Structure 32308233101331 · Iberia County, LA

La0680 over Coulee Du Portage

Carries La0680 over Coulee Du Portage, 1.33 Mi North Of La 86.

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
23 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 7/9

A culvert 23 ft across with 3 openings. Lengths are drawn to scale; at this length a semi-truck would be a speck. 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.

Built197155 years old
Length23.0 ft7 m
Daily traffic923counted 2021
Last inspectedAugust 2023every 24 months

Location

StateLouisiana
CountyIberia
Location1.33 Mi North Of La 86
CarriesLa0680
CrossesCoulee Du Portage
Coordinates30.07613, -91.79100

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length23.0 ft (7 m)
Max Span6.9 ft (2.1 m)
Deck Width53.1 ft (16.2 m)
Deck Area113.4 sq m
Main Spans3
Year Built1971

Traffic

Avg Daily Traffic923 (2021)
Truck Traffic9%
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical7 — Countermeasures installed
Structure Number032308233101331

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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