Culvert & Outfall Erosion Protection Solutions

Permanent Erosion Control for Culverts & Outfalls

Protect roadside culverts and outfalls with HYDROTEX fabric formwork for the casting of concrete erosion control systems. Save money on installation costs and deliver a solution that fulfills the requirements of all project stakeholders.

Get a project estimate today:



Permanent Erosion Control for Culverts & Outfalls

Protect roadside culverts and outfalls with HYDROTEX fabric formwork for the casting of concrete erosion control systems. Save money on installation costs and deliver a solution that fulfills the requirements of all project stakeholders.

Get a project estimate today:



HYDROTEX fabric-formed concrete is the best erosion control solution for culvert and outlet protection.

Roadside culverts should be protected from soil loss with a custom-manufactured erosion control system.

Synthetex manufactures the leading permanent erosion control product for municipalities and DOTs who want to permanently protect culverts and outfalls against erosion. HYDROTEX fabric-formed concrete is the top solution for this application, providing a permanent lining that requires minimal upkeep.

How is HYDROTEX used for outfall and culvert protection?

The Problem

Roadside culverts and outfalls are at a high risk of erosion, affecting inlet and outlet control. It can also expose the pipe, leaving it susceptible to critical damage that may permanently reduce the efficiency of the culvert’s components. This can cost thousands of dollars in repair.

The Solution: HYDROTEX Fabric Forms for the In-Situ Casting of Concrete

Prevent erosion at culverts by installing a HYDROTEX fabric-formed concrete mattress. Whether you opt for a filter point, uniform section, or articulating block formwork, a HYDROTEX cast-in-place mattress will help guide the water into or out of the pipe and permanently protect against erosion.

Best HYDROTEX Fabric Forms for Protecting Culverts

HYDROTEX Filter Point

HYDROTEX® Filter Point



HYDROTEX Filter Band

HYDROTEX® Filter Band® Concrete Mattress



HYDROTEX Uniform Section

HYDROTEX® Uniform Section



HYDROTEX Enviromat

HYDROTEX® Enviromat®



Articulating Block Concrete Mat on Slope

HYDROTEX® Articulating Block



Have a pressing question? Want a consultation or project estimate?

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Permanent Canal Lining to Prevent Seepage

Sometimes a canal needs to be lined on the sides and the bottom to protect against seepage and erosion. In those cases, a HYDROTEX fabric-formed concrete mat is the best choice.

With a diver’s help, the unpumped geosynthetic panel can be dragged across the riverbed. Once pumped with fine aggregate concrete, the mattress will naturally adjust to the soil.

Which industries typically need canal lining services?

Mine
River and canal erosion control
Airport runway

The Better Alternative for Precast Concrete Canal Lining

Unlike pre-cast concrete blocks, HYDROTEX can be easily transported to and from the project site.

No matter how remote or how close the canal is to a major highway, you will have no trouble transporting the geosynthetic panels to the installation site.

Additionally, other lining alternatives such as brick, puddle clay, LDPE plastic, cement, earthen types, or asphalt offer only a temporary solution that requires upkeep or replacement within a few years. HYDROTEX, on the other hand, is permanent and maintenance-free. After installation, HYDROTEX fabric-formed concrete mattresses can last up to thirty years without any intervention.

Related Solutions

Roads, Highways, & Airports Erosion Control

Erosion Control for Roads, Highways, & Airports

Synthetex makes the best permanent erosion control products for roadside ditches, highway embankments, and airport detention ponds.

Erosion control isn’t limited to rivers, canals, or places with water. Wind and other environmental factors can cause soil loss, which is why you should rely on Synthetex to manufacture a custom-made concrete mattress that will protect roadside ditches, culverts, detention ponds, and more.

Why is HYDROTEX the top choice for your roads, highways, and airports erosion control project?

Forget about checking up on an erosion control product months and years after installation. HYDROTEX fabric-formed concrete is the top solution for Departments of Transportation because of its easy installation process, cost-effectiveness, and durability.

HYDROTEX fabric-formed concrete can last for up to fifty years without needing maintenance or upkeep. It is truly the best solution for Departments of Transportation looking for a durable erosion control solution that won’t cost them thousands of dollars in repair.

Save money, resources, and time on your next erosion control project. Get a project estimate:

Erosion Control for Departments of Transportation (DOTs)

From complex highway interchanges and major bridge river crossings to local streets, bikeways and pedestrian paths, Synthetex can assist a project through conceptual design and construction. Whether we are working with a multidisciplinary engineering firm, local community or contractor, we take care of your DOT erosion control requirements and needs.

HYDROTEX can be installed at:

Interstate highways
State and local roadways
Railroad overpasses
Canal overpasses
Bikeway and pedestrian overpasses

Erosion Control for Airports

Rain that hits runways, ramp areas and buildings flows through drainage ditches and culverts, and ends up in the stormwater collection systems. This water can become contaminated due to the storing, utilizing, handling and disposing of fuel and hazardous materials on the property. Aircraft fueling, equipment cleaning, oil and fuel spills, and maintenance activities can all contribute to this contamination and affect surrounding streams if not prevented.

Synthetex’s HYDROTEX® Fabric Formed Concrete erosion control and scour protection systems provide a wide range of solutions for concrete-lined collection and drainage ditches to stormwater detention ponds.

Erosion Control for Railway Transportation

Many countries rely on railways as their primary methods of passenger and freight transport. Europe has an integrated network throughout the entire continent. In India, China and Japan, millions of people use trains everyday. In North America, freight rail transport is also widespread.

If you’re a railroad engineer, we’re here to help. We know that railroads across the globe are prioritizing maintenance-of-way projects focusing on bridges. The work is either part of broader plans to maintain states of good repair or it’s part of an initiative to replace a worn-out bridge so a new one can better accommodate heavier loads and faster trains.

