US Bridges

Lamkin RD over Cypress Bayou

Fair

Jackson Parish, Louisiana · .3 MI East Int. 076 · Structure no. 052532237924111

Built
1999
26 years old
Condition
Fair
inspected February 2024
Type
Slab
Concrete
Length
118 ft
6 main spans
Daily traffic
85
2020 count
Owner
County
County Highway Agency

About this bridge

Lamkin RD over Cypress Bayou is a concrete slab carrying Lamkin RD over Cypress Bayou in Jackson 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 85 vehicles a day, projected to reach 93 by 2040. The structure is 118 ft (36 m) long and 27 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesLamkin RD
CrossesCypress Bayou
Location.3 MI East Int. 076
RouteCounty Highway 0
CountyJackson Parish
StateLouisiana
Coordinates32.39587, -92.68697
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating50 US tons
Inventory rating38.6 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length118 ft (36 m)
Longest span20 ft (6.1 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic85 (2020)
Projected traffic93 by 2040
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 Lamkin RD over Cypress Bayou built?

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

What condition is Lamkin RD over Cypress 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 February 2024.

How much traffic does Lamkin RD over Cypress Bayou carry?

About 85 vehicles per day (2020 count).

How long is Lamkin RD over Cypress Bayou?

The structure is 118 ft (36 m) long with a longest span of 20 ft (6.1 m) and a deck 27 ft wide.

Who owns Lamkin RD over Cypress Bayou?

It is owned by the County Highway Agency.