US Bridges

LA0155 over Dugdemona River

Fair

Jackson Parish, Louisiana · 1.69 MI West of US 167 · Structure no. 052500900601601

Built
1981
44 years old
Condition
Fair
inspected April 2024
Type
Slab
Concrete
Length
400 ft
20 main spans
Daily traffic
1,222
2021 count
Owner
State
State Highway Agency

About this bridge

LA0155 over Dugdemona River is a concrete slab carrying LA0155 over Dugdemona River in Jackson Parish, Louisiana. It was built in 1981, so it is 44 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 6 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 1,222 vehicles a day, roughly 15% of them trucks, projected to reach 1,344 by 2041. The structure is 400 ft (121.9 m) long and 33 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

Open in Google Maps
CarriesLA0155
CrossesDugdemona River
Location1.69 MI West of US 167
RouteState Highway 155
CountyJackson Parish
StateLouisiana
Coordinates32.34415, -92.7481
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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 rating75 US tons
Inventory rating45 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans20
Design loadHS 20
Structure length400 ft (121.9 m)
Longest span20 ft (6.1 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,222 (2021)
Projected traffic1,344 by 2041
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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 LA0155 over Dugdemona River built?

It was built in 1981, making it 44 years old in 2025.

What condition is LA0155 over 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 April 2024.

How much traffic does LA0155 over Dugdemona River carry?

About 1,222 vehicles per day (2021 count), of which roughly 15% are trucks.

How long is LA0155 over Dugdemona River?

The structure is 400 ft (121.9 m) long with a longest span of 20 ft (6.1 m) and a deck 33 ft wide.

Who owns LA0155 over Dugdemona River?

It is owned by the State Highway Agency.