US Bridges

LA0155 over Cypress Bayou Relief

Fair

Jackson Parish, Louisiana · 0.3 Miles East of US 167 · Structure no. 052500230615021

Built
1976
49 years old
Condition
Fair
inspected June 2024
Type
Slab
Concrete
Length
120 ft
6 main spans
Daily traffic
1,605
2021 count
Owner
State
State Highway Agency

About this bridge

LA0155 over Cypress Bayou Relief is a concrete slab carrying LA0155 over Cypress Bayou Relief in Jackson Parish, Louisiana. It was built in 1976, so it is 49 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 1,605 vehicles a day, roughly 15% of them trucks, projected to reach 1,765 by 2041. The structure is 120 ft (36.6 m) long and 43 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesLA0155
CrossesCypress Bayou Relief
Location0.3 Miles East of US 167
RouteState Highway 155
CountyJackson Parish
StateLouisiana
Coordinates32.34486, -92.7107
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length120 ft (36.6 m)
Longest span20 ft (6.1 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,605 (2021)
Projected traffic1,765 by 2041
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed8.7 mi (14 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0155 over Cypress Bayou Relief built?

It was built in 1976, making it 49 years old in 2025.

What condition is LA0155 over Cypress Bayou Relief 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 June 2024.

How much traffic does LA0155 over Cypress Bayou Relief carry?

About 1,605 vehicles per day (2021 count), of which roughly 15% are trucks.

How long is LA0155 over Cypress Bayou Relief?

The structure is 120 ft (36.6 m) long with a longest span of 20 ft (6.1 m) and a deck 43 ft wide.

Who owns LA0155 over Cypress Bayou Relief?

It is owned by the State Highway Agency.