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Erosion Control Toolbox
Planning & Design
Improve Soil Health
- Soil Rehabilitation
- Local Topsoil
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- Contour Grading and Slope Rounding
- Decompact Soil
- Incorporate Materials
Improve Soil Health & Provide Cover
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Steep Slope Techniques
- Stepped Slope
- Cellular Confinement
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- TransPlant Application
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- Brush Layering
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Cellular Confinement System (Nonstandard)
What is This Treatment?
This treatment is composed of a geotextile material that forms cells that can be fastened to the slope with anchor pins. Once fastened in place, these cells can be backfilled with Local Topsoil and vegetated. As these cells typically run between 4" - 8" inches deep, this approach provides a greater soil volume than traditional hydroseeding, allowing for a more successful establishment of long-term, sustainable vegetation.
When to Use This Treatment?
- Cut slopes that are 1.5:1 (H:V) and flatter.
- To use this product on slopes steeper than 2:1 (H:V) a Geotechnical Design Report should be prepared by the Division of Engineering Services (DES) Geotechnical Design Unit. In addition, a preliminary evaluation may be required by DES Geotechnical Design.
- Use of this product should be coordinated with the Division of Engineering Services (DES) Geotechnical Design Unit.
- To use Cellular Confinement in a stream or channel below the 100-year base flood elevation will be determined by the responsible charge Engineer. Planting or incorporation of seed proposed by the Landscape Architect in conjunction with the Cellular Confinement will be evaluated by the responsible charge Engineer to verify hydraulic impacts of mature vegetation.
- Provides immediate slope reinforcement from unrooted brush cuttings and horizontal geosynthetics. As roots develop, improves slope stability and shear resistance by creating a rooting matrix.
- Creates a vegetative filter.
- Increases infiltration on dry sites.
- Provides for vegetation establishment, cover, and natural recruitment.
- Unsuitable for rocky slopes, needs soil for fastening.
- Must have solid footing.
- Specifications and details are under development.
Consider Using With:
To effectively treat sites with poor soils (compacted, sterile or poorly draining), consider combining this treatment with:
Plans and Details:
- No standard plans or details currently available.
- Cellular Confinement System prices vary but typically run about $45,000 - 80,000/acre.
- No standard BEES code.
- California Department of Transportation, "Performance of Erosion Control Treatments on Reapplied Topsoil", May 2005.
- Caltrans Erosion Control New Technology Report, Topsoiling With Cellular Confinement, June 2003
- Caltrans Division of Environmental Analysis Stormwater Program, "Cellular Confinement System Research" Accessed 2009-07-31.
- David W. Yam, " Slope Face Stabilization For Critical Slope Surfaces", State of California, Department of Transportation, District 04, 2008.
- Gray D.H. and Leiser A.T. "Biotechnical Slope Protection and Erosion Control", Van Nostrand and Reinhold Company Inc., New York 1982, pg. 26.
- Hoek E. and Bray J.W. "Rock Slope Engineering", The Institution of Mining and metallurgy, London 1981 pg. 27
- Soil Stabilization Products Company, Inc. 18 Years of Problem Solving With Caltrans Accessed 2009-10-01.