Structure 410005504303580 · Lincoln County, MS

Katie Dunn Road over I 55

Carries Katie Dunn Road over I 55, 11.4 Mi N Pike Cl.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 8 of 9.

How ratings work
Decksets the rating8/9 · Very Good
Superstructuresets the rating8/9 · Very Good
Substructuresets the rating8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT384 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 8/9

384 ft end to end, longest span 70 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.

Built196660 years old
Length383.9 ft117 m
Daily traffic190counted 2023
Last inspectedJanuary 2025every 24 months

Location

StateMississippi
CountyLincoln
Location11.4 Mi N Pike Cl
CarriesKatie Dunn Road
CrossesI 55
Coordinates31.51714, -90.47955

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length383.9 ft (117 m)
Max Span69.9 ft (21.3 m)
Deck Width28.9 ft (8.8 m)
Deck Area1029.6 sq m
Main Spans4
Year Built1966

Traffic

Avg Daily Traffic190 (2023)
Truck Traffic10%
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 Number410005504303580

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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