US Bridges

Buncombe RD over Gilmer Bayou

Good

Caddo Parish, Louisiana · 1.0 MI SW of LA 511 · Structure no. 040932260935161

Built
1991
34 years old
Condition
Good
inspected April 2023
Type
Culvert
Concrete
Length
21 ft
1 main span
Daily traffic
2,656
1979 count
Owner
City
City or Municipal Highway Agency

About this bridge

Buncombe RD over Gilmer Bayou is a concrete culvert carrying Buncombe RD over Gilmer Bayou in Caddo Parish, Louisiana. It was built in 1991, so it is 34 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,656 vehicles a day, projected to reach 2,921 by 1999. The structure is 21 ft (6.4 m) long and 64 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesBuncombe RD
CrossesGilmer Bayou
Location1.0 MI SW of LA 511
RouteCity Street 0
CountyCaddo Parish
StateLouisiana
Coordinates32.43335, -93.85955
Functional classUrban Local

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span21 ft (6.4 m)
Deck width64 ft (19.6 m)
Roadway width36 ft (11.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,656 (1979)
Projected traffic2,921 by 1999
Trucks—
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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Buncombe RD over Gilmer Bayou built?

It was built in 1991, making it 34 years old in 2025.

What condition is Buncombe RD over Gilmer 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 2023.

How much traffic does Buncombe RD over Gilmer Bayou carry?

About 2,656 vehicles per day (1979 count).

How long is Buncombe RD over Gilmer Bayou?

The structure is 21 ft (6.4 m) long with a longest span of 21 ft (6.4 m) and a deck 64 ft wide.

Who owns Buncombe RD over Gilmer Bayou?

It is owned by the City or Municipal Highway Agency.