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Re: GBlist: Where to find bio-degradable silt fencing?



Hi, Greg--

Would one of the "geo-fabrics" work for you? These are meshes made of
biodegradable materials that lay over the soil and prevent it from being
eroded by heavy rains. Plants can be seeded or installed through the
fabric. They are widely used by highway departments, developers, commercial
landscape contractors, city agencies, etc. here in Portland.

We can also get "bio-bags, which are mesh bags filled with wood chips. The
bags hold the soil and eventually the mesh decomposes and the wood "mulch"
remains. These seem to work better than the poly fences.

Best, Mike

>Does anyone have a source for a bio-degradable silt fence, preferably with
>wooden
>stakes attached?  Recycled material would be a plus.
>
>We need to dredge the sediment pond, to restore it's capability to filter
>out sediment
>before the sediment reaches the lake.  Need to contain the excavated sediment
>behind
>a retaining wall. Seeking wall material that consumes little space and will
>eventually
>biodegrade, after plants take over and stabilize the retaining wall into
>a pond bank.
>
>
>The material should be capable of holding back a two foot depth of excavated
>sediment.
> It should also enable us to insert plants through it, into the sediment,
>so they
>can take root.  Ideally, the material
>would rot away after 2 years, and not hurt wildlife.
>
>I made a test wall using galvanized hog wire (2"X4" openings), and separately
>..
>orange plastic 'tree protection area' fencing, both covered by burlap. Both
>work,
>but I'm concerned they won't age well.
>
>Any references on how to successfully build a biodegradeable retaining wall
>would
>also be appreciated.
>
>Thanks,
>Greg N. Smith
>______________________________________________________________________
>This greenbuilding dialogue is sponsored by CREST <www.crest.org>
>Environmental Building News <www.ebuild.com> and Oikos <www.oikos.com>
>For  instructions send  e-mail to  greenbuilding-request@crest.org.
>______________________________________________________________________


O'Brien & Associates
Environmental Building Consultants
Portland General Electric Earth Smart program
obrien@hevanet.com


______________________________________________________________________
This greenbuilding dialogue is sponsored by CREST <www.crest.org>
Environmental Building News <www.ebuild.com> and Oikos <www.oikos.com>
For  instructions send  e-mail to  greenbuilding-request@crest.org.
______________________________________________________________________


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