Erosion control

February 2008 » PROGRESSIVE ENGINEERING TECHNOLOGY
Erosion control blankets, turf-reinforcement mats, check dams, earth anchors, streambank armor, hydraulic mulches, erosion control design software, and more
CE News Staff

According to the U.S. Environmental Protection Agency, "The most environmentally dangerous period of development is the initial construction phase when land is cleared of vegetation and graded to create a proper surface for construction. The removal of natural vegetation and topsoil makes the exposed area particularly susceptible to erosion, causing transformation of existing drainage areas and disturbance of sensitive areas." In addition, changes to stormwater discharge or channel modification for development or flood control can impact streambank erosion and stability downstream. In response to a request from CE News, companies provided the following information about their products for providing effective erosion and sediment control.

American Excelsior Company’s free erosion and sediment control design software runs directly from the Internet at www.erosionworks.com. ErosionWorks users can generate a savable and printable report in PDF format. The software incorporates department of transportation (DOT) product approval status into the design program. A drop-down menu allows users to select any state and the program will list the products currently approved by that state’s DOT. According to the company, this feature saves designers, specifiers, and contractors time because they no longer have to sort through each state’s approved product list. American Excelsior Company says it is continuously adding product approvals and updating ErosionWorks features based on user feedback.
Request more information

Belton Industries, Inc., manufactures and distributes both woven polypropylene and 100-percent biodegradable, all-natural erosion control fabrics. Belton’s all-natural, rolled erosion control fabrics made from the yarns of the coconut (coir) are used for steep- or cut-slope applications to re-vegetate slopes and channels. Sold under the trade name GEOCOIR, it is available in three weights.
Request more information

CONTECH Earth Stabilization Solutions Inc. says its A-Jacks concrete armor units provide an alternative for streambank erosion control that can be used cost effectively with biostabilization techniques. A-Jacks are high-stability concrete armor units designed to interlock into a flexible, highly permeable matrix. A-Jacks can be installed either randomly or in a uniform pattern. The interstices formed within the A-Jacks matrix provide approximately 40 percent void space in the uniform-placement pattern. The voids provide habitat for fish and other marine life when applied as a reef, revetment, or soil-support system in river applications. Above the normal base flow, the voids can be backfilled with suitable soils and planted with grasses, shrubs, and trees.
Request more information

Donnelly Fabricators, Inc., offers TEXICON Erosion Control Systems, which are constructed by filling high-strength fabric forms with fine aggregate concrete. According to the company, they can provide superior performance to rip rap, cast-in-place concrete, or precast concrete erosion control systems while providing significantly lower construction costs. TEXICON fabric forms can be installed above or below water. Form styles allow for variable surface contours to slow or increase water flow over the surface of the system, for planting vegetation within the boundaries of the forms, or to allow the form to adapt to uneven settlement in the subgrade beneath the system.
Request more information

ErosionControlBlanket says the larger width of its full line of 16-foot-wide, biodegradable rolled erosion control products allows less overlap for easier installation. Leno woven jute netting gives the blanket an expandable weave that, according to the company, limits the potential for wildlife entanglement. With cotton thread, these blankets are made of 100-percent natural fiber, making them suitable for ecologically sensitive jobsites in wetlands, streambank stabilization, and forest lands.
Request more information

ERTEC Environmental Systems’ S-Fence, an alternative to silt fence on or around construction sites, is designed to allow water flow-through. A particle filter encased in a high-density polyethylene (HDPE) outer jacket retains soil particles. According to the company, it also reduces water velocity to reduce erosive energy, stands up to wind and UV exposure, and is reusable and recyclable. The rated filter flow rate is 17 gallons per minute per square foot. S-Fence is available in 7-foot lengths, with an installed freeboard height of 7 inches.
Request more information

Foresight Products LLC, manufactures the Manta Ray and Stingray earth anchor tieback systems for shoring, bulkheads, retaining walls, segmental retaining walls, geo-textile constructions, articulated concrete block/revetment mats, gabions, foundation augmentation, and stabilization applications. Features include no excavation, no soil disturbance, and, according to the company, ease of installation with working capacities as great as 65 kips.
Request more information

HESCO Bastion USA’s prefabricated, multi-cellular Concertainer units have a Galfan-coated, steel mesh framework lined with non-woven polypropylene material, with integrated cells to provide internal structural integrity. The vertical joints are made from helical coils to form 360-degree hinges. The units fold flat when empty so that several can be carried on a standard pallet or skid. On site, Concertainer units can be filled with locally available material using standard backhoe loaders or similar equipment. Joining pins enable individual units to be connected into a structure of unlimited length. According to the company, the units can be used to control erosion, shore-up unstable slopes, or control water flow.
Request more information

