US Bridges

LA0320 over Teche Bayou/Olivier

PoorPosted for load

Iberia Parish, Louisiana · 0.2 Mi. N. of LA 182 · Structure no. 032308231200171

Built
1963
62 years old
Condition
Poor
inspected February 2024
Type
Movable - Swing
Steel
Length
263 ft
2 main spans
Daily traffic
3,241
2021 count
Owner
State
State Highway Agency

About this bridge

LA0320 over Teche Bayou/Olivier is a steel movable - swing carrying LA0320 over Teche Bayou/Olivier in Iberia Parish, Louisiana. It was built in 1963, so it is 62 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 3 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: posted for load restriction.

It carries about 3,241 vehicles a day, roughly 9% of them trucks, projected to reach 3,565 by 2041. The structure is 263 ft (80.2 m) long and 31 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesLA0320
CrossesTeche Bayou/Olivier
Location0.2 Mi. N. of LA 182
RouteState Highway 320
CountyIberia Parish
StateLouisiana
Coordinates29.97882, -91.7539
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating17.2 US tons
Inventory rating13.2 US tons

Structure

Structure typeMovable - Swing
MaterialSteel
DeckOpen grating
Main spans2 (+4 approach)
Design loadHS 20
Structure length263 ft (80.2 m)
Longest span183 ft (55.8 m)
Deck width31 ft (9.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deck18 ft (5.5 m)

Traffic and service

Average daily traffic3,241 (2021)
Projected traffic3,565 by 2041
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.1 million
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was LA0320 over Teche Bayou/Olivier built?

It was built in 1963, making it 62 years old in 2025.

What condition is LA0320 over Teche Bayou/Olivier 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 February 2024.

How much traffic does LA0320 over Teche Bayou/Olivier carry?

About 3,241 vehicles per day (2021 count), of which roughly 9% are trucks.

How long is LA0320 over Teche Bayou/Olivier?

The structure is 263 ft (80.2 m) long with a longest span of 183 ft (55.8 m) and a deck 31 ft wide.

Who owns LA0320 over Teche Bayou/Olivier?

It is owned by the State Highway Agency.