PowerPoint Presentation
Coon Branchat Annandale Community ParkStream Restoration
Project
April 2017
A Fairfax County, VA, publicationDepartment of Public Works and
Environmental ServicesWorking for You!
Stormwater Planning Division
AgendaSocial GoalsProgram DriversWatershed Environmental
BenefitsExisting ConditionsNext stepsContact information
2
Stormwater Planning Division
Social GoalsMaintain open dialog and share
information.Coordinate with all the stakeholders and the
community.Build partnerships with local organizations such as
Homeowners Associations.Design Team Stantec Consulting Services,
Stormwater Planning Division, Urban Forest Management Division,
Park Authority, and Utilities Design and Construction
Division.3
Stormwater Planning DivisionStormwater Program Drivers Municipal
Separate Storm Sewer Permit (MS-4)Chesapeake Bay Total Maximum
Daily Loads (TMDL)Regulates amount of pollutants in waterways
(Nitrogen, Phosphorus, and Total Suspended Solids )Local TMDLs
(sediment, bacteria, and PCBs)Maintenance of Existing FacilitiesDam
RegulationsPublic Safety /Emergency ResponseFloodingSnow
Removal4
Accotink Creek Watershed52 sq. mi. in Fairfax County.There are a
total of 16 sub-watersheds and 7 major tributaries within the
Accotink Creek watershed.Accotink Creek discharges into Accotink
Bay.5
http://www.fairfaxcounty.gov/dpwes/watersheds/accotinkcreek.htmStormwater
Planning Division
Environmental BenefitsImprove watershed conditions and reduce
downstream impacts through.Controlling quantityMitigate flooding
where possibleControlling velocityReduce erosionProtect
infrastructure
6Stormwater Planning Division
Stormwater Planning Division
Project GoalsRestore up to 1,900 feet of stream in Annandale
Community ParkStabilize streambed and banksReduces sediment and
nutrient inputs into stream systemImprove habitatProtect
Infrastructure (sanitary, water, etc.)Maintain close coordination
with stakeholders
7
Project Area Limits8Championship Dr.Lafayette Village Dr.Hirst
Dr.Estabrook Dr.Approximate limits of disturbanceStormwater
Planning DivisionHummer Rd.
Stormwater Planning Division
Existing Conditions9
Stormwater Planning Division
Existing Bank Conditions10
11Existing Bank ConditionsStormwater Planning Division
12Existing Bank Conditions
Erosion undermines tree.Tree becomes unstable and
leans.Stormwater Planning Division
12
13The tree falls down once roots are unable to compensate for
the lack of support.Existing Bank ConditionsStormwater Planning
Division
Existing Infrastructure14Stormwater Planning Division
Sanitary Sewer ManholeStormwater Pipe
Stormwater Planning Division
Typical Structures Used Cross Vanes15
Stormwater Planning Division
Typical Structures Used Root Wads16
Stormwater Planning Division
Video of Typical Structures Used17
Stormwater Planning Division
Construction Example18
Stormwater Planning Division
Construction Example19
Stormwater Planning Division
Construction Example20
Stormwater Planning Division
Construction Example21
Stormwater Planning Division
Construction Example22
Stormwater Planning Division
Construction Example23
Stormwater Planning Division
Growing Season Following Construction Completion24
Stormwater Planning Division
One Year After Construction Completion25
Stormwater Planning DivisionThree Years After Construction
Completion
26
Before and After Examples27
Banks ParkBeforeAfterStormwater Planning Division
28Before and After ExamplesBig Rocky Run IIBeforeAfter
Stormwater Planning Division
29Before and After ExamplesRabbit BranchBeforeAfterStormwater
Planning Division
Stormwater Planning Division30
Next Steps ScheduleComplete Stream Assessment May 2017
Conceptual Design September 2017
Design Complete 2019
Construction Dependent upon future funding
Online Resources31Stormwater Planning Division
Websitehttp://www.fairfaxcounty.gov/dpwes/stormwater/
Fairfax County Watershed
Planninghttp://www.fairfaxcounty.gov/nvswcd/newsletter/planning.htm
Accotink Creek Watershed
Planhttp://www.fairfaxcounty.gov/dpwes/watersheds/accotinkcreek.htm
EPA Water Quality Laws &
Regulationshttp://www.epa.gov/water/laws.html
Stormwater Planning Division
Stormwater Planning DivisionContact InformationContact
Information
DesignJasdeep Saini Project
[email protected] County
Stormwater Planning Division703-324-5500 TTY 71112000 Government
Center ParkwaySuite 449Fairfax, Virginia
22035www.fairfaxcounty.gov/dpwes/stormwater To request this
information in an alternate format call 703-324-5500, TTY 71132
