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Turkey Run at Langley High School Stream Restoration Public Meeting Sept. 16, 2014
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Middle Potomac Watershed Plan Implementation
Turkey Run at Langley High School
Stream Restoration Project
Public Meeting
September 16, 2014
Stormwater Planning Division
Department of Public Works and Environmental Services
Meeting Outline
• Fairfax County Stormwater Management
• Countywide Watershed Plan Implementation
• Project Introduction and Objectives
• Existing Conditions
• Proposed Improvements - Options
• Example Projects
• Questions?
Fairfax County Department of Public Works
and Environmental Services (DPWES)Department of Public Works and Environmental Services
Land Development
Services
CapitalFacilities
Solid Waste Stormwater
Stormwater Planning Division
Maintenance and Stormwater
Management Division
Wastewater
Stormwater Infrastructure
• Conveyance System
– 1,600 miles pipe and
paved channel
– 43,000 structures
– 6,800 outfalls
• Management Facilities
– 1,540 County Maintained
– 3,720 Privately Maintained
• State Regulated Dams
Service Drivers
In response to The Clean Water Act of 1972…
National Pollutant Discharge Elimination System (NPDES)
Virginia Stormwater Management Program (VSMP)
Regulations
Municipal Separate Storm Sewer Permit (MS4)
Total Maximum Daily Loads (TMDLs)
Chesapeake Bay
Local Streams
Countywide Watershed Planning
“Healthy Watersheds,
Healthy Communities”
• 30 Designated
Watersheds
• All 15 watershed plans
have been adopted by
Fairfax County
http://www.fairfaxcounty.gov/dpwes/watersheds/
Middle Potomac Watershed Plan
• Watershed
Characterization
– Water Quality Monitoring
– Land Use Change
– Pollutant Loading
• Structural Project
– 25 year plan
• Non-Structural Practices
– Policy and Regulations
http://www.fairfaxcounty.gov/dpwes/watersheds/
Turkey Run Watershed Plan
• Turkey Run has a drainage
area of 1.95 mi2
• Projects identified in the
watershed management plan
• Pond retrofits
• LID Stormwater Enhancements
• Stream Restoration
• Neighborhood Stormwater
Improvements
http://www.fairfaxcounty.gov/dpwes/stormwater
/projects/project_list.htm
Before
Wakefield Run Stream Restoration
After
Wakefield Run Stream Restoration
Before After
Rabbit Branch Stream Restoration
Before After
Turkey Run Stream
Restoration
Next Steps
• Conceptual Design
• Land Acquisition/Coordination
• Preliminary Design
• Public Meeting
• Final Design
• Project Construction
• Funding FY2016 or FY2017
• Community Coordination: Pardon our Dust
• Maintenance and Operation
Natural Channel Design
Background and Design Approach
Stream Design Approaches
Natural Channel Design
3 design approaches
1)Analog
2)Empirical
3)Analytical
Turkey Run at Langley High School
Stream Restoration
Concept Design
Examples
Looking upstream at boulder
rock toe and constructed
riffle
Looking upstream at boulder
rock toe – 2 and 3 courses
Modified Cross Vane
Modified Cross Vane
Cross Vane Cross Vane
Cross Vane
Step Pool
Infill mix comprised of
cobbles, gravels, sand, silt,
topsoil
Larger material, usually
cobble
Constructed Riffle
(aka Reinforced Streambed)
Riffle
Access
During
May 2010
Before
Feb. 2010
After
Sept. 2010
Ratna Pottumuthu, [email protected]
Matt Meyers, [email protected]
Stormwater Planning Division
Department of Public Works and Environmental Services
Fairfax County12000 Government Center Parkway, Suite 449
Fairfax, Virginia 22035
www.fairfaxcounty.gov/dpwes/stormwater
Questions ?
• Contact Information
A Fairfax County Publication, April 2014
ADA Statement: To request this information in an alternate format call 703-324-5500, TTY 711