Nilex Environmental says its permeable GeoRidge and GeoRidge Bio CheckDams act as energy dissipaters, reducing water flow velocities and causing silt and sediment to settle upstream. Additionally, the company says, reduced water velocity minimizes downstream erosion. GeoRidge is constructed of a UV-stabilized HDPE; GeoRidge Bio is made from biodegradable materials that degrade over an 18- to 24-month period. Galvanized or biodegradable spikes are used to secure the check dams in roadside channels or swales, stormwater channels, or along slopes. Nilex recommends use of erosion control blankets in conjunction with the CheckDams to prevent undermining and encourage vegetation growth.
Request more information

Penda Corporation’s SmartDitch is a flexible, thermoformed HDPE channel system that resists hydraulic forces and provides a stable channel. As a slope or terrace drain, SmartDitch can be used to reduce erosion and be designed as a collector and outlet for the drainage system. Channel sections can be installed within a new ditch or used as a permanent, maintenance-free lining for existing concrete installations. The system is offered in trapezoidal (12-inch and 24-inch depths) and semi-circular (24-inch depth) designs. The lightweight SmartDitch sections can be stacked for shipping and storage and are easily installed on site. The semi-circular design also can be used above ground with optional saddles for temporary flow diversion. According to the company, SmartDitch also prevents unwanted vegetation and provides a self-scouring action that minimizes silt build-up.
Request more information

PROFILE launched its new ProPlus line of Prescriptive Agronomic Formulations, which the company says are designed to improve the chemistry of soils at critical early stages of plant development. The line currently comprises five products, each designed to address specific agronomic needs: Aqua-pHix neutralizes alkaline soils with pH values greater than 7.3; NeutraLime treats acidic soils with pH values less than 6.2; JumpStart includes beneficial soil bacteria, humic acid, and a wetting agent to improve water infiltration and retention and promote faster nutrient uptake and conversion; BioPrime is designed to address issues that affect long-term plant vitality with a proprietary slow-release nitrogen formulation that also includes seaweed extract, humic acid, and Endo Mycorrhizae; and Terra-Shield MPT is a proprietary Micro-Pore Technology mixture designed to be incorporated into the highly-viscous Flexterra Flexible Growth Medium (FGM) and CocoFlex Extended Term-Flexible Growth Medium (ET-FGM) fiber matrix slurries, absorbing additional erosive forces and moisture.
Request more information

Propex Geosynthetics uses 3-D woven technology in the design of its Pyramat High Performance Turf Reinforcement Mats (HPTRMs) and Landlok 300 Turf Reinforcement Mats (TRMs). These netless, composite-free TRMs and HPTRMs feature a rugged material construction that the company says combines superior tensile strength, flexibility, and UV stability for longer design life. Designed with Propex’s patented X3 fiber technology, Pyramat and Landlok 300 lock seed and soil in place for permanent reinforced vegetation. Landlok 300 is ideally suited for steep slope and moderate-flow stormwater channels requiring immediate, long-term erosion protection, reinforced vegetation, and water quality enhancement capabilities. Pyramat is designed for use in demanding erosion control applications such as high-flow channels, extreme slopes, and pipe inlets and outlets.
Request more information

Rolanka’s BioD-Mat erosion control blankets are woven from machine-spun bristle coir twines—the longer, stronger coir fiber, according to the company. These 100-percent biodegradable blankets, with a four- to six-year functional life, hold moisture and support seed germination and seedling growth to establish vegetation in channels, on slopes, and along shorelines. Users can plant through the open-weave blankets without cutting into it. In addition, movable intersecting coir twines help prevent wildlife injuries and deaths. BioD-Mat blankets are available in four unit weights: BioD-Mat 40, BioD-Mat 60, BioD-Mat 70, and BioD-Mat 90. The rolls are available in widths of 3.2 feet, 6.5 feet, 9.8 feet, and 13 feet.
Request more information

TerraNovo’s EarthGuard Fiber Matrix, which the company says defined the category of Stabilized Fiber Matrix (SFM), works directly with the soil to maintain its stability and control erosion. It works by preserving and binding existing soil structure and flocculates fine sediment being dislodged by stormwater or wind. According to TerraNovo, unlike bonded fiber matrixes and other copolymers, EarthGuard doesn’t harden to create a false barrier, but instead allows water to enter the soil, promoting the best environment for vegetation. EarthGuard can be applied with or without seed.
Request more information


Upcoming Events

See All Upcoming Events