Structure 25500659121701 · Terrebonne County, LA

La0024 over Sprr & La 20

Carries La0024 over Sprr & La 20, La0024.

Overall conditionFair

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

How ratings work
Deck6/9 · Satisfactory
Superstructure7/9 · Good
Substructuresets the rating5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT2,172 FT OVERALL250 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 7/9Substructure 5/9 · sets the rating

2,172 ft end to end, longest span 70 ft: about 6.0 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.

Built197056 years old
Length2171.9 ft662 m
Daily traffic28,505counted 2021
Last inspectedNovember 2023every 24 months

Location

StateLouisiana
CountyTerrebonne
LocationLa0024
CarriesLa0024
CrossesSprr & La 20
Coordinates29.74513, -90.81130

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length2171.9 ft (662 m)
Max Span69.9 ft (21.3 m)
Deck Width65.3 ft (19.9 m)
Deck Area13173.8 sq m
Main Spans31
Year Built1970

Traffic

Avg Daily Traffic28,505 (2021)
Truck Traffic10%
Lanes On Bridge4
Lanes Under Bridge4

Inspection & Ownership

Last InspectionNovember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number025500659121701

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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