US Bridges

Lake RD over Lacombe Bayou

FairPosted for load

St. Tammany Parish, Louisiana · 1080M South of LA 434 · Structure no. 625230160895741

Built
1992
33 years old
Condition
Fair
inspected November 2024
Type
Slab
Concrete
Length
40 ft
2 main spans
Daily traffic
100
1992 count
Owner
County
County Highway Agency

About this bridge

Lake RD over Lacombe Bayou is a concrete slab carrying Lake RD over Lacombe Bayou in St. Tammany Parish, Louisiana. It was built in 1992, so it is 33 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 100 vehicles a day, projected to reach 110 by 2012. The structure is 40 ft (12.2 m) long and 19 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesLake RD
CrossesLacombe Bayou
Location1080M South of LA 434
RouteCounty Highway 0
CountySt. Tammany Parish
StateLouisiana
Coordinates30.26811, -89.95639
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating25.7 US tons
Inventory rating20 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length40 ft (12.2 m)
Longest span19 ft (5.8 m)
Deck width19 ft (5.7 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (1992)
Projected traffic110 by 2012
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-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 statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$168,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Lake RD over Lacombe Bayou built?

It was built in 1992, making it 33 years old in 2025.

What condition is Lake RD over Lacombe 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 November 2024.

How much traffic does Lake RD over Lacombe Bayou carry?

About 100 vehicles per day (1992 count).

How long is Lake RD over Lacombe Bayou?

The structure is 40 ft (12.2 m) long with a longest span of 19 ft (5.8 m) and a deck 19 ft wide.

Who owns Lake RD over Lacombe Bayou?

It is owned by the County Highway Agency.