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Re: Lightweight backfill

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Greg Leyh wrote:
> Hi All,
> I am looking for a lightweight alternative to 'pea gravel'
> for backfilling to a treated wood retaining wall.  I have
> searched the SEAOC archives, but didn't find anything.
> I have heard of styrofoam pellets being used as backfill,
> and was wondering how they might weather, or if there would
> be any other adverse consequences (like raccoons eating them).
> Thanks in advance,
> -Greg Leyh

This backfill was once proposed for a highway bridge approach. There
were concerns that if there ever was an oil leak on the approach this
material would deteriorate an become ineffective.

Bruno Côté