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Huntington Levee Community Meeting: Feb. 23, 2016

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Huntington Levee Community Meeting: Feb. 23, 2016

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Huntington Levee Community Meeting: Feb. 23, 2016

  1. 1. Department of Public Works and Environmental Services Huntington Levee Community Meeting February 23, 2016
  2. 2. Building Design and Construction Division 2 Agenda Huntington Levee I. Project Background II. Design Updates III. Community Amenities IV. Construction V. Environmental Design VI. Flood Modeling Results VII. Permitting VIII. Community Outreach IX. Questions
  3. 3. Building Design and Construction Division 3 Project Background • June 2006 -160 homes were flooded from a storm event • 2009 – US Army Corps of Engineers (USACE) completed a study to evaluate flood damage reduction measures in the Huntington Community
  4. 4. Building Design and Construction Division 4 Project Background • November 6, 2012 – Fairfax County voters approved stormwater bond referendum to fund design and construction of flood damage reduction measures proposed by the USACE • June 2013 – Fairfax County awarded the levee design contract to ARCADIS • November 2013 – ARCADIS submitted the Phase I design package to Fairfax County • January 2014 – Fairfax County and Huntington Community reached consensus on conceptual design features • July 2014 – ARCADIS completed Hydraulic and Hydrologic Modelling for Cameron Run
  5. 5. Building Design and Construction Division 5 Project Background • September 2014 – ARCADIS submitted Schematic (30%) Design package to Fairfax County • October 2014 - Fairfax County conducted Value Engineering Workshop • June 2015 – ARCADIS submitted Design Development (60%) Design package to Fairfax County • July 2015 – Design review by Fairfax County and US Army Corps of Engineers • February 2016 – ARCADIS submitted Construction Documents (100%) Design package to Fairfax County • February 2016 – Technical review of Construction Documents
  6. 6. Building Design and Construction Division 6 Project Background Levee System
  7. 7. Building Design and Construction Division 7 Project Background Key Design Features • Earthen Levee/I-Wall Combination • Pump Station • Stormwater Diversion
  8. 8. Building Design and Construction Division 8 Design Updates Rendering – Looking West Levee I-Wall Open Channel Ponding Area Cameron Run
  9. 9. Building Design and Construction Division 9 Design Updates Rendering – Looking East from Top of Levee Trail Asphalt Trail Open Channel with Drains Ponding Area Ponding Area Slope Slope Slope
  10. 10. Building Design and Construction Division 10 Design Updates Rendering – Looking East with Cross Section Asphalt Trail Open Channel with Drains Ponding Area Ponding Area Slope Slope Slope
  11. 11. Building Design and Construction Division 11 Design Updates Open Channel • Shallow Channel Parallel to Levee • Overland Flow for Major Storm • Geo-Textile to Prevent Erosion • Drainage at Regular Intervals
  12. 12. Building Design and Construction Division 12 Design Updates Rendering – Looking East from Top of Levee Trail Asphalt Trail Concrete I-Wall Ponding Area
  13. 13. Building Design and Construction Division 13 Design Updates Rendering – Looking Northwest from Trail in Ponding Area Ponding Area Trail Open Channel Levee Ponding Area (Native Grasses)
  14. 14. Building Design and Construction Division 14 Design Updates Rendering – Looking Northeast Toward Pump Station Note: Fence with gate to be constructed around Pump Station
  15. 15. Building Design and Construction Division 15 Design Updates Rendering – Cross Section of Pump Station
  16. 16. Building Design and Construction Division 16 Community Amenities Trails Native Grasses in Ponding Area, Mowed 1-3 times per Year Trail Atop Levee Trail in Ponding Area Pump Station Existing Trail Service Drive
  17. 17. Building Design and Construction Division 17 Community Amenities Playground Area in Farrington Park • Worked with Community Group in Fall 2015 • Meeting Held with Volunteer Group November 18, 2015 • Separate Equipment for Age Groups • Swings: Well Liked, but would take up Most of the Park • Animal Theme • Maximize Equipment in Small Area
  18. 18. Building Design and Construction Division 18 Community Amenities Playground Area in Farrington Park – Proposed Design
  19. 19. Building Design and Construction Division 19 Construction Preliminary Planned Construction Access • Route A: Primary Construction Access • Route D: Secondary Access for Pump Station • Routes B and C: Possible Tertiary Construction Access
  20. 20. Building Design and Construction Division 20 Environmental Design Envision • Rating System for Infrastructure Projects • Bronze Level • Similar to LEED • 5 Categories: • Quality of Life • Leadership • Resource Allocation • Natural World • Climate and Risk
  21. 21. Building Design and Construction Division 21 Flood Modelling Results Protection of Homes from 100-Year Storm Flood elevation 1-ft below lowest home opening
  22. 22. Building Design and Construction Division 22 Flood Modelling Results 100-year Stormwater Ponding Some Street Flooding, but Water Surface Elevation Below Structures
  23. 23. Building Design and Construction Division 23 Flood Modelling Results 25-year Stormwater Ponding Some Street Flooding, but Water Surface Elevation Below Structures
  24. 24. Building Design and Construction Division 24 Flood Modelling Results 10-year Stormwater Ponding Some Street Flooding, but Water Surface Elevation Below Structures
  25. 25. Building Design and Construction Division 25 Permitting Update • In Process • Joint Permit Application (Wetlands) • Conditional Letter of Map Revision (CLOMR) • DEQ Permit • Building Permit • Site Permit • Completed • Zoning • Floodplain Study
  26. 26. Building Design and Construction Division 26 Schedule • Next Steps • Construction Documents (100%) Drawing Review – February 2016 • Bid Documents – May 2016 • Complete Permitting – August 2016 • Advertise/ Bid / Contract – Fall 2016 • Notice of Award to Contractor – December 2016 • Begin Construction – January 2017
  27. 27. Building Design and Construction Division 27 Schedule • Phase II (January 2014-Winter 2017)  Schematic Design (30%)  Design Development (60%) • Permitting (began March 2015) • Land Acquisition (began September 2014) • Construction Documents • Bidding • Phase III (Winter 2017-Spring 2019) • Construction Project Remains on Schedule
  28. 28. Building Design and Construction Division 28 Community Outreach
  29. 29. Building Design and Construction Division 29 Community Outreach
  30. 30. Building Design and Construction Division 30 Community Outreach • Bi-annually • Important Milestones • Next Community meeting – July/ August 2016 Community Meetings
  31. 31. Building Design and Construction Division 31 Community Outreach  Contact Information – Huntington Levee Project  Phone #: 703-324-5800  Email address: HuntingtonLevee@fairfaxcounty.gov  Contact Information – Stormwater Questions  Phone #: 703-324-5821  Email address: SWPDmail@fairfaxcounty.gov  Huntington Levee Website: www.fairfaxcounty.gov/dpwes/huntingtonlevee To request this document in an alternate format call 703-324-5800, TTY 711.

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