Identify and evaluate house flooding and public safety concerns Improve drainage conditions to convey 100-year storm if feasible Reduce and treat stormwater runoff at the source Improve water quality and stream protection Use innovative & functional designs Make improvements compatible with characteristics of neighborhood Partner with community to develop sound, cost effective solutions that can be collaboratively implemented and maintained Build on lessons learned to help improve site development process for infill development

1. A Fairfax County, VA, publication
Department of Public Works and Environmental Services
Working for You!
Tucker Avenue Neighborhood Stormwater Improvement Project
Preliminary Design Review
Community Meeting
February 24, 2020
March 2020

2. Tucker Avenue Neighborhood
Stormwater Improvement Project
Community Information Meeting
Wednesday, March 11, 2020
Chesterbrook Elementary
1753 Kirby Rd, McLean
@JohnFoustva
@DranesvilleSupervisor Dranesville@FairfaxCounty.gov
https://www.fairfaxcounty.gov/dranesville/
WELCOME AND THANK YOU!

3. Tucker Avenue Neighborhood Stormwater Improvement Project
Stormwater Management
Meeting Logistics
3
• Meeting - recorded
• Muting: Everyone muted except host/co-host for duration of the presentation
• Questions:
– During presentation – please use chat box
– After presentation – everyone unmuted

4. Tucker Avenue Neighborhood Stormwater Improvement Project
Stormwater Management
Introductions
4
• Department of Public Works and Environmental Services (DPWES)
– Maintenance and Stormwater Management Division (MSMD)
– Stormwater Planning Division (SWPD)
– Wastewater Collection Division (WCD)
• Land Development Services (LDS)
• Northern Virginia Soil and Water Conservation District (NVSWCD)
• Virginia Department of Transportation (VDOT)
• Stantec – Design Consultants

5. Tucker Avenue Neighborhood Stormwater Improvement Project
Stormwater Management
Agenda
• Project Updates
– Objectives
– Project Status
– Existing Conditions
• Project area
• Existing Utilities
• Exiting flow pattern
– Preliminary Design
• Upper, Middle, Lower Tucker Designs
• Proposed flow pattern
– Utility Relocation
• Project Schedule and Next Steps
5

6. Tucker Avenue Neighborhood Stormwater Improvement Project
Stormwater Management
Objectives
• Identify and evaluate house flooding and public safety concerns
• Improve drainage conditions to convey 100-year storm if feasible
• Reduce and treat stormwater runoff at the source
• Improve water quality and stream protection
• Use innovative & functional designs
• Make improvements compatible with characteristics of neighborhood
• Partner with community to develop sound, cost effective solutions that can
be collaboratively implemented and maintained
• Build on lessons learned to help improve site development process for infill
development
6

7. Tucker Avenue Neighborhood Stormwater Improvement Project
Stormwater Management
Project Status
7
TASK STATUS
Topographic (Land) Survey, Utility Designation and sub-surface
borings to classify soils
Complete
Existing Condition Plans Complete
Concept Design Alternatives Complete
Easement needs and acquisition Ongoing
Utility test pits to verify depths Complete
Subsurface boring: infiltration tests Complete
Preliminary Design Draft for review
Maintenance and Operations of existing system Ongoing
Utility relocations Next Step

8. Tucker Avenue Neighborhood Stormwater Improvement Project
Stormwater Management
Existing Conditions – Project Area
8

9. Tucker Avenue Neighborhood Stormwater Improvement Project
Stormwater Management
Existing Conditions – division of project area
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Upper
Tucker
Middle
Tucker
Lower
Tucker

10. Tucker Avenue Neighborhood Stormwater Improvement Project
Stormwater Management
Existing Conditions Utilities
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Gas line
Water line
Sanitary sewer line
Storm sewer line
Telephone and electric
The location of existing utilities will
influence the design solutions
• Horizontal and vertical locations

11. Tucker Avenue Neighborhood Stormwater Improvement Project
Stormwater Management
Existing Conditions – Flow Pattern
11
Overland Flow Direction
Overland Flow Path
FEMA 100-Year Flood Elevation

12. Tucker Avenue Neighborhood Stormwater Improvement Project
Stormwater Management
Existing Conditions
12

13. Tucker Avenue Neighborhood Stormwater Improvement Project
Stormwater Management
Existing Conditions
13

14. Tucker Avenue Neighborhood Stormwater Improvement Project
Stormwater Management
Preliminary Design Layout
14

15. Tucker Avenue Neighborhood Stormwater Improvement Project
Stormwater Management
Upper Tucker – Existing Drainage Pattern
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Drainage Area
Approximately 30 Acres
Drains to Existing
Concrete Ditch

16. Tucker Avenue Neighborhood Stormwater Improvement Project
Stormwater Management
Upper Tucker – Design solutions – Split Drainage Flow Pattern
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Byrne, Upper Barbee and
Upper Birch drains to
upgraded pipe and improved
ditch – 20 AC
Upper Tucker Ave. and Lower
Birch to new pipe network on
Tucker Ave – 10 AC Drainage Area
Approximately 10 Acres
Drainage Area
Approximately 20 Acres
Design Highlights
- New pipe networks
 conveyance
- Green Infrastructures
 reduce/slow down flows
 improve water quality

17. Tucker Avenue Neighborhood Stormwater Improvement Project
Stormwater Management
Upper Tucker – Proposed Design Layout
17
Roadway with an Infiltration Trench

18. Tucker Avenue Neighborhood Stormwater Improvement Project
Stormwater Management
Upper Tucker – Proposed Design Layout
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Roadway with a Swale /Rain Garden

19. Tucker Avenue Neighborhood Stormwater Improvement Project
Stormwater Management
Middle Tucker Proposed Improvements/Flow pattern
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Total Drainage Area
Approximately 48
Acres - Drains to
Lower Tucker Ave.
Design Highlights
- Upgraded pipes
 increase capacity
- Existing concrete ditch replaced with
 a new pipe - conveyance
 a new swale - conveys overflow
in pipe and captures local
drainage
- New Pipe Network
- conveyance

20. Tucker Avenue Neighborhood Stormwater Improvement Project
Stormwater Management
Middle Tucker – Existing Concrete Ditch and Proposed Improvements
20

21. Tucker Avenue Neighborhood Stormwater Improvement Project
Stormwater Management
Middle Tucker – Proposed Layout
21
Yard Inlet
Yard inlets would be installed
along improved ditch

22. Tucker Avenue Neighborhood Stormwater Improvement Project
Stormwater Management
Lower Tucker Proposed Improvements/ Flow pattern
22
Total Drainage Area
Approximately 60 Acres
Drains to Pimmit Run
Only Local area to
improved ditch
New primary pipe system
bypasses existing pipe to
backyards
Design Highlights
- New Pipe network
- conveyance
- Improved ditch
- local area conveyance
- