Structure 11000550610934B · Rankin County, MS

I 55 over US 80/kcs Rr

Carries I 55 over US 80/kcs Rr, I 55 Over US 80.

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
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT2,552 FT OVERALL500 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 8/9Substructure 7/9 · sets the rating

2,552 ft end to end, longest span 70 ft: about 7.1 football fields. 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.

Built1967rebuilt 1998
Length2551.8 ft777.8 m
Daily traffic12,500counted 2023
Last inspectedDecember 2024every 24 months

Location

StateMississippi
CountyRankin
LocationI 55 Over US 80
CarriesI 55
CrossesUS 80/kcs Rr
Coordinates32.27925, -90.17329

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length2551.8 ft (777.8 m)
Max Span69.9 ft (21.3 m)
Deck Width74.8 ft (22.8 m)
Deck Area17733.8 sq m
Main Spans42
Year Built1967 (reconstructed 1998)

Traffic

Avg Daily Traffic12,500 (2023)
Truck Traffic8%
Lanes On Bridge5
Lanes Under Bridge4

Inspection & Ownership

Last InspectionDecember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number11000550610934B

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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