Structure 40900850107411 · Caddo County, LA

La0530 over Dooley Bayou

Carries La0530 over Dooley Bayou, 7.41 Mi West Of La 1.

Overall conditionGood

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

How ratings work
Culvertsets the rating7/9 · Good
Channelnot part of overall7/9 · 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. 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.

Built198046 years old
Length25.9 ft7.9 m
Daily traffic177counted 2021
Last inspectedJanuary 2025every 24 months

Location

StateLouisiana
CountyCaddo
Location7.41 Mi West Of La 1
CarriesLa0530
CrossesDooley Bayou
Coordinates32.76073, -93.85400

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length25.9 ft (7.9 m)
Max Span25.9 ft (7.9 m)
Deck Width44.0 ft (13.4 m)
Deck Area105.9 sq m
Main Spans1
Year Built1980

Traffic

Avg Daily Traffic177 (2021)
Truck Traffic19%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJanuary 2025
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number040900850107411

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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