Paul Spring Segment 1 at Hollin Hills Stream Restoration Project

1. A Fairfax County, VA, publication
Department of Public Works and Environmental Services
Working for You!
Paul Spring Segment 1
at Hollin Hills
Stream Restoration Project
December 2017

2. Stormwater Planning Division
Agenda
Introduction to the Design Process
Watershed
Existing Conditions
Next steps
Contact information
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3. Stormwater Planning Division
Design Team
• Community Members
• Hollin Hills Civic Association
• Land Acquisition
• Stantec
• Stormwater Planning
• Utilities Design and Construction
• Maintenance and Inspections
• Urban Forestry
• Wastewater
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4. Stormwater Planning Division
Social Goals
1. Maintain open dialog and share information.
2. Coordinate with all the stakeholders and the community.
3. Build partnerships with local organizations.
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5. Stormwater Planning Division
Stormwater 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 Facilities
• Public Safety /Emergency Response
– Flooding
– Snow Removal
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6. Stormwater Planning Division
Natural Channel Design (part 1)
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7. Stormwater Planning Division
Natural Channel Design (part 2)
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Minimize tree loss
Establish native
vegetation
Reconnect the floodplain

8. Little Hunting Creek Watershed
• 7,067 acres in Fairfax
County.
• One of the most developed
watersheds in Fairfax
County.
• Discharges into Potomac
River.
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https://www.fairfaxcounty.gov/dpwes/watersheds/littlehuntingcreek.htm
Stormwater Planning Division

9. Stormwater Planning Division
Historic Watershed
Figure 2.2 Map of Little
Hunting Creek drawn by
General George
Washington. From Little
Hunting Creek Watershed
Management Plan.
https://www.fairfaxcounty.gov/dpwes
/watersheds/littlehuntingcreek.htm
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10. Environmental Benefits
Improve watershed conditions and reduce downstream
impacts through….
Controlling quantity
Mitigate flooding where possible
Controlling velocity
Reduce erosion
Protect infrastructure
Improve buffer quality
10Stormwater Planning Division

11. Stormwater Planning Division
Project Goals
Restore up to 1,600 feet of stream in Goodman Park and
adjacent private lots*
Stabilize streambed and banks
Reduces sediment and nutrient inputs into stream system
Improve habitat
Protect Infrastructure (sanitary, water, etc.)
Maintain close coordination with stakeholders
*improvements on private lots requires separate easements
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12. Project Area
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Storm Outfall
Erosion
Martha’s Rd.
Stormwater Planning Division
Areas of flooding
Paul Spring Rd.
Sewer Repair

13. Stormwater Planning Division
Existing Conditions
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Bank erosion sends sediment and nutrients downstream.

14. Stormwater Planning Division
Existing Conditions
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Bank erosion sends sediment and nutrients downstream.

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Existing Conditions
Erosion undermines tree.
Tree becomes unstable and pulls out
bank.
Stormwater Planning Division

16. Stormwater Planning Division
Existing Conditions
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Tree falls cause and caused by bank failure.

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Existing Conditions
Stormwater Planning Division
Flooding causes trail washouts/loss of recreational value.

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Existing Conditions
Stormwater Planning Division
Flooding causes trail washouts/loss of recreational value.

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Non-native invasive species, like English ivy, are dominant in the stream valley.
Existing Conditions
Stormwater Planning Division

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Non-native invasive species, like bamboo, can limit revegetation success.
Existing Conditions
Stormwater Planning Division

21. Stormwater Planning Division
Typical Structures Used – Cross Vanes
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22. Stormwater Planning Division
Typical Structures Used – Root Wads
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23. Stormwater Planning Division
Video of Typical Structures Used
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24. Stormwater Planning Division
Construction Example
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25. Stormwater Planning Division
Construction Example
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26. Stormwater Planning Division
Construction Example
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27. Stormwater Planning Division
Construction Example
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28. Stormwater Planning Division
Construction Example
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29. Stormwater Planning Division
Construction Example
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30. Stormwater Planning Division
Growing Season Following Construction Completion
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31. Stormwater Planning Division
One Year After Construction Completion
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32. Stormwater Planning Division
Three Years After Construction Completion
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Before and After Examples
Big Rocky Run II
Before 1 year After
Stormwater Planning Division

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Before and After Examples
Rabbit Branch
Before
2 years After
Stormwater Planning Division

35. Before and After Examples
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Banks Park
Before 3 years After
Stormwater Planning Division

36. Stormwater Planning Division 36
Next Steps – Schedule
• Complete Stream Assessment – February 2018
• Conceptual Design – May/June 2018
• 35% Plan set
• Charrette and Public Input Meeting
• Land rights are secured – February – July 2018
• Easements must be obtained for project to continue
• Revisions, Refinements and Required Elements
• Design Complete – 2019
• Public Information Meeting
• Construction – Dependent upon future funding

37. Stormwater Planning Division 37
Next Steps – Advisory Committee
• Volunteers from Civic Association, neighborhood to serve on
the Advisory Committee (up to 4)
• Meetings are held Monday-Friday
• Meetings are held at 12000 Government Center Parkway
• Meetings are held between 9 and 4
• Be a member of the design team
• Approximately 4 meetings, spaced throughout the project
• Can’t join us for regular meetings? Sign up for the email list
(email addresses will be seen by other members) for periodic
updates as the project progresses

38. Online Resources
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Stormwater Planning Division Website
http://www.fairfaxcounty.gov/dpwes/stormwater/
Fairfax County Watershed Planning
http://www.fairfaxcounty.gov/nvswcd/newsletter/planning.htm
EPA Water Quality Laws and Regulations
http://www.epa.gov/water/laws.html
Stormwater Planning Division

39. Stormwater Planning Division
Contact Information
Contact Information
Design
Meghan Fellows– Project Manager
703-324-5807
Meghan.Fellows@fairfaxcounty.gov
Fairfax County Stormwater Planning Division
703-324-5500 TTY 711
12000 Government Center Parkway
Suite 449
Fairfax, Virginia 22035
www.fairfaxcounty.gov/dpwes/stormwater
To request this information in an alternate format call 703-324-5500, TTY 711.
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