US Bridges

LA0315 over Falgout Canal

Poor

Terrebonne Parish, Louisiana · 11.0 MI South of LA 661 · Structure no. 025502450207341

Built
1964
61 years old
Condition
Poor
inspected November 2024
Type
Movable - Swing
Steel
Length
202 ft
1 main span
Daily traffic
2,378
2021 count
Owner
State
State Highway Agency

About this bridge

LA0315 over Falgout Canal is a steel movable - swing carrying LA0315 over Falgout Canal 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 poor condition with a lowest component rating of 4 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.

It carries about 2,378 vehicles a day, roughly 12% of them trucks, projected to reach 2,615 by 2041. The structure is 202 ft (61.6 m) long and 34 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesLA0315
CrossesFalgout Canal
Location11.0 MI South of LA 661
RouteState Highway 315
CountyTerrebonne Parish
StateLouisiana
Coordinates29.41173, -90.7832
Functional classRural Minor 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
Deck7 GoodSome minor problems.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
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 rating29.3 US tons
Inventory rating22.5 US tons

Structure

Structure typeMovable - Swing
MaterialSteel
DeckOpen grating
Main spans1 (+3 approach)
Design loadH 15
Structure length202 ft (61.6 m)
Longest span135 ft (41.1 m)
Deck width34 ft (10.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deck16 ft (4.8 m)

Traffic and service

Average daily traffic2,378 (2021)
Projected traffic2,615 by 2041
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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$904,000
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was LA0315 over Falgout Canal built?

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

What condition is LA0315 over Falgout Canal 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 November 2024.

How much traffic does LA0315 over Falgout Canal carry?

About 2,378 vehicles per day (2021 count), of which roughly 12% are trucks.

How long is LA0315 over Falgout Canal?

The structure is 202 ft (61.6 m) long with a longest span of 135 ft (41.1 m) and a deck 34 ft wide.

Who owns LA0315 over Falgout Canal?

It is owned by the State Highway Agency.