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Department of Public Works and Environmental Services
Huntington Levee
Community Meeting
October 26, 2016
Building Design and Construction Division 2
Agenda
Huntington Levee
I. Project Background
II. Levee System Design
III. Con...
Building Design and Construction Division 3
Project Background
• June 2006 -160 homes were
flooded from a storm event
• 20...
Building Design and Construction Division 4
Project Background
• July 2014 – Hydraulic and Hydrologic Modelling for Camero...
Building Design and Construction Division 5
Levee System Design
Levee System
Building Design and Construction Division 6
Levee System Design
Key Design Features
• Earthen Levee/I-Wall Combination
• P...
Building Design and Construction Division 7
Levee System Design
Rendering – Looking West
Levee I-Wall
Open Channel
Ponding...
Building Design and Construction Division 8
Levee System Design
Rendering – Looking East with Cross Section
Asphalt
Trail
...
Building Design and Construction Division 9
Levee System Design
Rendering – Looking East from Top of Levee Trail
Asphalt T...
Building Design and Construction Division 10
Levee System Design
Rendering – Looking Northeast Toward Pump Station
Note: F...
Building Design and Construction Division 11
Levee System Design
Rendering – Cross Section of Pump Station
Building Design and Construction Division 12
Construction
Next Steps in Construction
Bids
Opened
Bid
Evaluation
County
App...
Building Design and Construction Division 13
Construction
Key Activities during Construction
Notice to
Proceed
Site
Manage...
Building Design and Construction Division 14
Site Management Plan
• Submitted by contractor 30 days after NTP
• Approved b...
Building Design and Construction Division 15
Contractor Restrictions
• Construction activities limited to 7:00am to 7:00pm...
Building Design and Construction Division 16
Construction
First Construction Activities
• Identification of Limits of Dist...
Building Design and Construction Division 17
Construction
Construction Extents
For General Reference – Actual Extent deter...
Building Design and Construction Division 18
Construction
Construction Access
• Route A: Primary Construction Access
• Rou...
Building Design and Construction Division 19
Community Amenities
Trails
• Native Grasses in Ponding Area, Mowed 1-3 times ...
Building Design and Construction Division 20
Community Amenities
Playground Area in Farrington Park
• Worked with Communit...
Building Design and Construction Division 21
Community Amenities
Playground Area in Farrington Park – Proposed Design
Building Design and Construction Division 22
Flood Modelling Results
Protection of Homes from 100-Year Storm
Flood elevati...
Building Design and Construction Division 23
Flood Modelling Results
100-year Stormwater Ponding
Some Street Flooding, but...
Building Design and Construction Division 24
Flood Modelling Results
25-year Stormwater Ponding
Some Street Flooding, but ...
Building Design and Construction Division 25
Flood Modelling Results
10-year Stormwater Ponding
Some Street Flooding, but ...
Building Design and Construction Division 26
Permitting Update
All Permitting Completed
• Joint Permit Application (Wetlan...
Building Design and Construction Division 27
Permitting Update
Permitting Requirements
• Construction Limits marked
with 4...
Building Design and Construction Division 28
Schedule
• Phase II (January 2014-Winter 2017)
 Schematic Design (30%)
 Des...
Building Design and Construction Division 29
Environmental Design
Envision
• Rating System for Infrastructure Projects
• B...
Building Design and Construction Division 30
Community Outreach
Building Design and Construction Division 31
Community Outreach
Building Design and Construction Division 32
Community Outreach
• Bi-annually
• Important Milestones
• Next Community meet...
Building Design and Construction Division 33
Community Outreach
• Similar to current response
• Contractor responsible to ...
Building Design and Construction Division 34
Community Outreach
 Contact Information – Huntington Levee Project
 Phone #...
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Huntington Levee Community Meeting: Oct. 26. 2016

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Huntington Levee Community Meeting: Oct. 26. 2016

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Huntington Levee Community Meeting: Oct. 26. 2016

