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Erosion Control Local Program

Hours: 8:00 - 5:00
Monday - Friday

Henderson County Erosion Control Local Program is led by Natalie J. Berry, P.E.

Essential Departmental Functions: Erosion Control is responsible for the following for soil erosion and sedimentation control for all unicorporated areas of Henderson County, as well as the City of Hendersonville, Village of Flat Rock, Town of Laurel Park and Town of Fletcher. Staff also sets on the Technical Review Committee as a voting member.

Erosion Control Resources

Erosion Control Ordinance click here

How to identify slopes click here

Reasons to control erosion click here

Ground Cover Notice click here

Quick Facts click here

Single Family Erosion Control Pamphlet click here

NC Erosion Control Design Manual click here

Table of Penalties click here

Self-Inspection requirements click here

NPDES Stormwater General Permit Requirements click here (projects received prior to Aug 3, 2011)

NPDES Stormwater General Permit Requirements click here (projects received on Aug 3, 2011 or later)

Engineering Design Downloads

• Natural Resources Conservation Services (NRCS) Hydraulics and Hydrology Tools and Models - Win TR-55
• Natural Resources Conservation Services (NRCS) Revised Universal Soil Loss Equation, Version 2
• Natural Resources Conservation Services (NRCS) - Conservation Engineering Tools and Documents
• Natural Resources Conservation Services (NRCS) - Steam Corridor Restoration
• Federal Highway Administration
• North Carolina Department of Transportation - Best Management Practices
• North Carolina Department of Transportation - Roadway Standard Drawings Library
• Maine DOT charts for embedded culverts - Fish Passage Policy & Design Guide (2nd edition / December 2004) Click here for pdf file.

Design Calculation Spreadsheets

• Sediment control measures (MS Excel)
• Sediment basin design (MS Excel)
• Rational method (MS Excel)
• Manning's "n" (MS Excel)
• Spillway capacity (MS Excel)
• Riprap outlet protection (MS Excel)
• NY riprap outlet protection (MS Excel)
• Plunge pool, submerged outlet (MS Excel)
• Plunge pool, cantilevered outlet (MS Excel)
  • Design Note 6: Riprap Lined Plunge Pool for Cantilevered Outlet (PDF)
• Open Channel Flow (all following are MS Excel)
  • Permissible velocity - vegetation
  • Tractive force - synthetic liner
  • Tractive force - riprap (mild slope)
  • Tractive force - riprap (steep slope)