US Bridges

Dunbar RD over Vidal Bayou

Good

Tensas Parish, Louisiana · 0.02 MI S of LA 603 · Structure no. 585400000700607

Built
2014
11 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
200 ft
5 main spans
Daily traffic
25
2012 count
Owner
County
County Highway Agency

About this bridge

Dunbar RD over Vidal Bayou is a prestressed concrete stringer/multi-beam or girder carrying Dunbar RD over Vidal Bayou in Tensas Parish, Louisiana. It was built in 2014, so it is 11 years old, younger than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 25 vehicles a day, projected to reach 27 by 2032. The structure is 200 ft (61 m) long and 26 ft wide.

CarriesDunbar RD
CrossesVidal Bayou
Location0.02 MI S of LA 603
RouteCounty Highway 0
Coordinates32.24517, -91.16811
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating60.7 US tons
Inventory rating46.4 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length200 ft (61 m)
Longest span40 ft (12.2 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2012)
Projected traffic27 by 2032
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Dunbar RD over Vidal Bayou built?

It was built in 2014, making it 11 years old in 2025.

What condition is Dunbar RD over Vidal Bayou in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2024.

How much traffic does Dunbar RD over Vidal Bayou carry?

About 25 vehicles per day (2012 count).

How long is Dunbar RD over Vidal Bayou?

The structure is 200 ft (61 m) long with a longest span of 40 ft (12.2 m) and a deck 26 ft wide.

Who owns Dunbar RD over Vidal Bayou?

It is owned by the County Highway Agency.