hydroseedingHydroseeding is a hydraulic planting method that is the most up-to-date system known for planting lawns, ground covers and establishing plant material on slopes for erosion and dust control. All the materials (water, seed, fertilizer, and fiber mulching material) are combined in a large tank. They are thoroughly mixed, then sprayed through a high-pressure nozzle onto the ground.

After application the wet fiber molds and clings to the soil. The mulch protects the seeds during germination, and then it breaks down over time and provides nutrients for the new grass. With proper conditions, lawns can be ready to mow within 30 days.

One of the advantages of establishing plant material from seed is the great variety of seeds available in any number of combinations. The technique makes planting possible as a one-step application, under nearly all weather, soil, and slope conditions for a very low cost. Hydroseeding costs an average of 70% less than sod lawns, and there is a substantial savings of time.


Drill Seeding

drillseedingDrill seeding is a method of seeding/erosion control by which seeds are sown using a machine called a seed drill. A seed drill is a sowing device that precisely positions seeds in the soil and then covers them. In operation, the seed drill is pulled forward to allow the coulters to cut open the soil, with a metering mechanism on the hopper periodically allowing a number of seeds to fall into the tubes, and through them into the freshly cut soil. The result is a set of spaced seeding locations, which can then be covered by a built-in rake.

Seeding ground with grass or grain helps prevent the soil in the area from eroding, thus playing a critical role in maintaining the local ecosystem and the fertility of its farmland
CMG Hydroseeding  applies sustainable, native vegetation seed drilling to large areas such as; solar grid sites, solar farms, and wind turbine sites for containment and as a soil stabilizer for dust control, dust abatement, dust suppression, and, primarily, erosion control. In California’s various Air Control Districts, this process also helps reduce PM10 dust pollution from dry beds and washes.    

Dry-roll and water born erosion can be equally detrimental to the environment. In drier areas, where there is not enough water to hold the soil together, applying 60-80% vegetation can significantly reduce dry-roll erosion. In areas near or around water-ways or in areas with consistent precipitation, vegetation to otherwise unobstructed soil can reduce sediment disbursement and loss of existing vegetation.


Erosion Control BMP’s

Fiber Rolls (Straw Wattles)

Fiber Rolls (Straw Wattles) are installed on slopes, at active construction sites before soil disturbance begins. Fiber rolls are effective at trapping sediment. The rolls intercept surface storm water and construction runoff and reduce the velocity of flow. Water passes through a fiber roll while leaving behind the sediment on the uphill side of the roll, thereby reducing sediment erosion. Fiber rolls are a cost effective and safe way to help reduce water pollution and protect the environment.

Silt Fencefence

A silt fence is a temporary sediment barrier. It is made from woven, synthetic materials that allow water to seep through, but do not allow larger silt particles to pass. The materials are selected to withstand the elements. Silt fence is staked in place between the disturbed ground of a construction site and the waterway or drainage system that storm water or construction runoff would flow to. Silt fence is designed largely to catch sheet flow over a fairly broad area. It is not meant to be used in high-flow situations, like across a ditch or stream.

Erosion Control Blankets/ Mats, Pyramat®

Erosion Control Blankets/Mats  are biodegradable materials that can be used to protect disturbed slope and channel areas from wind and water erosion. The blanket materials are natural materials such as straw, wood excelsior, coconut, or are geotextile synthetic woven materials such as polypropylene.

blanketsErosion Control Blankets are effective in minimizing the erosive effect of rainfall when used to cover bare or newly planted soil on slopes. They are used to stabilize the soil to protect new plantings and reduce the potential for introducing sediment into storm water run-off. Erosion Control Blankets can be used for protection of newly graded slopes, open areas, or drainage swales to allow germination of seed mixes and plantings.

Pyramat® High Performance Turf Reinforcement Mats (HPTRMs) feature patented woven technology composed of a unique, three-dimensional matrix of polypropylene yarns. These yarns are designed in a uniform, dimensionally stable and homogenous configuration of pyramid-like structures, and they feature patented X3® fiber technology specially created to lock soil in place.

Pyramat® is used in high loading/traffic areas or steep slopes to provide superior erosion control. CMG has used this product in landfills to helps support and prevent soil erosion.