US Bridges

Guillory RD over Bayou Mallet

Fair

St. Landry Parish, Louisiana · 1.0 Mi. S. of US 190 · Structure no. 034930299921701

Built
1986
39 years old
Condition
Fair
inspected January 2025
Type
Slab
Concrete
Length
134 ft
7 main spans
Daily traffic
300
2020 count
Owner
County
County Highway Agency

About this bridge

Guillory RD over Bayou Mallet is a concrete slab carrying Guillory RD over Bayou Mallet in St. Landry Parish, Louisiana. It was built in 1986, so it is 39 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 300 vehicles a day, projected to reach 330 by 2040. The structure is 134 ft (40.8 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesGuillory RD
CrossesBayou Mallet
Location1.0 Mi. S. of US 190
RouteCounty Highway 0
CountySt. Landry Parish
StateLouisiana
Coordinates30.49755, -92.28317
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
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 inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating47.8 US tons
Inventory rating36.8 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length134 ft (40.8 m)
Longest span19 ft (5.8 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2020)
Projected traffic330 by 2040
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Guillory RD over Bayou Mallet built?

It was built in 1986, making it 39 years old in 2025.

What condition is Guillory RD over Bayou Mallet 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 January 2025.

How much traffic does Guillory RD over Bayou Mallet carry?

About 300 vehicles per day (2020 count).

How long is Guillory RD over Bayou Mallet?

The structure is 134 ft (40.8 m) long with a longest span of 19 ft (5.8 m) and a deck 30 ft wide.

Who owns Guillory RD over Bayou Mallet?

It is owned by the County Highway Agency.