COASTAL AND WATERWAY SYSTEMS system overview TENSAR® Triton Systems owe their strength and durability to Tensar® Uniaxial (UX) Geogrids. ® Triton Coastal and Waterway These geogrids stand the test of time, performing better than other commercially Systems are a durable, non- available due to their stiff corrosive solution to many coastal interlocking capability. For more information, visit www.tensarcorp.com. and inland waterway issues.

Overview

Triton® Coastal and Waterway Systems from Tensar Increased hydraulic performance and constructability International Corporation (Tensar) feature a number of advantages mean Triton Systems can be significantly innovative composite marine structures used for less expensive than conventional solutions such as . applications in and around water. Triton Systems are made of They also conform to land contours and site configurations advanced and geotextile materials and are designed while resisting scour far better than rigid systems. Since to be integrated with available fill and/or vegetation. Tensar® Geogrids enable Triton Systems to resist all naturally occurring forms of chemical, biological and environmental Triton Systems are used for the following applications: degradation, they are often specified for salt water, industrial ˴˴ Bridge scour protection run-off conditions and contaminated sediment capping where ˴˴ Channel lining other types of materials would deteriorate rapidly. Marine ˴˴ projects Mattresses are available in various styles and thickness options to meet specific project requirements. ˴˴ , levee, dike and bridge approach projects ˴˴ Capping of contaminated sediments ˴˴ Pipeline and cable protection ˴˴ Living shoreline projects ˴˴ Foundations for breakwaters, groins and jetties ˴˴ Erosion and scour control ˴˴ Underlayers for riprap in submerged and soft

TRITON Systems Components

COMPONENT FUNCTION

Marine Mattress Coastal , Riverbank and Shoreline

Filter Mattress Bedding and Filtration, Deep Water Geotextile Installation

Gabions and Mats Retention Structures, Channel Lining

Marine Cells Breakwater Core, Foundation

Grid Composite Riprap/Revetment Underlayer

2 Marine Mattress System

The Triton® Marine Mattress System is designed for ˴˴ Wave or flow conditions that challenge the stability demanding conditions associated with erosion control of a mat’s exposed edge armoring, scour protection and submerged foundation ˴˴ Rapid installation or emergency repairs projects. The system’s effectiveness results from key features, including: Triton Marine Mattresses have also been specified for the construction of submerged foundations. Installation friendly ˴˴ Monolithic high mass and and extremely adaptable, they simplify construction and ˴˴ Flexibility and hydraulic stability increase the support over bottom soils prone to settlement or scour. ˴˴ Durability and long-term tensile capacity of Tensar® Geogrids APPLICATIONS ˴˴ Energy dissipation characteristics ˴˴ Shoreline and stabilization ˴˴ Sensitivity to wave run-up or reflection ˴˴ Foundations for breakwaters, jetties, groins and dikes Triton Marine Mattresses have been widely used for ˴˴ Scour mats for underwater pipeline crossings and revetment applications, as as for scour protection and sewage outfalls channel linings. They are especially applicable for heavy erosive action in any of the following conditions: ˴˴ Riverbank protection, channel lining and bridge scour abatement. ˴˴ Salt water or other harsh chemical environments ˴˴ Bridge scour protection ˴˴ Irregular surfaces or soft subgrade soils ˴˴ Steep slopes, stream or banks

Armor Stone 5 ft

12 in. Triton Marine Mattress Geotextile Fabric – can be attached to bottom of Mattress Unit

Triton® Marine Mattress Breakwater Foundation St. Andrews Bay, FL Marine mattresses simplify construction, increase support and reduce Triton Marine Mattresses were placed over an exposed pipeline to settlement caused by scouring action. protect it from marine traffic, tidal scour and storm impact.

