Wetland, Stream Bank, and Shoreline Restoration
Product Case Study
Permanent Vegetative Solutions with the Envirolok System
Stabilizing slopes and water channels with traditional erosion control solutions can be challenging and costly. Envirolok offers a long-term, sustainable alternative that is cost-effective and easy to install. The tan geobag technology provides a permanent vegetative solution by combining the engineered strength of soil with the principles of plant ecology.
Participants will be introduced to the system components as well as Envirolok’s hands-on collaborative approach that drives project success from design to construction.
In exploring the design and specification process, the presentation will look at common attributes of slope failures and how to identify them on site. Top of slope failures and toe of slope failures tend to be the most common forms we see. Top of slop failures are most commonly attributed to overland flow, poorly compacted soils, over development and loss or removal of vegetation. Failures at the toe of soil tend to be more a result of lack of soil strength or influence of scouring of flashing water events. As we explore these causes, participants will also be introduced to ways to integrate hard armored solutions with the system when it is required for strength and scour protection.
Construction on slopes and waterways can be challenging work. Soils, to habitat and accessibility often make restoration difficult, if not impossible. By minimizing excavation, eliminating the need for footings and engineered backfill, the system eliminates the need for heavy equipment. Envirolok is designed for flexibility and can easily be constructed around existing site amenities, such as tree roots and utilities.
By collaborating with engineers, installers and property owners, Envirolok has worked to continue product development to allow for superior strength in the bags and specialized pin system. Through engineering and collaboration with soils scientists, bag-fill specifications provide a non-proprietary mix that provides the structural strength of granular sand and local available soils to encourage vigorous plant growth. It’s a simple solution and unlike other encapsulated bag and sock systems, compost has bin minimized or eliminated to reduce slumping and eliminate failures du to soil mix.
Envirolok is compatible with a variety of vegetation types and applications, such as hydroseeding, live planting and sod/ vegetative mats. These applications provide flexibility, depending on site conditions and project budgets. While native plantings are encouraged for native habitat, stormwater filtration and deep root systems, Envirolok is compatible with any mixture of native or ornamental landscape plants. Beyond vegetation selection for the Envirolok system, the course will detail plant selection for steep slopes, waterways and intertidal zones.
The success is in the variety of project installs throughout the US, Canada and Europe. Project case studies will look at various project types, reinforcement and vegetation methods. Project will include;
• Landslide Repairs in Portland, OR
• Riverbank Restorations in Oregon and Washington
• Streambank restoration in Roanoke, VA
• Living Shorelines in the Midwest & east coast
• Saltwater Tributaries in South Carolina and
• Stream Channel Restoration in Golden Co.
These projects will provide participants with an overview of cost in comparison to other traditional restoration techniques. Details of design, construction approach of lessons learned will also be covered.