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For 

Dam 

Removal 

 Workshop 

Hosted 

by  

 American 

Rivers

 June 14, 2011

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DWQ  and Dam Removal in NC

 DWQ has long been strong supporter of  dam removal 

 2004 Guidance

 2008 guidance

 Required Dillsboro dam removal for FERC relicensing 

for Duke Energy  hydros

  Agreed  with potential stream mitigation credits for 

Carbonton 

and 

Lowell 

Mill 

dam 

removals 

pending 

meeting performance standards at closeout

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Water Quality Benefits of  Dam Removal

 Restore rare, threatened and endangered species

 Cape Fear shiner  with Carbonton dam

  Appalachian elktoe  with Dillsboro dam

 Restore appropriate aquatic community 

 From poor to good‐fair/fair for aquatic insects  with 

Dillsboro dam

 Improve  water quality 

 Especially  dissolved oxygen, chlorophyll a from lakes

  Anadromous fish passage

  American shad  with Lowell mill dam 

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Carbonton dam

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Water Quality Concerns with Dam Removal

 Downstream sedimentation and turbidity   water quality  standard

 Document extent of  fine sediment and dredge  where needed

 Dillsboro dam dredged appx. 60,000 cubic  yards

  Wetland draining

 Document potential threat

 Develop plan to address including monitoring

 Headcutting of  tributaries

 Largely  unavoidable

  Address thru stabilization  where needed

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Dillsboro dam tributaries

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Permitting

 404 Permits often required

 If  404 required, then 401 Certification required

 Contact Corps of  Engineers early  and discuss 

permitting in all dam removal projects

 Pre‐application coordination crucial  with Corps, DWQ and resource agencies such as  WRC and US 

Fish and  Wildlife Service