US Bridges

Old Darbonne RD over N Tupawek Bayou

Fair

Ouachita Parish, Louisiana · 1.0 MI N of LA 616 · Structure no. 053732327920981

Built
1999
26 years old
Condition
Fair
inspected April 2024
Type
Slab
Concrete
Length
152 ft
8 main spans
Daily traffic
448
1979 count
Owner
County
County Highway Agency

About this bridge

Old Darbonne RD over N Tupawek Bayou is a concrete slab carrying Old Darbonne RD over N Tupawek Bayou in Ouachita Parish, Louisiana. It was built in 1999, so it is 26 years old, younger 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 448 vehicles a day, projected to reach 492 by 1999. The structure is 152 ft (46.3 m) long and 33 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesOld Darbonne RD
CrossesN Tupawek Bayou
Location1.0 MI N of LA 616
RouteCounty Highway 0
Coordinates32.54333, -92.1613
Functional classRural Minor Arterial

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 protection7 GoodSome minor problems.
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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating41.8 US tons
Inventory rating32.2 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans8
Design loadHS 20
Structure length152 ft (46.3 m)
Longest span19 ft (5.8 m)
Deck width33 ft (10 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic448 (1979)
Projected traffic492 by 1999
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Old Darbonne RD over N Tupawek Bayou built?

It was built in 1999, making it 26 years old in 2025.

What condition is Old Darbonne RD over N Tupawek Bayou 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 Old Darbonne RD over N Tupawek Bayou carry?

About 448 vehicles per day (1979 count).

How long is Old Darbonne RD over N Tupawek Bayou?

The structure is 152 ft (46.3 m) long with a longest span of 19 ft (5.8 m) and a deck 33 ft wide.

Who owns Old Darbonne RD over N Tupawek Bayou?

It is owned by the County Highway Agency.