US Bridges

LA8133 over L Dugdemona River

Fair

Jackson Parish, Louisiana · 1.71 MI East of US 167 · Structure no. 052508250301711

Built
1973
52 years old
Condition
Fair
inspected July 2024
Type
Slab
Concrete
Length
114 ft
6 main spans
Daily traffic
434
2021 count
Owner
State
State Highway Agency

About this bridge

LA8133 over L Dugdemona River is a concrete slab carrying LA8133 over L Dugdemona River in Jackson Parish, Louisiana. It was built in 1973, so it is 52 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 434 vehicles a day, roughly 19% of them trucks, projected to reach 477 by 2041. The structure is 114 ft (34.7 m) long and 31 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesLA8133
CrossesL Dugdemona River
Location1.71 MI East of US 167
RouteState Highway 8133
CountyJackson Parish
StateLouisiana
Coordinates32.27243, -92.6954
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating72 US tons
Inventory rating43 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans6
Design loadHS 20
Structure length114 ft (34.7 m)
Longest span19 ft (5.8 m)
Deck width31 ft (9.6 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic434 (2021)
Projected traffic477 by 2041
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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$556,000
NavigationNo navigation control on waterway

Frequently asked questions

When was LA8133 over L Dugdemona River built?

It was built in 1973, making it 52 years old in 2025.

What condition is LA8133 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 LA8133 over L Dugdemona River carry?

About 434 vehicles per day (2021 count), of which roughly 19% are trucks.

How long is LA8133 over L Dugdemona River?

The structure is 114 ft (34.7 m) long with a longest span of 19 ft (5.8 m) and a deck 31 ft wide.

Who owns LA8133 over L Dugdemona River?

It is owned by the State Highway Agency.