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Restoration Project Analysis in Juneau Alaska by John Hudson

Community-Based Watershed Management Forum, March 2012, Juneau Alaska. Southeast Alaska Watershed Coalition

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Restoration Project Analysis in Juneau Alaska by John Hudson

  1. 1. Duck Creek Created Wetland20012009 An assessment of habitat restoration practices in Juneau John Hudson Shannon Seifert Juneau Fish and Wildlife Juneau Watershed Partnership Field Office
  2. 2. Outline• Project Goals• Methods• Summary statistics• Findings• Case studies• Recommendations
  3. 3. Project Goals• Inventory habitat improvement projects• Evaluate projects to inform future restoration practices• Identify projects that require additional habitat improvement
  4. 4. Methods1. Research2. Determine project goals and objectives3. Categorize projects4. Conduct field assessments/evaluations5. Report findings
  5. 5. Inventory StatisticsTotal projects identified 81Years 1983 to 2010Number of water bodies 20Goals and objectives 73Projects on impaired water bodies 49 (60%)Projects assessed 27
  6. 6. FindingsSuccessful•Fish passage improvement•Streambank stabilization•Created wetlands (borrow pits)•Stormwater managementMixed Success•Created wetlands (uplands)•Channel rehabilitation/relocation
  7. 7. Fish Passage ImprovementGoals:• Remove barriers to fish movement• Improve flow, debris, and sediment conveyance
  8. 8. Streambank stabilizationGoals:• Protect land, buildings, & bridges• Enhance riparian functionsGeneral outcome:Successful* Mendenhall River
  9. 9. Mendenhall River revetments 20101996 Mendenhall River
  10. 10. Riverbend Vintage Park Revetment Revetment (1996) (1997)2011Mendenhall River revetments
  11. 11. Channel Rehab/Relocation Goals:• Improve riparian & spawning habitat• Increase water quantity• Reduce flood riskOutcome: mixed success
  12. 12. Duck Cr. Channel Rehabilitation (1997-98)Goal: Improve spawning habitat1997 (Pre-construction) 1998 (Construction)
  13. 13. Duck Cr. Channel Rehabilitation (1997-98)1998 (Construction) 2010
  14. 14. Created Wetlands Goals: • Improve water quality • Improve or create fish and wildlife habitat • Mitigate wetland loss Outcome: mixed success2010
  15. 15. Pre-construction Post construction (2005) Duck Creek borrow pit at Nancy St. Goal: enhance fish and wildlife habitat, improve water quality Nancy Street Wetland, Duck Creek
  16. 16. 20062010 Nancy Street Wetland, Duck Creek
  17. 17. Pederson Hill Cr. - upland to wetland conversion (2006)2010
  18. 18. Auke Rec Bypass WetlandMitigation (1999)Goal: create 1 acre of emergentwetlands 2000 2006
  19. 19. Auke Rec Bypass Wetland Mitigation (1999)2004 2011
  20. 20. RecommendationsFuture and existing projects will benefit from:•Site specific project designs•Performance-based permit conditions and criteria•Technical oversight from concept development throughconstruction•Post-implementation maintenance•Compliance monitoring
  21. 21. QUESTIONSMichele Elfers
  22. 22. Stormwater ManagementGoal: Improve quality of urban runoffflowing into streams 2010 cha nn el 2010Duck Creek stormwater swale (2001) Jordan Creek basin (2007)
  23. 23. RevegetationDuck Creek Channel Relocate (1998) 20102010 2010
  24. 24. Factors influencing revegetationsuccess: • Soil quality • Species suitability for the site • Invasive plants • Lack of maintenance and follow-up • Revegetation goals (short-term erosion control or long-term riparian health) • Coir products – prevent erosion AND revegetation