Page 44 - Section4.2.1-SWPPPCutSheet-FiltrexxStormWaterBlanket

Post-Construction | Section 2: Storm Water Management | 409

SWPPP Cut Sheet -2.10. Filtrexx ® Vegetated Retaining Walls

cover of the applied area has been vegetated or permanent vegetation has established. 3. Seeded Vegetated retaining walls may need to be irrigated in hot and dry weather and seasons, or arid and semi-arid climates to ensure vegetation establishment.

4. Where Vegetated retaining walls fail/become dislodged, the Contractor will ensure the product is in good contact with the soil and backfll, repair, and use additional staking if necessary. 5. Where bank or shoreline erosion occurs, the Contractor will regrade the soil if necessary and repair or replace the Vegetated retaining walls. 6. Where vegetation does not establish the Contractor will reseed, replant, replace live stakes, or provide an approved and functioning alternative.

7. If Vegetated retaining walls is only seeded at time of installation live stakes may be added to increase stability, aesthetics, wildlife habitat, and ecological succession.

8. No additional fertilizer or lime is required for vegetation establishment and maintenance. 9. Regular mowing of grass vegetation on seeded Vegetated retaining walls to a minimum height of 4 in (100mm) and a maximum height of 10in (250mm) will deter invasive weeds, allow sunlight to kill captured pathogens from storm water, and provide maximum sediment removal effciency and sediment storage capacity in the vegetation.

10. Storm debris and trash deposited on Vegetated retaining walls should be removed immediately.

11. Sediment shall be removed if it reaches 25% of the height of the vegetation (mowed) to prevent diversion of storm runoff and reduction of vegetation health and cover.

12. If drip tape irrigation system is installed, once vegetation is established, connections to drip tape irrigation system may be removed, leaving drip tape inside FilterSoxx tm .

Figure 10.1. Engineering Design Drawing for Filtrexx ® MSE Vegetated Retaining Wall.