Structure 35030046914731 · St. Martin County, LA

Division RD over Coulee Du Portage

Carries Division RD over Coulee Du Portage, 0.2 Miles NE Of La 680.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 4 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
Substructuresets the rating4/9 · Poor
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT39 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 4/9 · sets the rating

39 ft end to end, longest span 19 ft. 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 or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built196561 years old
Length39.0 ft11.9 m
Daily traffic129counted 2020
Last inspectedOctober 2024every 12 months

Location

StateLouisiana
CountySt. Martin
Location0.2 Miles NE Of La 680
CarriesDivision RD
CrossesCoulee Du Portage
Coordinates30.07806, -91.78951

Physical Characteristics

MaterialWood or Timber
DesignStringer/Multi-beam
Total Length39.0 ft (11.9 m)
Max Span19.0 ft (5.8 m)
Deck Width25.6 ft (7.8 m)
Deck Area92.8 sq m
Main Spans2
Year Built1965

Traffic

Avg Daily Traffic129 (2020)
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 12 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalUnknown
Structure Number035030046914731

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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