Department of Public Works and Environmental Services
Huntington LeveeCommunity Meeting
February 23, 2016
2Building Design and Construction Division
AgendaHuntington 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
3Building Design and Construction Division
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
4Building Design and Construction Division
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
5Building Design and Construction Division
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
6Building Design and Construction Division
Project BackgroundLevee System
7Building Design and Construction Division
Project BackgroundKey Design Features
• Earthen Levee/I-Wall Combination• Pump Station • Stormwater Diversion
8Building Design and Construction Division
Design UpdatesRendering – Looking West
Levee I-WallOpen Channel
Ponding AreaCameron Run
9Building Design and Construction Division
Design UpdatesRendering – Looking East from Top of Levee Trail
Asphalt Trail
Open Channel with Drains
Ponding Area
Ponding Area
Slope SlopeSlope
10Building Design and Construction Division
Design UpdatesRendering – Looking East with Cross Section
Asphalt Trail
Open Channel with Drains
Ponding Area
Ponding Area
Slope SlopeSlope
11Building Design and Construction Division
Design UpdatesOpen Channel• Shallow Channel Parallel to Levee• Overland Flow for Major Storm• Geo-Textile to Prevent Erosion• Drainage at Regular Intervals
12Building Design and Construction Division
Design UpdatesRendering – Looking East from Top of Levee Trail
Asphalt Trail
Concrete I-Wall
Ponding Area
13Building Design and Construction Division
Design UpdatesRendering – Looking Northwest from Trail in Ponding Area
Ponding Area Trail
Open Channel
Levee
Ponding Area (Native Grasses)
14Building Design and Construction Division
Design UpdatesRendering – Looking Northeast Toward Pump Station
Note: Fence with gate to be constructed around Pump Station
15Building Design and Construction Division
Design UpdatesRendering – Cross Section of Pump Station
16Building Design and Construction Division
Community AmenitiesTrails
Native Grasses in Ponding Area, Mowed 1-3 times per Year
Trail Atop Levee
Trail in Ponding Area
Pump Station
Existing Trail
Service Drive
17Building Design and Construction Division
Community AmenitiesPlayground 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
18Building Design and Construction Division
Community AmenitiesPlayground Area in Farrington Park – Proposed Design
19Building Design and Construction Division
ConstructionPreliminary Planned Construction Access
• Route A: Primary Construction Access• Route D: Secondary Access for Pump Station• Routes B and C: Possible Tertiary Construction Access
20Building Design and Construction Division
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
21Building Design and Construction Division
Flood Modelling ResultsProtection of Homes from 100-Year StormFlood elevation 1-ft below lowest home opening
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Flood Modelling Results100-year Stormwater Ponding
Some Street Flooding, but Water Surface Elevation Below Structures
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Flood Modelling Results25-year Stormwater Ponding
Some Street Flooding, but Water Surface Elevation Below Structures
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Flood Modelling Results10-year Stormwater Ponding
Some Street Flooding, but Water Surface Elevation Below Structures
25Building Design and Construction Division
Permitting Update• In Process
• Joint Permit Application (Wetlands)
• Conditional Letter of Map Revision (CLOMR)
• DEQ Permit
• Building Permit
• Site Permit
• Completed
• Zoning
• Floodplain Study
26Building Design and Construction Division
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
27Building Design and Construction Division
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
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Community Outreach
29Building Design and Construction Division
Community Outreach
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Community Outreach
• Bi-annually• Important Milestones• Next Community meeting – July/ August 2016
Community Meetings
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Community OutreachContact Information – Huntington Levee Project
Phone #: 703-324-5800 Email address: [email protected]
Contact Information – Stormwater Questions Phone #: 703-324-5821 Email address: [email protected]
Huntington Levee Website: www.fairfaxcounty.gov/dpwes/huntingtonlevee
To request this document in an alternate format call 703-324-5800, TTY 711.