US Bridges

LA0001 over Prairie River

FairPosted for load

Caddo Parish, Louisiana · 2.6 MI South of LA 175 · Structure no. 040900530807631

Built
1956
69 years old
Condition
Fair
inspected February 2024
Type
Slab
Concrete
Length
160 ft
8 main spans
Daily traffic
1,869
2021 count
Owner
State
State Highway Agency

About this bridge

LA0001 over Prairie River is a concrete slab carrying LA0001 over Prairie River in Caddo Parish, Louisiana. It was built in 1956, so it is 69 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 1,869 vehicles a day, roughly 19% of them trucks, projected to reach 2,055 by 2041. The structure is 160 ft (48.8 m) long and 33 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesLA0001
CrossesPrairie River
Location2.6 MI South of LA 175
RouteState Highway 1
CountyCaddo Parish
StateLouisiana
Coordinates32.31497, -93.5867
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
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 rating24.3 US tons
Inventory rating18.5 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans8
Design loadHS 20
Structure length160 ft (48.8 m)
Longest span20 ft (6.1 m)
Deck width33 ft (10.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,869 (2021)
Projected traffic2,055 by 2041
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$741,000
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0001 over Prairie River built?

It was built in 1956, making it 69 years old in 2025.

What condition is LA0001 over Prairie 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 February 2024.

How much traffic does LA0001 over Prairie River carry?

About 1,869 vehicles per day (2021 count), of which roughly 19% are trucks.

How long is LA0001 over Prairie River?

The structure is 160 ft (48.8 m) long with a longest span of 20 ft (6.1 m) and a deck 33 ft wide.

Who owns LA0001 over Prairie River?

It is owned by the State Highway Agency.