Structure 110011002400010 · Harrison County, MS

I 110 over L&n Rr And Keegan Bayou

Carries I 110 over L&n Rr And Keegan Bayou, 0.1 Mi N US 90.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
5,303 FT OVERALL1,000 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

5,303 ft end to end, longest span 130 ft: about 15 football fields, or 1.0 miles. Lengths are drawn to scale; at this length a semi-truck would be a speck. 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 segmental box-girder bridge.

Built198838 years old
Length5303.1 ft1616.4 m
Daily traffic24,000counted 2023
Last inspectedDecember 2023every 24 months

Location

StateMississippi
CountyHarrison
Location0.1 Mi N US 90
CarriesI 110
CrossesL&n Rr And Keegan Bayou
Coordinates30.39637, -88.89434

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignSegmental Box Girder
Total Length5303.1 ft (1616.4 m)
Max Span129.9 ft (39.6 m)
Deck Width82.7 ft (25.2 m)
Deck Area40733.3 sq m
Main Spans44
Year Built1988

Traffic

Avg Daily Traffic24,000 (2023)
Truck Traffic2%
Lanes On Bridge4
Lanes Under Bridge10

Inspection & Ownership

Last InspectionDecember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number110011002400010

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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