What Size Culvert Do I Need for My Driveway in Lafayette Louisiana?


A Common Question We Get From Homeowners

We frequently have homeowners call Acadiana Shell & Limestone and ask a question like this:

“I want to close the ditch in front of my yard and install culverts. What type of culvert and size culvert do I need?”

This is actually one of the most common questions we receive from property owners across Lafayette and throughout South Louisiana. Many homeowners want to install a driveway culvert so they can build a new driveway, improve access to their property, or clean up the appearance of the drainage ditch in front of their home.

While we supply culverts and construction materials every day, the answer to this question often surprises people.


The Direct Answer: Culvert Size Is Determined by Local Government

When it comes to installing a culvert in front of your property, Acadiana Shell & Limestone does not determine the size or type of culvert required.

Instead, homeowners must contact their local parish or municipal government office first.

Local government agencies are responsible for:

  • Drainage management

  • Flood control

  • Roadside ditch systems

  • Culvert permitting

  • Culvert sizing requirements

Because of this, the appropriate culvert size must typically be approved by the parish or local drainage authority before installation.

Once the proper size and type of culvert are determined, Acadiana Shell & Limestone can then provide pricing, materials, and installation services if needed.


Why Culvert Size Is Regulated in Louisiana

South Louisiana has unique drainage challenges. Our region receives significant rainfall each year, and roadside ditches are part of a larger drainage system designed to move water safely away from roads and properties.

If a culvert is too small, it can cause serious issues such as:

  • Flooding in yards

  • Water backing up into neighboring properties

  • Drainage problems along the roadway

  • Increased erosion

  • Potential violations of local drainage regulations

Because these drainage systems are interconnected, local governments carefully regulate culvert installations to maintain proper water flow.

That is why parish public works departments typically evaluate:

  • The width of the ditch

  • The depth of the ditch

  • Water flow capacity

  • Nearby drainage systems

  • Roadside infrastructure

Based on this evaluation, they will determine the correct culvert diameter and length required for your driveway installation.


How the Culvert Permit Process Usually Works

Although the exact process may vary slightly depending on the parish or municipality, most homeowners in the Acadiana region follow a similar process when installing a driveway culvert.

Step 1: Contact Your Local Parish or City Government

The first step is contacting the local public works or drainage department in your area. Let them know you plan to install a culvert to close the ditch for a driveway.

They may ask for information such as:

  • Property address

  • Location of the driveway

  • Photos of the ditch

  • Approximate driveway width


Step 2: Site Evaluation or Approval

In some cases, the parish may send someone to inspect the ditch to determine:

  • Water flow requirements

  • Correct culvert size

  • Required culvert material

  • Minimum culvert length

They may also issue a permit or approval documentation specifying the required culvert size.


Step 3: Obtain the Correct Culvert Size

Once the parish or city provides the required culvert specifications, you will know exactly what size culvert is needed.

Common culvert sizes in South Louisiana often include:

  • 12-inch culverts

  • 15-inch culverts

  • 18-inch culverts

  • 24-inch culverts

However, the correct size depends entirely on local drainage requirements, which is why approval is necessary.


Step 4: Contact Acadiana Shell & Limestone for Materials or Installation

Once you know the correct culvert size and type required, Acadiana Shell & Limestone can help by providing:

  • Culvert materials

  • Culvert pricing

  • Limestone driveway materials

  • Delivery services

  • Site preparation

  • Culvert installation

  • Driveway construction

Our team works with property owners, builders, and contractors throughout Lafayette and the surrounding Acadiana region to supply quality construction materials and site work services.


Local Contractor Tip

In South Louisiana, drainage is extremely important because of our heavy rain and soft soil conditions.

Before purchasing a culvert, it is always best to confirm the required culvert size with your local parish or municipality first. Installing the wrong size culvert can lead to drainage problems and may require costly corrections later.

A quick call to your local public works department can save time and prevent future issues.


Important Disclaimer

Acadiana Shell & Limestone supplies culverts, construction materials, and provides site work services including culvert installation.

However, culvert sizing, drainage permits, and installation requirements are determined by local parish or municipal government agencies. Homeowners should always confirm these requirements with the appropriate local authority before purchasing or installing a culvert.


Related Questions Homeowners Often Ask

Do I need a permit to install a culvert in Lafayette Louisiana?

In many areas, yes. Local governments often require permits or approvals for driveway culverts to ensure the installation does not interfere with drainage systems.


How much does a driveway culvert cost in Louisiana?

Culvert pricing depends on several factors including the diameter, length, material, and delivery requirements. Once the correct culvert size is determined, Acadiana Shell & Limestone can provide accurate pricing.


What type of culvert is best for a driveway?

Most residential driveways use corrugated metal culverts or HDPE plastic culverts, but the required material may depend on local government requirements.


Who installs driveway culverts near Lafayette Louisiana?

Many homeowners choose to have culverts installed by local contractors or site work professionals. Acadiana Shell & Limestone can supply culverts, materials, and assist with installation services in many cases.


How long do culverts typically last?

Culverts can last many years depending on the material used and soil conditions. Proper installation and drainage design are key factors in long-term durability.


Helping Property Owners Across South Louisiana

At Acadiana Shell & Limestone, we work with homeowners, contractors, and property developers throughout Lafayette and across Acadiana to supply reliable construction materials and site work services.

With offices in:

  • Abbeville

  • Lafayette

  • New Iberia

  • Krotz Springs

and satellite yards located throughout South Louisiana, we are able to supply materials and services across the region.

Whether you need:

  • Culverts

  • Limestone driveway materials

  • House pads

  • Land clearing

  • Land leveling

  • Site preparation

  • Drainage solutions

our team is here to help.


Contact Acadiana Shell & Limestone

If you already know the culvert size required for your property, our team can help with pricing, delivery, and materials for your project.

Acadiana Shell & Limestone proudly serves Lafayette, Abbeville, New Iberia, Krotz Springs, and surrounding South Louisiana communities.

Contact our team today to learn more about culverts, driveway materials, and site preparation services.


Author

Clay Young
Construction Industry Marketing Specialist
Acadiana Shell & Limestone

Clay Young has more than two decades of experience working with construction businesses, contractors, and material suppliers across Louisiana. His work focuses on helping property owners better understand site preparation, construction materials, and land development processes throughout South Louisiana.