US Bridges

Welcome RD over Marsh Bayou

Fair

Calcasieu Parish, Louisiana · 4.5 MI East of US 171 · Structure no. 071030239930911

Built
2004
21 years old
Condition
Fair
inspected May 2023
Type
Slab
Concrete
Length
100 ft
5 main spans
Daily traffic
182
2019 count
Owner
County
County Highway Agency

About this bridge

Welcome RD over Marsh Bayou is a concrete slab carrying Welcome RD over Marsh Bayou in Calcasieu Parish, Louisiana. It was built in 2004, so it is 21 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.

It carries about 182 vehicles a day, projected to reach 200 by 2039. The structure is 100 ft (30.5 m) long and 31 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesWelcome RD
CrossesMarsh Bayou
Location4.5 MI East of US 171
RouteCounty Highway 0
CountyCalcasieu Parish
StateLouisiana
Coordinates30.39817, -93.15214
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
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating50 US tons
Inventory rating38.6 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans5
Design loadHS 20
Structure length100 ft (30.5 m)
Longest span20 ft (6.1 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic182 (2019)
Projected traffic200 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Welcome RD over Marsh Bayou built?

It was built in 2004, making it 21 years old in 2025.

What condition is Welcome RD over Marsh 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 May 2023.

How much traffic does Welcome RD over Marsh Bayou carry?

About 182 vehicles per day (2019 count).

How long is Welcome RD over Marsh Bayou?

The structure is 100 ft (30.5 m) long with a longest span of 20 ft (6.1 m) and a deck 31 ft wide.

Who owns Welcome RD over Marsh Bayou?

It is owned by the County Highway Agency.