US Bridges

LA0811 over L Dugdemona River

Fair

Jackson Parish, Louisiana · 3.5 MI North of LA 812 · Structure no. 052508250905011

Built
1948
77 years old
Condition
Fair
inspected July 2024
Type
Tee Beam
Concrete
Length
101 ft
5 main spans
Daily traffic
455
2021 count
Owner
State
State Highway Agency

About this bridge

LA0811 over L Dugdemona River is a concrete tee beam carrying LA0811 over L Dugdemona River in Jackson Parish, Louisiana. It was built in 1948, so it is 77 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.

It carries about 455 vehicles a day, roughly 19% of them trucks, projected to reach 500 by 2041. The structure is 101 ft (30.8 m) long and 25 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesLA0811
CrossesL Dugdemona River
Location3.5 MI North of LA 812
RouteState Highway 811
CountyJackson Parish
StateLouisiana
Coordinates32.29748, -92.642
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to 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 rating65 US tons
Inventory rating39 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadH 15
Structure length101 ft (30.8 m)
Longest span20 ft (6.1 m)
Deck width25 ft (7.7 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic455 (2021)
Projected traffic500 by 2041
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 LA0811 over L Dugdemona River built?

It was built in 1948, making it 77 years old in 2025.

What condition is LA0811 over L Dugdemona 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 July 2024.

How much traffic does LA0811 over L Dugdemona River carry?

About 455 vehicles per day (2021 count), of which roughly 19% are trucks.

How long is LA0811 over L Dugdemona River?

The structure is 101 ft (30.8 m) long with a longest span of 20 ft (6.1 m) and a deck 25 ft wide.

Who owns LA0811 over L Dugdemona River?

It is owned by the State Highway Agency.