  1. 1. Department of Public Works and Environmental Services Huntington Levee Community Meeting October 26, 2016
  2. 2. Building Design and Construction Division 2 Agenda Huntington Levee I. Project Background II. Levee System Design III. Construction IV. Community Amenities V. Flood Modeling Results VI. Permitting VII. Schedule VIII. Environmental Design IX. Community Outreach X. 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 • November 6, 2012 – Fairfax County voters approved stormwater bond referendum • November 2013 – Phase I design completed • January 2014 – Fairfax County and Huntington Community reached consensus on conceptual design features
  4. 4. Building Design and Construction Division 4 Project Background • July 2014 – Hydraulic and Hydrologic Modelling for Cameron Run • September 2014 – Schematic (30%) Design • October 2014 - Value Engineering Workshop • June 2015 – Design Development (60%) Design • February 2016 – Construction Documents (100%) Design • Spring 2016 – Technical review by County and Corps of Engineers • July 2016 – CLOMR approved by FEMA • August 2016 – Project advertised for bid to pre-qualified contractors • September 2016 – Wetlands permitting approved by DEQ and Corps of Engineers
  5. 5. Building Design and Construction Division 5 Levee System Design Levee System
  6. 6. Building Design and Construction Division 6 Levee System Design Key Design Features • Earthen Levee/I-Wall Combination • Pump Station • Stormwater Diversion
  7. 7. Building Design and Construction Division 7 Levee System Design Rendering – Looking West Levee I-Wall Open Channel Ponding Area Cameron Run
  8. 8. Building Design and Construction Division 8 Levee System Design Rendering – Looking East with Cross Section Asphalt Trail Open Channel with Drains Ponding Area Ponding Area Slope Slope Slope Sloped to Pump Station
  9. 9. Building Design and Construction Division 9 Levee System Design Rendering – Looking East from Top of Levee Trail Asphalt Trail Concrete I-Wall Ponding Area
  10. 10. Building Design and Construction Division 10 Levee System Design Rendering – Looking Northeast Toward Pump Station Note: Fence with gate to be constructed around Pump Station
  11. 11. Building Design and Construction Division 11 Levee System Design Rendering – Cross Section of Pump Station
  12. 12. Building Design and Construction Division 12 Construction Next Steps in Construction Bids Opened Bid Evaluation County Approval of Contract Notice of Award Notice to Proceed October 6, 2016 October 2016 November 2016 December 2016 January 2017
  13. 13. Building Design and Construction Division 13 Construction Key Activities during Construction Notice to Proceed Site Management Plan Contractor Mobilization Substantial Completion January 2017 January/ February 2017 January/ February 2017 February 2019
  14. 14. Building Design and Construction Division 14 Site Management Plan • Submitted by contractor 30 days after NTP • Approved by County Included in Site Management Plan • Phasing of Construction • Control of Water • Emergency Response Construction
  15. 15. Building Design and Construction Division 15 Contractor Restrictions • Construction activities limited to 7:00am to 7:00pm, Monday – Friday • Weekend and holiday work to be approved by County • Contractor parking prohibited in neighborhood • Truck traffic through neighborhood restricted • Noise per Fairfax County Noise Ordinance Construction
  16. 16. Building Design and Construction Division 16 Construction First Construction Activities • Identification of Limits of Disturbance • Safety Fencing • Erosion and Sediment Control • Construction of Access Road
  17. 17. Building Design and Construction Division 17 Construction Construction Extents For General Reference – Actual Extent determined by Contractor Construction Safety Fence around Site Perimeter Construction Access Road Utility Work Location of Pump Station
  18. 18. Building Design and Construction Division 18 Construction Construction Access • Route A: Primary Construction Access • Route D: Secondary Access for Pump Station • Routes B and C: Possible Tertiary Construction Access
  19. 19. Building Design and Construction Division 19 Community Amenities Trails • Native Grasses in Ponding Area, Mowed 1-3 times per Year • Coarse Turf Grass on Levee Trail Atop Levee Trail in Ponding Area Pump Station Existing Trail Service Drive
  20. 20. Building Design and Construction Division 20 Community Amenities Playground Area in Farrington Park • Worked with Community Group in Fall 2015 • Separate Equipment for Age Groups • Construction in December 2016/ January 2017
  21. 21. Building Design and Construction Division 21 Community Amenities Playground Area in Farrington Park – Proposed Design
  22. 22. Building Design and Construction Division 22 Flood Modelling Results Protection of Homes from 100-Year Storm Flood elevation 1-ft below lowest home opening
  23. 23. Building Design and Construction Division 23 Flood Modelling Results 100-year Stormwater Ponding Some Street Flooding, but Water Surface Elevation Below Structures
  24. 24. Building Design and Construction Division 24 Flood Modelling Results 25-year Stormwater Ponding Some Street Flooding, but Water Surface Elevation Below Structures
  25. 25. Building Design and Construction Division 25 Flood Modelling Results 10-year Stormwater Ponding Some Street Flooding, but Water Surface Elevation Below Structures
  26. 26. Building Design and Construction Division 26 Permitting Update All Permitting Completed • Joint Permit Application (Wetlands) • Conditional Letter of Map Revision (CLOMR) • DEQ Stormwater Permit • Building Permit • Site Permit • Zoning • Floodplain Study
  27. 27. Building Design and Construction Division 27 Permitting Update Permitting Requirements • Construction Limits marked with 4-foot tall orange fencing • Non-impacted surface waters with 50-feet of construction limits clearly demarcated • Monthly DEQ inspection checklist • Inspections by DEQ and US Army Corps of Engineers Tree Preservation Areas Levee
  28. 28. Building Design and Construction Division 28 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
  29. 29. Building Design and Construction Division 29 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
  30. 30. Building Design and Construction Division 30 Community Outreach
  31. 31. Building Design and Construction Division 31 Community Outreach
  32. 32. Building Design and Construction Division 32 Community Outreach • Bi-annually • Important Milestones • Next Community meeting – Spring 2017 Community Meetings
  33. 33. Building Design and Construction Division 33 Community Outreach • Similar to current response • Contractor responsible to maintain current condition (no worse) • Temporary pumping as needed • Contractor will be notified when County dispatches to site Storm Events
  34. 34. Building Design and Construction Division 34 Community Outreach  Contact Information – Huntington Levee Project  Phone #: 703-324-5800  Email address: HuntingtonLevee@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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