Description: A coast-parallel, long or short structure built with the objective of reducing the wave action on the shoreline by forcing wave breaking over the sill. Sills are used to provide protection for existing coastal marshes, or to retain sandy fill between the sill and the eroding shoreline, to establish suitable elevations for the restoration, or establishment of coastal marsh and/or riparian vegetation.

CCAP Marsh Sill Policy
Requirements for all CCAP Practices

Maintenance Period: 5 years single-family home, 10 years all other properties.

Additional Spot Check Requirements: None

BMP Units: Linear Feet
Cost Information: Components are cost shared at 75% of actual cost up to a maximum of $5,000. See CCAP Average Cost List for details. 

CS2 Project Description examples

Expected Results:

• Soil loss reductions 
  • Use Streambank Erosion Calculator
  • Instructions for Streambank Erosion Calculator

Reference Materials: 
NC-CCAP 11 Signature Page
Map with BMP location, fields, and roads

JAA:
Coastal Area Management Act Permit

NRCS: None

Refer to the SWCC JAA Application Requirements for details.

Design Standards:

• 15A NCAC 07H .2700 - General Permit for the Construction Marsh Sills
• 15A NCAC 07H .2100 General Permit for Construction of Sheetpile Sill for Shoreline Protection in Easuarine and Public Trust Waters and Ocean Hazard Areas

Planning Tools:

• NC DEQ Coastal Management: Estuarine Shoreline Stabilization Options
• Living Shorelines Academy
• CCAP Vegetative Guidelines