US Bridges

LA0014 over Mermentau River

Fair

Vermilion Parish, Louisiana · 1.2 MI N. of LA 717 · Structure no. 035700550100001

Built
1976
49 years old
Condition
Fair
inspected March 2024
Type
Girder and Floorbeam System
Steel Continuous
Length
3,616 ft
5 main spans
Daily traffic
1,717
2021 count
Owner
State
State Highway Agency

About this bridge

LA0014 over Mermentau River is a steel continuous girder and floorbeam system carrying LA0014 over Mermentau River in Vermilion Parish, Louisiana. It was built in 1976, so it is 49 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 6 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 1,717 vehicles a day, roughly 13% of them trucks, projected to reach 1,888 by 2041. The structure is 3,616 ft (1,102.2 m) long and 34 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesLA0014
CrossesMermentau River
Location1.2 MI N. of LA 717
RouteState Highway 14
CountyVermilion Parish
StateLouisiana
Coordinates30.07493, -92.6637
Functional classRural Major 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57 US tons
Inventory rating34 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5 (+43 approach)
Design loadHS 20
Structure length3,616 ft (1,102.2 m)
Longest span300 ft (91.4 m)
Deck width34 ft (10.3 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,717 (2021)
Projected traffic1,888 by 2041
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedNone recorded
Estimated improvement cost—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was LA0014 over Mermentau River built?

It was built in 1976, making it 49 years old in 2025.

What condition is LA0014 over Mermentau River 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 March 2024.

How much traffic does LA0014 over Mermentau River carry?

About 1,717 vehicles per day (2021 count), of which roughly 13% are trucks.

How long is LA0014 over Mermentau River?

The structure is 3,616 ft (1,102.2 m) long with a longest span of 300 ft (91.4 m) and a deck 34 ft wide.

Who owns LA0014 over Mermentau River?

It is owned by the State Highway Agency.