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404 | Filtrexx ® Low Impact Design Manual | Version 8.0

interfow, subsurface fow and/or runoff. Additional drainage systems may be installed behind the wall. It is recommended that drainage requirements be addressed by a geotechnical engineer and/or hydrologist on a site-by-site basis.

Installation of Base Course: After initial site preparation, construction of the wall may begin. If utilizing a geogrid reinforcement or Filtrexx ® LockDown TM Netting, begin by laying the geogrid or LockDown TM Netting across the base of the wall on contour where the frst course of the FilterSoxx TM

is to be installed. Place the geogrid or LockDown TM Netting so that it extends suffciently upslope to be anchored but be sure to leave suffcient material to wrap around the FilterSoxx TM to anchor into the soil above. After a work plan is reached between the blower truck operator and wall installation team, the base course may be installed. The desired seed mix and/or additives should also be installed in the Seed Injection Unit(s) or otherwise premixed with the GrowingMedia TM . After the base course of FilterSoxx TM is installed, the LockDown TM Netting may be wrapped around the FilterSoxx TM and stapled with standard sod staples. Where needed, backfll may be placed either pneumatically or with heavy equipment.

Installation of Successive Courses : Successive courses will be set upon previous courses in a batter prescribed by the site engineer (1H:2V Typ). Continue placing FilterSoxx TM , and backfll as needed. The weight of successive layers will slightly compact the FilterSoxx TM . Walking along the courses of FilterSoxx TM or tamping them will ensure consistent settlement as well.

Capping : A number of options exist for capping Severe slope stabilization. In any case, it is important that the geogrid or LockDown TM Netting is suffciently buried below fnished grade. In most cases a single FilterSoxx TM can be placed at the top of the wall and backflled with topsoil or Filtrexx ® GrowingMedia TM . An application of Filtrexx ® Storm water blanket will connect the system with existing vegetation and help to reduce run-on/runoff volume and velocity fowing to the Severe slope stabilization system.

INSPECTION and MAINTENANCE

Field reviews to ensure seed and/or plant

establishment should occur at regular intervals after seeding or planting to assure germination and/or coverage of the wall system. At six months if complete coverage has not occurred it is recommended that reseeding or remedial planting be preformed.The

Severe slope stabilization system requires very little maintenance providing appropriate vegetation types are selected and drainage is addressed during the design and build stages. In arid climates or for use during the establishment stages, low volume, low pressure drip tape may be installed as part of the Severe slope stabilization system to ensure hydration to the vegetation. For specifc maintenance requirements in your area please contact Filtrexx ® International, LLC.