Shoreline Erosion Control Utilizing

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• Shoreline Erosion Control Utilizing
• Living Shorelines

Scott Macomber, Angler Environmental


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Overview

• Living Shoreline Design Options
• Impact of HB 973/HB1253
• QA

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Considerations Regarding Design

• Landowner goals
• Shoreline protection, appearance, cost, water
  access
• Landscape considerations
• - Site assessment, physical constraints
• Plant selection and optimizing success
• - Selection of appropriate species, long term
  maintenance
• Implementation of design
• - Constructability

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Options for Living Shorelines

• Marsh creation
• Sand containment structures with marsh plantings
• Biolog designs
• Rock sills with marsh plantings

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Marsh Creation
VIMS Center for Coastal Resources Management
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Marsh Creation
NOAA Restoration Center
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Marsh Creation Benefits

• Straightforward approach for low energy sites
• Effective - 50 of wave energy absorbed in first
  8 feet of marsh
• Increases habitat
• Improves water quality
• Flood Control
• Durable

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Sand Containment Structures with Marsh Plantings
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Sand Containment Structures with Marsh Plantings
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Sand Containment Structure Benefits

• Provides energy dissipation in moderate to high
  energy environments
• Allows project to fit into existing footprints
• Increases habitat
• Improves water quality
• Flood Control
• Durable

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Biolog Structure Designs
NOAA Restoration Center
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Biolog Structure Designs
VIMS Center for Coastal Resources Management
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Biolog Structure Benefits

• Short medium term protection in low to moderate
  energy environments
• Flexible implementation
• Toe of slope protection
• Integration with other design options
• Increases habitat
• Improves water quality
• Flood Control

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Sill Design
S. alterniflora is planted from mean low water to
mean high water S. patens is planted above mean
high water
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Sills with Marsh Plantings
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Sills with Marsh Plantings
Gwen Shaughnessy - DNR
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Vented Sill
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Window/Vent Detail for Sill
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Sill Benefits

• Provides energy dissipation in moderate to high
  energy environments
• Fits into existing shorelines
• Increases habitat
• Improves water quality
• Flood Control
• Durable

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Major Design Factors

• Site Energy Characteristics
• Fetch distance wind travels over surface of
  water
• Depth of water
• Adjacent land use
• Orientation of property (N,S,E,W)

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Major Design Factors

• Shoreline Composition
• Bank height (steep vs. shallow vs. existing
  structures)
• Substrate (sand, mud, worse)
• Existing vegetation
• Potential shading issues
• Existing habitat of concern

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Major Design Factors

• Nearshore Environment
• Water depth
• Substrate
• SAV (presence or absence)
• Living Resources

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Design Summary

• Above issues all drive type and size of structure
  (s), which in turn drives costs
• Structures lt 35 channelward
• Require MDE review only
• Structures gt 35 channelward
• Require MDE and USACE review
• Therefore Design will drive permitting and
  construction costs

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HB973/HB1253

• Legislation requires MDE and DNR to develop
  regulations and implementation guidance
• Current schedule to complete promulgation and
  adoption is aggressive
• MDE Effective Date October 1, 2008
• Process is under way
• Potential exists for interim guidance from MDE

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HB973/HB1253

• Anticipated regulations will attempt to
• Provide stakeholders (property owners, designers,
  contractors, and regulators) with a predictable
  process to negotiate
• Encourage creativity in designs
• Rock structures will need windows
• Seek to address mitigation, Buffer clearing, and
  Buffer management issues

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HB973/HB1253

• Anticipated regulations will not aim to be a
  design manual
• Fee Waiver
• Living Shorelines are exempt from new MDE fee
  structure

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Links to Living Shoreline Resources

• http//shorelines.dnr.state.md.us/
• http//www.habitat.noaa.gov/restorationtechniques/
  public/shoreline_tab1.cfm
• http//www.mde.state.md.us/assets/document/wetland
  swaterways/Shoreerosion.pdf
• http//www.deq.state.va.us/coastal/livingshore.htm
  l
• http//ccrm.vims.edu/coastal_zone/living_shoreline
  s/index.html