US Bridges

LA1151 over Drain

Poor

Allen Parish, Louisiana · 2.0 W of US 165 · Structure no. 070208020402451

Built
1965
60 years old
Condition
Poor
inspected January 2024
Type
Culvert
Steel
Length
32 ft
3 main spans
Daily traffic
482
2021 count
Owner
State
State Highway Agency

About this bridge

LA1151 over Drain is a steel culvert carrying LA1151 over Drain in Allen Parish, Louisiana. It was built in 1965, so it is 60 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.

It carries about 482 vehicles a day, roughly 11% of them trucks, projected to reach 530 by 2041. The structure is 32 ft (9.8 m) long and 55 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesLA1151
CrossesDrain
Location2.0 W of US 165
RouteState Highway 1151
Coordinates30.60712, -92.7936
Functional classRural Local

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
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Last inspectionJanuary 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating107.1 US tons
Inventory rating82.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span9 ft (2.7 m)
Deck width55 ft (16.8 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic482 (2021)
Projected traffic530 by 2041
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 LA1151 over Drain built?

It was built in 1965, making it 60 years old in 2025.

What condition is LA1151 over Drain 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 January 2024.

How much traffic does LA1151 over Drain carry?

About 482 vehicles per day (2021 count), of which roughly 11% are trucks.

How long is LA1151 over Drain?

The structure is 32 ft (9.8 m) long with a longest span of 9 ft (2.7 m) and a deck 55 ft wide.

Who owns LA1151 over Drain?

It is owned by the State Highway Agency.