Frontier Solutions fully understands the requirements of Storm Water Pollution Prevention Planning (SWPPP). We are certified annually, and use our knowledge to minimize delays, hassles, liability problems and related expenses. We’re a dependable partner who can oversee the details, give you peace of mind, and offer you the lowest cost for regulatory compliance.
Here are just a few of the products and services that we can incorporate into our comprehensive approach.
Channel stabilization is the improvement, construction, or stabilization of an open channel or waterway to prevent erosion and the deposit of sediment, while providing adequate capacity for drainage and floodwater.
Depending on the expected amount of water; channels can be stabilized with rock, concrete, or permanent vegetation. Soil under a rip-rap lined channel should be protected with a non-woven geotextile liner. When vegetation is used, an erosion control blanket is generally required.
Disturbed Area Stabilization (with permanent vegetation)
Permanent vegetation provides final stabilization to areas disturbed due to construction. Permanent vegetation such as grasses, trees, shrubs, or legumes will improve site aesthetics and may help restore wildlife to the area.
Disturbed Area Stabilization (with temporary seeding)
Temporary vegetation is used to stabilize areas that will be left undisturbed for more than 60 days, but are not yet on final grade.
Quick-growing grasses such as ryegrass are commonly used to establish temporary vegetative cover. For temporary seeding, lime is not required; however, fertilizer should be applied in areas where soil fertility is low.
Temporary seeds may be applied by hand, drill, cyclone spreader, or by a hydro seeder. Areas that have been temporarily seeded should be mulched at a depth not less than ¾ of an inch.
Erosion Control Matting and Blanket
Erosion control blankets provide protective ground cover on slopes and in channels while permanent vegetation is being established. Blankets can be made from different materials dependent on the length, pitch, and expected water velocity of the area to be protected. There are two major types of matting: temporary and permanent. Temporary blankets are degradable and are typically made of wood fibers, straw, or coconut. Non-degradable plastics are used in permanent mats; these offer long-term protection for critical areas.
Blankets have many benefits including seed protection, moisture retention, slope protection, and reduced water velocity.
A gabion is a large wire mesh box with multiple linked cells. When the cells are filled with rock, gabions provide stabilization for steep and highly erosive slopes.
Gabions can be used in applications such as retaining walls, channel stabilizations, and abutments where vegetation is not a practical alternative to stabilize the exposed slope. The baskets vary in size and depth and are linked with wire to form flexible building blocks. The rock used in gabions is typically four to eight inches in diameter.
Rock Check Dams
A rock check dam is a small temporary barrier constructed across a swale, drainage ditch, or area of concentrated flow. Check dams are used to filter sediment, reduce velocity, and stabilize grade.
Check dams are generally constructed of stone. The dam should extend the entire width of the ditch or swale and should be lower in the middle to encourage flowing water to remain in the center of the channel.
A sediment barrier is any type of temporary structure designed to prevent sediment carried by sheet flow from leaving a site. Sediment barriers slow storm water runoff and cause sediment to be deposited at the structure. Note that sediment barriers are not designed for areas of concentrated flow such as streams, ditches and waterways.
Silt fence is the most common sediment barrier. Types of silt fence vary based on the area being protected, the desired flow rate, and the length of the project. Wire reinforcement and steel posts are used in critical areas. Straw bales, sand bags, brush piles, and waddles are also used as sediment barriers.
Sediment barriers must be cleaned and inspected on a regular basis to ensure that they continue to function as intended. They can be removed when the site achieves its final stabilization.
Stabilized Construction Entrances and Exits
A stabilized construction site entrance is a short length of temporary pavement at the entrance to a construction site that serves to reduce the amount of clay, dirt and mud tracked into the adjoining roadway by vehicles leaving the site.
The paving is usually a six to twelve-inch layer of two to five inch aggregate. On sites here soft soil is present and/or sites where very heavy equipment is used, a layer of geotextile cloth is placed beneath the aggregate, to reduce the migration of the aggregate into the underlying soil.
Storm Drain Curb Inlet and Drop Inlet Protection
Formed around storm drain drop inlets, inlet sediment traps are designed to prevent sediment from entering storm drainage systems. All drop inlets that receive runoff prior to final stabilization should be protected with sediment traps.
Temporary stream crossings are used to prevent erosion and stream bank damage in flowing streams. Live streams should not be forded by construction equipment, as this causes permanent damage to the bank.
A temporary crossing can be a bridge or pipe structure that allows the watercourse to flow without being damaged by construction equipment. When the structure is removed, the stream should be restored to its original shape and properly stabilized. Permanent structures (a bridge or pipe) should be installed if the stream or creek will be crossed after construction is complete.
Turbidity reducing polymers
A turbidity reducing polymer is a substance that, when mixed with water, forms a coating that holds sediment in place. The sugar-like polymer is typically used on open spaces which are exposed to the elements and will not have vegetative cover applied in the near future.
The polymer is not harmful to the environment. Grass or other vegetation can be planted directly on top of the polymer coating.