US Bridges

LA0450 over Drain

Good

Washington Parish, Louisiana · 4 Mi. N of Par LINE/LA450 · Structure no. 625908590304011

Built
2006
19 years old
Condition
Good
inspected May 2024
Type
Slab
Concrete
Length
38 ft
2 main spans
Daily traffic
1,822
2021 count
Owner
State
State Highway Agency

About this bridge

LA0450 over Drain is a concrete slab carrying LA0450 over Drain in Washington Parish, Louisiana. It was built in 2006, so it is 19 years old, younger 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 1,822 vehicles a day, roughly 13% of them trucks, projected to reach 2,004 by 2041. The structure is 38 ft (11.6 m) long and 31 ft wide. If it were closed, the detour would be 34.8 mi (56 km).

CarriesLA0450
CrossesDrain
Location4 Mi. N of Par LINE/LA450
RouteState Highway 450
Coordinates30.76002, -90.2489
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 rating62.8 US tons
Inventory rating48.6 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length38 ft (11.6 m)
Longest span19 ft (5.8 m)
Deck width31 ft (9.3 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,822 (2021)
Projected traffic2,004 by 2041
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed34.8 mi (56 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0450 over Drain built?

It was built in 2006, making it 19 years old in 2025.

What condition is LA0450 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 May 2024.

How much traffic does LA0450 over Drain carry?

About 1,822 vehicles per day (2021 count), of which roughly 13% are trucks.

How long is LA0450 over Drain?

The structure is 38 ft (11.6 m) long with a longest span of 19 ft (5.8 m) and a deck 31 ft wide.

Who owns LA0450 over Drain?

It is owned by the State Highway Agency.