US Bridges

LA0377 over Drain

Fair

Allen Parish, Louisiana · 4.32 Mi. N of Int LA26 · Structure no. 070203780304321

Built
1959
66 years old
Condition
Fair
inspected March 2023
Type
Culvert
Concrete
Length
34 ft
4 main spans
Daily traffic
590
2020 count
Owner
State
State Highway Agency

About this bridge

LA0377 over Drain is a concrete culvert carrying LA0377 over Drain in Allen Parish, Louisiana. It was built in 1959, so it is 66 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 590 vehicles a day, roughly 17% of them trucks, projected to reach 649 by 2040. The structure is 34 ft (10.4 m) long and 34 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

CarriesLA0377
CrossesDrain
Location4.32 Mi. N of Int LA26
RouteState Highway 377
Coordinates30.79743, -92.9486
Functional classRural Minor 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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating44 US tons
Inventory rating34 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadH 15
Structure length34 ft (10.4 m)
Longest span8 ft (2.4 m)
Deck width34 ft (10.4 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic590 (2020)
Projected traffic649 by 2040
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0377 over Drain built?

It was built in 1959, making it 66 years old in 2025.

What condition is LA0377 over Drain 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 2023.

How much traffic does LA0377 over Drain carry?

About 590 vehicles per day (2020 count), of which roughly 17% are trucks.

How long is LA0377 over Drain?

The structure is 34 ft (10.4 m) long with a longest span of 8 ft (2.4 m) and a deck 34 ft wide.

Who owns LA0377 over Drain?

It is owned by the State Highway Agency.