Structure 46004510307182 · Webster County, LA

I0020 over Dorcheat Bayou

Carries I0020 over Dorcheat Bayou, 0.84m East Of La 7.

Overall conditionFair

Set by its lowest-rated component: Substructure at 5 of 9.

How ratings work
Deck7/9 · Good
Superstructure8/9 · Very Good
Substructuresets the rating5/9 · Fair
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT600 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 8/9Substructure 5/9 · sets the rating

600 ft end to end, longest span 60 ft: about 1.7 football fields. 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.

Built1960rebuilt 1993
Length600.1 ft182.9 m
Daily traffic38,625counted 2021
Last inspectedSeptember 2023every 24 months

Location

StateLouisiana
CountyWebster
Location0.84m East Of La 7
CarriesI0020
CrossesDorcheat Bayou
Coordinates32.59432, -93.32120

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignStringer/Multi-beam
Total Length600.1 ft (182.9 m)
Max Span60.0 ft (18.3 m)
Deck Width42.7 ft (13 m)
Deck Area2377.7 sq m
Main Spans10
Year Built1960 (reconstructed 1993)

Traffic

Avg Daily Traffic38,625 (2021)
Truck Traffic19%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical3 — Scour critical
Structure Number046004510307182

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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