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Subsurface Drainage/Underground Outlet

Subsurface Drainage/Underground Outlet. Mike Cox, SCE. Contractor Certification Training March 2008. Subsurface Drainage (606). Purpose: Improve the soil environment for vegetative growth by intercepting and preventing water movement into a wet area.

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Subsurface Drainage/Underground Outlet

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  1. Subsurface Drainage/Underground Outlet Mike Cox, SCE Contractor Certification Training March 2008

  2. Subsurface Drainage (606) • Purpose: Improve the soil environment for vegetative growth by intercepting and preventing water movement into a wet area. • Primarily used for drainage of grassed waterways in Indiana.

  3. Underground Outlet (620) • Purpose: Dispose of excess surface water without causing damage by flooding or erosion. • Primarily used to drain WASCOBs in Indiana.

  4. Minimum Depth • 2.0 feet in mineral soils • 2.5 feet in organic soils

  5. Requirements • No reverse grades • Tolerance-Grade to 0.1 % above • Flatter grades could require the drain size to increase. • Meet ASTM F-405 • 3 to 6 inch • Meet ASTM F-667 • 8 to 24 inch

  6. Requirements • Install Animal Guards

  7. Underground Outlet Installation Report http://www.in.nrcs.usda.gov/technical/engineering/engineering.html Look Under Contractor Certification Section

  8. Subsurface Drain Installation Report http://www.in.nrcs.usda.gov/technical/engineering/engineering.html Look Under Contractor Certification Section

  9. Helping People Help the Land

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