Structure 52500670500001 · Jackson County, LA

La0004 over Dugdemona River

Carries La0004 over Dugdemona River, 6.28 Mi West Of US 167.

Overall conditionFair

Set by its lowest-rated component: Substructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT497 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

497 ft end to end, longest span 45 ft: about 7 semi-trucks nose to tail. 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.

Built197650 years old
Length497.0 ft151.5 m
Daily traffic3,086counted 2021
Last inspectedApril 2024every 24 months

Location

StateLouisiana
CountyJackson
Location6.28 Mi West Of US 167
CarriesLa0004
CrossesDugdemona River
Coordinates32.20714, -92.80160

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length497.0 ft (151.5 m)
Max Span44.9 ft (13.7 m)
Deck Width43.3 ft (13.2 m)
Deck Area1999.8 sq m
Main Spans11
Year Built1976

Traffic

Avg Daily Traffic3,086 (2021)
Truck Traffic15%
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical3 — Scour critical
Structure Number052500670500001

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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