US Bridges

LA0058 over Petit Caillou

Fair

Terrebonne Parish, Louisiana · .01 MI East of LA 56 · Structure no. 025502473000011

Built
1964
61 years old
Condition
Fair
inspected April 2024
Type
Movable - Lift
Steel
Length
136 ft
1 main span
Daily traffic
5,194
2021 count
Owner
State
State Highway Agency

About this bridge

LA0058 over Petit Caillou is a steel movable - lift carrying LA0058 over Petit Caillou in Terrebonne Parish, Louisiana. It was built in 1964, so it is 61 years old, older than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 5,194 vehicles a day, roughly 13% of them trucks, projected to reach 5,713 by 2041. The structure is 136 ft (41.5 m) long and 30 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

Open in Google Maps
CarriesLA0058
CrossesPetit Caillou
Location.01 MI East of LA 56
RouteState Highway 58
CountyTerrebonne Parish
StateLouisiana
Coordinates29.48258, -90.5795
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating33.2 US tons
Inventory rating25.7 US tons

Structure

Structure typeMovable - Lift
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+4 approach)
Design loadH 15
Structure length136 ft (41.5 m)
Longest span55 ft (16.8 m)
Deck width30 ft (9.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deck14 ft (4.2 m)

Traffic and service

Average daily traffic5,194 (2021)
Projected traffic5,713 by 2041
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$646,000
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was LA0058 over Petit Caillou built?

It was built in 1964, making it 61 years old in 2025.

What condition is LA0058 over Petit Caillou in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2024.

How much traffic does LA0058 over Petit Caillou carry?

About 5,194 vehicles per day (2021 count), of which roughly 13% are trucks.

How long is LA0058 over Petit Caillou?

The structure is 136 ft (41.5 m) long with a longest span of 55 ft (16.8 m) and a deck 30 ft wide.

Who owns LA0058 over Petit Caillou?

It is owned by the State Highway Agency.