure 11000550451026B · Madison County, MS

I 55 over US 51 & Cnic Rr

Carries I 55 over US 51 & Cnic Rr, 0.3 Mi N Hinds Cl.

Overall conditionFair

Set by its lowest-rated component: Deck at 5 of 9.

How ratings work
Decksets the rating5/9 · Fair
Superstructure8/9 · Very Good
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT475 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 8/9Substructure 7/9

475 ft end to end, longest span 70 ft: about 7 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.

Built198541 years old
Length475.1 ft144.8 m
Daily traffic47,000counted 2023
Last inspectedApril 2024every 24 months

Location

StateMississippi
CountyMadison
Location0.3 Mi N Hinds Cl
CarriesI 55
CrossesUS 51 & Cnic Rr
Coordinates32.40477, -90.14564

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length475.1 ft (144.8 m)
Max Span69.9 ft (21.3 m)
Deck Width62.0 ft (18.9 m)
Deck Area2736.7 sq m
Main Spans7
Year Built1985

Traffic

Avg Daily Traffic47,000 (2023)
Truck Traffic6%
Lanes On Bridge3
Lanes Under Bridge4

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 Number11000550451026B

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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