US Bridges

LA1056 over Drain

Good

Washington Parish, Louisiana · 0.6 M E of LA 450 · Structure no. 625908590600701

Built
1966
59 years old
Condition
Good
inspected July 2024
Type
Culvert
Concrete
Length
22 ft
4 main spans
Daily traffic
1,085
2021 count
Owner
State
State Highway Agency

About this bridge

LA1056 over Drain is a concrete culvert carrying LA1056 over Drain in Washington Parish, Louisiana. It was built in 1966, so it is 59 years old, older than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,085 vehicles a day, roughly 13% of them trucks, projected to reach 1,193 by 2041. The structure is 22 ft (6.7 m) long and 54 ft wide.

CarriesLA1056
CrossesDrain
Location0.6 M E of LA 450
RouteState Highway 1056
Coordinates30.90385, -90.3092
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating34 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadH 15
Structure length22 ft (6.7 m)
Longest span5 ft (1.5 m)
Deck width54 ft (16.5 m)
Roadway width21 ft (6.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,085 (2021)
Projected traffic1,193 by 2041
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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$163,000
NavigationNo navigation control on waterway

Frequently asked questions

When was LA1056 over Drain built?

It was built in 1966, making it 59 years old in 2025.

What condition is LA1056 over Drain in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2024.

How much traffic does LA1056 over Drain carry?

About 1,085 vehicles per day (2021 count), of which roughly 13% are trucks.

How long is LA1056 over Drain?

The structure is 22 ft (6.7 m) long with a longest span of 5 ft (1.5 m) and a deck 54 ft wide.

Who owns LA1056 over Drain?

It is owned by the State Highway Agency.