3 Grid Composite System

The Triton® Grid Composite System is specially developed The enhanced performance is important for a wide range for use beneath riprap and armor stone. By combining of applications including revetments, channel linings, Tensar® Geogrids with geotextiles, Grid Composites provide spillways, streambanks, scour protection, groins, jetties an improved foundation and filtration layer for a broad range and breakwaters. Grid Composite can be particularly of riprap, rubble-mound structures and similar installations. effective for improving performance and constructibility Nominal roll size is 12 ft wide and 164 ft long. in difficult conditions, including: ˴˴ Submerged construction IMPROVING PERFORMANCE The use of geotextile as riprap underlayer is well ˴˴ Soft subgrade soils established. Geotextiles provide separation and filtration ˴˴ Steep slopes at the subgrade interface. Adding Tensar Geogrid further enhances performance by: ˴˴ Jetty tightening

˴˴ Reducing settlement by distributing loads over a INCREASING COST EFFICIENCY wider area (similar to the way a snowshoe works) The primary purpose of using Grid Composite is to improve ˴˴ Holding geotextile firmly against subgrade to guard service life and performance, thereby reducing long-term against scour costs for maintenance, repair and replacement. However, it can also facilitate initial cost savings by eliminating more ˴˴ Providing a protective “cushion” for the geotextile expensive alternatives such as graded aggregate filters, during and after construction excessively thick sections, over-excavation of soft subgrades or re- of steep slopes.

Soft Soils Installation Ft. Clinch State Park, FL Provides load distribution to improve constructibility and Armorstone was placed directly on Triton® Grid Composite in constructing reduce settlement. a coastal groin. Another width of grid composite will be placed next to 4 overlap the exposed edge of Grid Composite. Stone placement will then proceed seaward toward the left. Tensar® Geogrid composite eliminated the need for steel sheet piling for sand tightening this structure.

Savannah River – Savannah, GA Triton® Systems are Non-Metallic Stratford Causeway – Stratford, CT The Triton® Marine Mattress System was installed Dangerous metal corrosion, which causes billions Triton Systems were selected to replace riprap at to counter these conditions: soft subgrade soils, of dollars in damage each year, is a primary this environmentally sensitive site. The mattress irregular subgrade surfaces and salt water. reason to consider Triton Systems’ solutions. structure provides a habitat for native plants, 5 organisms and other wildlife. Marine Cell Systems

TRITON® MARINE CELLS FOR EARTH FILLS APPLICATIONS Triton® Marine Cells are used to construct high-strength, Triton Marine Cells are used for: composite earth fills in adverse conditions – including ˴˴ Bulkheads (new construction or rehabilitation) confined, structural-quality fills built below the water level or with weak fill materials (a geotextile liner placed within ˴˴ Cores for breakwaters, groins, jetties and dikes the cells enables the use of fine-grained fill materials). ˴˴ Foundations for embankments or MSE slopes or walls As a three-dimensional foundation mat, Triton Marine Cells can improve not only constructability but also stability, ˴˴ Containment dikes for dredge spoils or other and distribution of pressure. Their rapid waste materials filling characteristics and ability to reduce dewatering requirements can shorten construction timetables and

increase productivity. Proposed Roadway Marine Cell Foundation MARINE CELL ADVANTAGE ˴˴ Non-corrosive materials ˴˴ Faster filling than ˴˴ Stone Veneer option Geogrid ˴ ˴ Construct structural embankments with marginal Existing Slope fill or submerged conditions Triton Marine Cell Triton Marine Cell Triton Filter Mattress

Triton® Marine Cells provide foundations for embankments, MSE slopes or walls and improve not only constructability, but also stability, bearing capacity and distribution of pressure.

Lake Calcasieu, LA Triton Circular Marine Cells anchored by Tensar® Geogrid, provide economical, easy-to-install solutions for applications like ­this channel Rectangular Marine Cells are used to construct high-strength embankments wall in a residential community. 6 in submerged conditions using fine-grained fills. Here, a Marine Cell forms the core of a riprap breakwater installation. 7 Manufactured from durable polymers, these geogrids resist chemical, biological and environmental degradation to ensure long-term structural integrity and service life.

