Huntington Levee Community Meeting: Feb. 23, 2016

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


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


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


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


Project BackgroundLevee System


Project BackgroundKey Design Features

• Earthen Levee/I-Wall Combination• Pump Station • Stormwater Diversion


Design UpdatesRendering – Looking West

Levee I-WallOpen Channel

Ponding AreaCameron Run


Design UpdatesRendering – Looking East from Top of Levee Trail

Asphalt Trail

Open Channel with Drains

Ponding Area

Ponding Area

Slope SlopeSlope


Design UpdatesRendering – Looking East with Cross Section

Asphalt Trail

Open Channel with Drains

Ponding Area

Ponding Area

Slope SlopeSlope


Design UpdatesOpen Channel• Shallow Channel Parallel to Levee• Overland Flow for Major Storm• Geo-Textile to Prevent Erosion• Drainage at Regular Intervals


Design UpdatesRendering – Looking East from Top of Levee Trail

Asphalt Trail

Concrete I-Wall

Ponding Area


Design UpdatesRendering – Looking Northwest from Trail in Ponding Area

Ponding Area Trail

Open Channel

Levee

Ponding Area (Native Grasses)


Design UpdatesRendering – Looking Northeast Toward Pump Station

Note: Fence with gate to be constructed around Pump Station


Design UpdatesRendering – Cross Section of Pump Station


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


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


Community AmenitiesPlayground Area in Farrington Park – Proposed Design


ConstructionPreliminary Planned Construction Access

• Route A: Primary Construction Access• Route D: Secondary Access for Pump Station• Routes B and C: Possible Tertiary Construction Access


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


Flood Modelling ResultsProtection of Homes from 100-Year StormFlood elevation 1-ft below lowest home opening


Flood Modelling Results100-year Stormwater Ponding

Some Street Flooding, but Water Surface Elevation Below Structures








Permitting Update• In Process

• Joint Permit Application (Wetlands)

• Conditional Letter of Map Revision (CLOMR)

• DEQ Permit

• Building Permit

• Site Permit

• Completed

• Zoning

• Floodplain Study


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


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


Community Outreach


Community Outreach


Community Outreach

• Bi-annually• Important Milestones• Next Community meeting – July/ August 2016

Community Meetings


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.

mailto:[email protected]

mailto:[email protected]

http://www.fairfaxcounty.gov/dpwes/huntingtonlevee

News & Politics

Huntington Levee Community Meeting: Feb. 23, 2016