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Most importantly,

Professionals – Need some more technical references for Stormwater Management in the U.S Virgin Islands and other tropical islands? Check out these recommended guidebooks and manuals that were complied during the NOAA Coral Reef Conservation Program grant project, Sediment Reduction Education and Outreach in Coral Bay. Click on the images for the downloadable full reports and for the location to purchase the textbook: Designing and Reviewing Effective Sediment and Erosion Control Plans.

Virgin Islands Environmental Protection Handbook 2002 by University of the Virgin Islands Cooperative Extension Service (UVI-CES). A guidebook designed to assist professionals in implementing a stormwater, erosion and sediment control plan. Stormwater management in Pacific and Caribbean Islands A Practitioner's Guide to Implementing LID Low Impact Development
Unpaved Road Standards for Caribbean and Pacific Islands by Horsley Witten Group and Protectores de Cuencas
Designing and Reviewing Effective Sediment and Erosion Control Plans. The 3rd edition field manual that provides guidance from practical experience on stormwater BMPs for professionals (2011). By Dr. Jerald S. Fifield

 

 

Silt Fence Installation Tips

A silt fence is a temporary stormwater BMP (Best Management Practice) that controls erosion by allowing runoff water to gather, soak into the ground or evaporate, while sediment sinks. Silt fences are required for construction projects, and improper silt fencing is a code violation. They are relatively simple to construct with geotextile fabric and steel rebar posts. They are only effective when installed properly.

 

 DO

 DON’T

  • Install at level grade.
  • Use 3/8”–1/2“ steel rebar stakes for slopes greater than 20% grade.
  • Dig a trench and drive posts 18” into ground.
  • Bury fabric 6” deep, backfill and compact.
  • Add wire mesh backing on slopes greater than 50% grade.
  • Join fence sections by wrapping end post fabric together.
  • Place end posts 8 ft. upslope at 45 degrees.
  • Replace torn fabric and immediately repair any gaps between fence and ground by installing a rock filter outlet.
  • Remove sediment when it reaches ⅓ to ½ the fence height.
  • Maintain weekly and inspect after rains.Properly installed silt fence
  • Install without digging a trench and burying the fabric.
  • Space posts more than 8 ft. apart.
  • Use in extremely loose soils.
  • Install posts on uphill side of fence.
  • Install in a gut or swaleImproperly installed silt fencing on steep dirt hill and road

More details can be found in the 2002 VI Environmental Protection Handbook pages 3-22 to 3-23 – see link in list of resources above.

View the Silt Fencing Installation Methods presentation by Joe Mina, PE. He created this presentation specifically for the USVI under an EPA-CARE grant to CBCC.

Silt Fencing Installation Methods Presentation

Video: “How to Install a Silt Fence” from the NC Forestry Service. Note that wood posts are used in this video. In the USVI, steel rebar posts are preferred, and required for slopes greater than 20% grade.

//www.youtube.com/watch?v=ErVhDLbFW-c