Structure 51808180105571 · East Carroll County, LA

La0580 over Tensas Bayou

Carries La0580 over Tensas Bayou, 2.0 Mi East Of La 877.

Overall conditionPoor

Set by its lowest-rated component: Deck at 3 of 9.

How ratings work
Decksets the rating3/9 · Serious
Superstructure5/9 · Fair
Substructure4/9 · Poor
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT133 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 3/9 · sets the ratingSuperstructure 5/9Substructure 4/9

133 ft end to end, longest span 19 ft. 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.

Built195868 years old
Length132.9 ft40.5 m
Daily traffic268counted 2021
Last inspectedMarch 2024every 12 months

Location

StateLouisiana
CountyEast Carroll
Location2.0 Mi East Of La 877
CarriesLa0580
CrossesTensas Bayou
Coordinates32.61170, -91.29740

Physical Characteristics

MaterialWood or Timber
DesignStringer/Multi-beam
Total Length132.9 ft (40.5 m)
Max Span19.0 ft (5.8 m)
Deck Width25.9 ft (7.9 m)
Deck Area319.9 sq m
Main Spans7
Year Built1958

Traffic

Avg Daily Traffic268 (2021)
Truck Traffic19%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2024
Inspection FrequencyEvery 12 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical3 — Scour critical
Structure Number051808180105571

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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