Vegetated Reinforced Slopes

SOIL BIOENGINEERING WITH TENSAR® MSE SYSTEMS INNOVATIVE SYSTEMS FOR SOUND SLOPE For centuries, soil bioengineering techniques have been used INSTALLATIONS to protect and restore sensitive watersheds. Among its many Tensar® offers three systems for VRSS projects. Each features applications, soil bioengineering sustains vegetated systems the use of Tensar Uniaxial (UX) and/or Biaxial (BX) Geogrids for that provide erosion control with additional benefits including: structural reinforcement and surficial stability. Systems include: ˴˴ Improved water and air quality ˴˴ Triton® Coastal and Waterway Systems – Triton Marine Mattresses, Marine Cells, Gabions and Gabion Mats ˴˴ Support for terrestrial, riparian and aquatic habitats feature the flexibility, durability and hydraulic stability ˴˴ Storm water management required, conforming to land contours and irregular subgrades for effective erosion control. (See specific ˴˴ Aesthetic site enhancement product profiles within this brochure.) Integrated with Tensar’s mechanically stabilized earth ˴˴ Sierra® Slope Retention System – The Sierra System (MSE) systems, soil bioengineering has the capacity renders a reinforced, natural sloping structure nearly to reach new heights – literally – with the construction of indistinguishable from native . Geogrids and facing Vegetated Reinforced Soil Slopes (VRSS) on highly steepened materials work together to provide beauty, performance, sites. Fully engineered, these ecologically and structurally economy and versatility. sound installations provide secure, cost-effective and environmentally responsible solutions on river, stream, ˴˴ SierraScape® Wire-Formed System – waterfront, upland slope and flood control sites. VRSS The only geogrid-reinforced, wire-formed wall system installations ensure the stability necessary to protect featuring a positive mechanical connection. The sites while supporting healthy, vegetated, maintenance- SierraScape System effectively withstands differential free environments. settlement and provides exceptional stability in areas of seismic activity or the prevalence of heavy external loads.

Slope Varies Woody Plants

Stone

Tensar® VRSS promote the propagation of native vegetative systems Cross section view of VRSS showing marine mattresses as toe protection to strengthen reinforcement structures over time. and foundation support at the submerged toe of the reinforced slope. 8 Gabions and Gabion Mats

Triton® Gabions offer a durable, non-corrosive and installation- Triton Gabions and Gabion Mats are frequently specified for friendly alternative to conventional steel wire gabions – use where there is high potential for corrosion, such as: including those galvanized and PVC-coated. They are ˴˴ Salt water advantageous for a number of earth stabilization and erosion protection applications. ˴˴ De-icing salt run-off Triton Gabion Mats are available in prefabricated units or ˴˴ Acidic environments (mining) in unfabricated roll form. The mat dimensions (up to 13 ft In addition to corrosion resistance, the lightweight materials width and 164 ft length) can be customized to limit waste are ideal for use on remote access locations, where getting to and to increase installation productivity, while the grid the site is a significant challenge. aperture can be reduced to accommodate smaller stone infill and to reduce mat thickness. Lighter in weight than The special, liftable configurations of Triton Gabion Mats also metallic mats, Triton Gabion Mats are easier and less costly make a more lightweight version of a marine mattress. Ideal to transport, handle and install. for light-to-moderate energy conditions or applications – they can be used as: APPLICATIONS ˴˴ Scour mats/substrate for artificial reefs, oyster beds, etc. Triton Gabion Mats are used for: ˴˴ Armoring steep slopes ˴˴ Channel linings, ditches and spillways ˴˴ Foundation filtration or for boat ramps, pipelines, ˴˴ Scour aprons low energy breakwaters and structures ˴˴ Shoreline protection ˴˴ Canal and stream bank protection

Cuenca del Rio Guayas – Guayaquil, Ecuador Gabion Mat – Chiapas, Mexico Port of Spain – Trinidad Triton® Gabion Mats are lightweight, customizable, Triton Gabion Mats provide protection to several Triton Gabion Mats provide long-term performance and easy to handle – features which significantly kilometers of drainage . They were selected even in harsh chemical environments such as this ease installation. over competitive solutions due to superior saltwater tidal zone. performance and competitive cost. 9 Triton® Filter Mattress System