Synthetex’s HYDROTEX® Fabric Formed Concrete erosion control and scour protections systems are your solution. We can custom-manufacture fabric forms to create articulating concrete block scour aprons at bridge abutments and around support columns, or to create a revetment along the track.

Why us?

Synthetex provides best-in-class erosion control, scour protection and technical services to help you achieve sustainable solutions. We foster long-term relationships with you, offering cost-effective and reliable design and construction expertise that creates value at every turn.

Save money, resources, and time on your next erosion control project. Get a project estimate:

Enviromat®

Enviromat® (EM) Concrete Linings


Enviromat Concrete Linings are installed to provide protection against periodic high flows. After installation, vegetation can be planted within the open structure of the lining to create a more natural appearance. Enviromat Concrete Linings are used in drainage ditches and on the upper slopes of channels, canals, lakes, reservoirs, rivers, and other water courses as well as for embankments subject to heavy run-off.

Enviromat Linings are comprised of concrete-filled elements and unfilled areas that allow for the establishment of vegetation.  Once the concrete sets, the defined unfilled and interwoven areas are opened by cutting the fabric and are planted or are filled with topsoil and seeded.  Within a growing season a vegetated cover will normally extend over the lining, resulting in an erosion control system with the hydraulic, ecological and aesthetic features desired.

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HYDROTEX® FilterBand®

FilterBand® (FB) Concrete Linings


FilterBand® (FB) Concrete Linings are similar to Filter Point, providing an effective and highly permeable concrete lining that resists erosive forces. FilterBand® differs from Filter Point in that the form creates interconnected, tubular concrete elements that are separated by large, interwoven filtration bands.  The filtration bands provide for greater reduction of uplift pressures than Filter Point Linings.  Also, the biaxial alignment of the tubular elements creates two directionally determined coefficients of hydraulic friction. As a result, FilterBand® achieves greater reduction of flow velocity or wave energy than Filter Point.

FilterBand® concrete linings are specified in situations similar to those for which Filter Point might be specified, which also require greater relief of uplift pressures, higher reduction of flow velocities, or greater reduction of wave run-up.

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HYDROTEX® Uniform Section

Uniform Section (US) Concrete Linings

Uniform Section (US) Concrete Linings


Uniform Section (US) Concrete Linings are similar to traditional concrete slope paving.  They create a solid, high-quality concrete lining with a relatively low hydraulic resistance and uniform cross-section.  Uniform Section linings are used to reduce the infiltration or exfiltration of aggressive waste and chemical fluids into or out of open channels and basins.  They are also used to reduce exfiltration in arid regions where open channels and basins require watertight linings.

Uniform Section Concrete Linings are resistant to leachate and most chemicals.  They protect geosynthetic liners from mechanical damage, exposure to UV light, and freeze-thaw cycles.  These self-supporting, high-strength linings permit construction on steep side slopes and replace the conventional use of clay or sand as liner protection. Placement of the forms and concrete filling can be performed without the use of equipment on the liner.  The tensile strength and abrasion resistance of the fabric protect the liner from the pumped concrete.

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HYDROTEX® Articulating Block

Articulating Block (AB) Concrete Linings

Articulating Block (AB) Concrete Linings


Articulating Block Mats form cable-reinforced concrete block mattresses that resist erosive forces. They are often constructed where a revetment is exposed to frontal attack by wave action.

AB Mats are typically used to protect coastlines, canals, rivers, lakes, reservoirs, underwater pipelines, bridge piers, and other marine structures from propeller wash, ship wakes, wind waves, currents, and high velocity flows. They are also used in environmental construction for landfill caps, down chutes, and collector channels.

The AB fabric form consists of a series of compartments linked by an interwoven perimeter. Grout ducts interconnect the compartments, and high-strength revetment cables are installed between and through the compartments and grout ducts.

Once filled, the AB Mats become a mattress of pillow-shaped, rectangular concrete blocks. The interwoven perimeters between the blocks serve as hinges to permit articulation. The cables remain embedded in the concrete blocks to link the blocks together and facilitate articulation.

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Submit a Request for an Articulating Block Specification

We’ll get back to you within 1-2 business days. All specifications are available in both nylon and polyester configurations.

Submit a request for a technical specification

We’ll get back to you within 1-2 business days. All specifications are available in both nylon and polyester configurations.





HYDROTEX® Filter Point

HYDROTEX Articulating Block

HYDROTEX Uniform Section

HYDROTEX Filter Band

HYDROTEX Enviromat

HYDROTEX® Filter Point

Filter Point (FP) Concrete Linings

Filter Point (FP) Concrete Linings


Filter Point Concrete Linings with filtration points (drains) provide erosion-resistant, permeable concrete linings for ditches, channels, canals, streams, rivers, ponds, lakes, reservoirs, marinas, and protected port and harbor areas.

Filter Point Concrete Linings have a cobbled surface and a relatively high coefficient of hydraulic friction in order to achieve lower flow velocities and to reduce wave run-up. The filtration points provide for the relief of hydrostatic uplift pressures, increasing the system’s stability.

Filter Point Concrete Linings were the first type of fabric formed concrete system developed. In 1965, a Dutch patent was issued for “fabric formed slope paving.” The form suggested by this patent was later refined to create the first “filter point” lining.

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Submit a Request for a Filter Point Specification

We’ll get back to you within 1-2 business days. All specifications are available in both nylon and polyester configurations.

Submit a request for a technical specification

We’ll get back to you within 1-2 business days. All specifications are available in both nylon and polyester configurations.





HYDROTEX® Filter Point

HYDROTEX Articulating Block

HYDROTEX Uniform Section

HYDROTEX Filter Band

HYDROTEX Enviromat