Structure SA3800000000209 · Lauderdale County, MS

Knox Road over Toomsuba Creek

Carries Knox Road over Toomsuba Creek, Sec 22 T 7n R17e B.

Overall conditionGood

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

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructure8/9 · Very Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT60 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 7/9 · sets the ratingSubstructure 8/9

60 ft end to end. Lengths and the car 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.

Built198937 years old
Length60.0 ft18.3 m
Daily traffic181counted 2023
Last inspectedOctober 2023every 24 months

Location

StateMississippi
CountyLauderdale
LocationSec 22 T 7n R17e B
CarriesKnox Road
CrossesToomsuba Creek
Coordinates32.43545, -88.54956

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length60.0 ft (18.3 m)
Max Span58.1 ft (17.7 m)
Deck Width30.5 ft (9.3 m)
Deck Area170.2 sq m
Main Spans1
Year Built1989

Traffic

Avg Daily Traffic181 (2023)
Truck Traffic8%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure NumberSA3800000000209

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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