US Bridges

N Carpenters Br RD over Flat Creek Relief

Good

Allen Parish, Louisiana · 3.7 MI South of LA 26 · Structure no. 070200000500934

Built
2010
15 years old
Condition
Good
inspected September 2023
Type
Slab
Concrete
Length
80 ft
4 main spans
Daily traffic
250
2019 count
Owner
County
County Highway Agency

About this bridge

N Carpenters Br RD over Flat Creek Relief is a concrete slab carrying N Carpenters Br RD over Flat Creek Relief in Allen Parish, Louisiana. It was built in 2010, so it is 15 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 250 vehicles a day, projected to reach 275 by 2039. The structure is 80 ft (24.4 m) long and 27 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesN Carpenters Br RD
CrossesFlat Creek Relief
Location3.7 MI South of LA 26
RouteCounty Highway 0
Coordinates30.66752, -92.92749
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating33.6 US tons
Inventory rating25.7 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length80 ft (24.4 m)
Longest span20 ft (6.1 m)
Deck width27 ft (8.1 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2019)
Projected traffic275 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed1.2 mi (2 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was N Carpenters Br RD over Flat Creek Relief built?

It was built in 2010, making it 15 years old in 2025.

What condition is N Carpenters Br RD over Flat Creek Relief 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 September 2023.

How much traffic does N Carpenters Br RD over Flat Creek Relief carry?

About 250 vehicles per day (2019 count).

How long is N Carpenters Br RD over Flat Creek Relief?

The structure is 80 ft (24.4 m) long with a longest span of 20 ft (6.1 m) and a deck 27 ft wide.

Who owns N Carpenters Br RD over Flat Creek Relief?

It is owned by the County Highway Agency.