Triton® Filter Mattresses were developed in response to The Triton Filter Mat is designed to meet the challenges challenging conditions described by a project engineer. The of effective scour protection in difficult installation condi- problem was a deep scour hole that threatened an existing tions. The custom-fabricated “Filter Mat” (shown above) historical structure. The engineer knew what to do: place encapsulates geotextile fabric and six inches of aggregate. geotextile on the subgrade and place armor stone riprap on The filter mat serves two primary functions: deployment the geotextile to prevent further scour. The problem was how of geotextile in fast-moving water and foundation/scour to keep the geotextile fabric in place until the contractor could protection for the armor stone riprap placed to protect the get the armor stone in place. By encapsulating the geotextile existing sea wall. fabric within a stone-filled geogrid mattress, the contractor Features include: was able to construct the revetment with the assurance that the geotextile fabric was exactly where it needed to be. ˴˴ Job specific geotextile Thus, Triton Filter Mattresses were designed for challenging ˴˴ Thickness options underwater installation. They provide a deployment method to place geotextile fabric in deep water and strong currents. ˴˴ Various installation or handling configuration options The stone fill provides: Applications include: ˴˴ Ballast weight for the geotextile fabric ˴˴ Submerged revetment foundation ˴˴ Bedding layer for additional riprap/armor stone ˴˴ Submerged geotextile deployment

Hereford Inlet Sea Wall – North Wildwood, NJ ­­As a revetment foundation, the Filter Mat provides bedding and filtration, The Triton® Filter Mattress System was installed to help improve helping to prevent differential settlement. The mats also protect against the performance of the sea wall protection at the Hereford Inlet scour at the toe of the revetment. Sea Wall project.

10 11 In Situ Capping of Contaminated Sediment

PROTECTING AND RESTORING OUR WATERWAYS Used in conjunction with the CETCO® Reactive Core Mat®, The Triton® Marine Mattress™ System is a proven leader in Triton Marine Mattresses have been deployed as part of a the coastal and waterway erosion control market. Some of modular reactive capping system for the remediation of the characteristics that make the Marine Mattress Systems Non-Aqueous Phase Liquids (NAPL) contaminated sediments. so effective for erosion control also make them effective for The Triton Marine Mattress Systems have been used to in situ capping of contaminated sediments. In addition to provide effective capping for a wide range of contaminated providing superior erosion control, Triton Marine Mattresses sediment projects. address industry concerns regarding: Triton Mattresses can also be configured to encapsulate ˴˴ Potential for re-suspension of contaminants alternative fill materials, such as sand, carbon or CETCO® Organoclay® materials in order to provide site specific ˴˴ Erodibility of capping material remediation solutions for a broad range of in situ ˴˴ Constructability capping applications.

• Uniform cap thickness • Over-design of capping layer to compensate for loss during construction ˴˴ Maintenance Concerns

• Cost • Accessibility ˴˴ Overall durability of capping materials

Triton® Marine Mattresses have been deployed as part of a reactive Triton Marine Mattresses have been used to provide effective capping 12 capping system for the remediation of NAPL when used with CETCO® for a wide range of contaminated sediment projects. Reactive Core Mats.® 13 The Engineered Advantage

The Triton® Systems surpass traditional materials with highly For more information on Triton Systems, please call adaptive, long-term solutions that are economical and easy 800-TENSAR-1, e-mail [email protected] or visit to install. They conform to site conditions and project www.tensarcorp.com/marine. We are happy to supply you requirements to provide efficient erosion protection. with additional system information, complete installation Their inert materials resist rust, rot and corrosion, even and design guidelines, system specifications, design details, in harsh chemical environments. And ­with their use of conceptual designs, preliminary cost estimates, sealed available fill, environmentally friendly Triton Systems are construction drawings, summaries of completed projects and cost-effective as well. much more. Tensar provides one other critical component with each Triton System – complete customer support. Our services support the entire process, from on-site evaluation to technical assistance during installation. And, our professional staff helps assure product availability and a prompt response. We’re committed to providing the right solution for your needs.

14 15 Tensar International Corporation 2500 Northwinds Parkway, Suite 500 Alpharetta, Georgia 30009

TensarCorp.com 800-TENSAR-1

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©2017, Tensar International Corporation. Certain products and/or applications described or illustrated herein are protected under one or more U.S. patents. Other U.S. patents are pending, and certain foreign patents and patent applications may also exist. Trademark rights also apply as indicated herein. Final determination of the suitability of any information or material for the use contemplated, and its manner of use, is the sole responsibility of the user. TRITON_BRO_6.17