Structure 11000550430375B · Lincoln County, MS

I 55 over US 84

Carries I 55 over US 84, I 55 Over US 84.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructure8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT293 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 8/9

293 ft end to end, longest span 83 ft: about 4 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.

Built196660 years old
Length293.0 ft89.3 m
Daily traffic10,500counted 2023
Last inspectedJanuary 2025every 24 months

Location

StateMississippi
CountyLincoln
LocationI 55 Over US 84
CarriesI 55
CrossesUS 84
Coordinates31.54200, -90.47969

Physical Characteristics

MaterialConcrete Continuous
DesignBox Beam - Single/Spread
Total Length293.0 ft (89.3 m)
Max Span83.0 ft (25.3 m)
Deck Width44.9 ft (13.7 m)
Deck Area1223.4 sq m
Main Spans2
Year Built1966

Traffic

Avg Daily Traffic10,500 (2023)
Truck Traffic23%
Lanes On Bridge20
Lanes Under Bridge4

Inspection & Ownership

Last InspectionJanuary 2025
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number11000550430375B

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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