US Bridges

LA1088 over Lacombe Bayou

Fair

St. Tammany Parish, Louisiana · LA1088 · Structure no. 625208521108371

Built
1974
51 years old
Condition
Fair
inspected October 2023
Type
Culvert
Steel
Length
39 ft
6 main spans
Daily traffic
9,722
2021 count
Owner
State
State Highway Agency

About this bridge

LA1088 over Lacombe Bayou is a steel culvert carrying LA1088 over Lacombe Bayou in St. Tammany Parish, Louisiana. It was built in 1974, so it is 51 years old, older 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 9,722 vehicles a day, roughly 12% of them trucks, projected to reach 10,694 by 2041. The structure is 39 ft (11.9 m) long and 62 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

Open in Google Maps
CarriesLA1088
CrossesLacombe Bayou
LocationLA1088
RouteState Highway 1088
CountySt. Tammany Parish
StateLouisiana
Coordinates30.41882, -89.9284
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating82.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans6
Design loadHS 20
Structure length39 ft (11.9 m)
Longest span6 ft (1.8 m)
Deck width62 ft (18.9 m)
Roadway width21 ft (6.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,722 (2021)
Projected traffic10,694 by 2041
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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$234,000
NavigationNo navigation control on waterway

Frequently asked questions

When was LA1088 over Lacombe Bayou built?

It was built in 1974, making it 51 years old in 2025.

What condition is LA1088 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 October 2023.

How much traffic does LA1088 over Lacombe Bayou carry?

About 9,722 vehicles per day (2021 count), of which roughly 12% are trucks.

How long is LA1088 over Lacombe Bayou?

The structure is 39 ft (11.9 m) long with a longest span of 6 ft (1.8 m) and a deck 62 ft wide.

Who owns LA1088 over Lacombe Bayou?

It is owned by the State Highway Agency.