Structure 14530 · Marengo County, AL

US 43 over Whitfield Canal

Carries US 43 over Whitfield Canal, Demopolis.

Overall conditionGood

Set by its lowest-rated component: Culvert at 7 of 9.

How ratings work
Culvertsets the rating7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT26 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 7/9

A culvert 26 ft across with 2 openings. 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, so those are drawn as typical for a culvert.

Built198838 years old
Length26.2 ft8 m
Daily traffic7,830counted 2013
Last inspectedJuly 2023every 24 months

Location

StateAlabama
CountyMarengo
LocationDemopolis
CarriesUS 43
CrossesWhitfield Canal
Coordinates32.50584, -87.83530

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length26.2 ft (8 m)
Max Span12.1 ft (3.7 m)
Deck Width44.0 ft (13.4 m)
Deck Area107.2 sq m
Main Spans2
Year Built1988

Traffic

Avg Daily Traffic7,830 (2013)
Truck Traffic9%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number014530

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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