US Bridges

Chauvin Bridge RD over Petit Caillou Bayou

FairPosted for load

Terrebonne Parish, Louisiana · 0.02 MI SW of LA 56 · Structure no. 025529256903601

Built
2011
14 years old
Condition
Fair
inspected June 2023
Type
Movable - Swing
Steel
Length
160 ft
2 main spans
Daily traffic
720
2021 count
Owner
County
County Highway Agency

About this bridge

Chauvin Bridge RD over Petit Caillou Bayou is a steel movable - swing carrying Chauvin Bridge RD over Petit Caillou Bayou in Terrebonne Parish, Louisiana. It was built in 2011, so it is 14 years old, younger 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. Its operating status is: posted for load restriction.

It carries about 720 vehicles a day, projected to reach 792 by 2041. The structure is 160 ft (48.8 m) long and 22 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesChauvin Bridge RD
CrossesPetit Caillou Bayou
Location0.02 MI SW of LA 56
RouteCounty Highway 0
CountyTerrebonne Parish
StateLouisiana
Coordinates29.42692, -90.5999
Functional classRural Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating15.8 US tons
Inventory rating12.1 US tons

Structure

Structure typeMovable - Swing
MaterialSteel
DeckWood or timber
Main spans2 (+2 approach)
Design loadH 10
Structure length160 ft (48.8 m)
Longest span130 ft (39.6 m)
Deck width22 ft (6.8 m)
Roadway width21 ft (6.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic720 (2021)
Projected traffic792 by 2041
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$514,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Chauvin Bridge RD over Petit Caillou Bayou built?

It was built in 2011, making it 14 years old in 2025.

What condition is Chauvin Bridge RD over Petit Caillou Bayou 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 June 2023.

How much traffic does Chauvin Bridge RD over Petit Caillou Bayou carry?

About 720 vehicles per day (2021 count).

How long is Chauvin Bridge RD over Petit Caillou Bayou?

The structure is 160 ft (48.8 m) long with a longest span of 130 ft (39.6 m) and a deck 22 ft wide.

Who owns Chauvin Bridge RD over Petit Caillou Bayou?

It is owned by the County Highway Agency.