US Bridges

LA0324 over Bayou Teche

PoorClosed to traffic

St. Mary Parish, Louisiana · 0.1 MI West of LA 326 · Structure no. 035102410209141

Built
1941
84 years old
Condition
Poor
inspected August 2024
Type
Movable - Swing
Steel
Length
348 ft
1 main span
Daily traffic
883
2021 count
Owner
State
State Highway Agency

About this bridge

LA0324 over Bayou Teche is a steel movable - swing carrying LA0324 over Bayou Teche in St. Mary Parish, Louisiana. It was built in 1941, so it is 84 years old, older than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 1 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: closed to all traffic.

It carries about 883 vehicles a day, roughly 9% of them trucks, projected to reach 971 by 2041. The structure is 348 ft (106.1 m) long and 28 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesLA0324
CrossesBayou Teche
Location0.1 MI West of LA 326
RouteState Highway 324
Coordinates29.8871, -91.5227
Functional classUrban Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure1 Imminent FailureMajor deterioration or section loss present in critical structural components. Bridge is closed to traffic but corrective action may put it back in light service.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 12 months
Operating statusClosed to all traffic
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation0: Immediate repair necessary to put back in service
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating16.8 US tons
Inventory rating13.2 US tons

Structure

Structure typeMovable - Swing
MaterialSteel
DeckOpen grating
Main spans1 (+6 approach)
Design loadH 15
Structure length348 ft (106.1 m)
Longest span204 ft (62.2 m)
Deck width28 ft (8.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic883 (2021)
Projected traffic971 by 2041
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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$1.5 million
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was LA0324 over Bayou Teche built?

It was built in 1941, making it 84 years old in 2025.

What condition is LA0324 over Bayou Teche in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2024.

How much traffic does LA0324 over Bayou Teche carry?

About 883 vehicles per day (2021 count), of which roughly 9% are trucks.

How long is LA0324 over Bayou Teche?

The structure is 348 ft (106.1 m) long with a longest span of 204 ft (62.2 m) and a deck 28 ft wide.

Who owns LA0324 over Bayou Teche?

It is owned by the State Highway Agency.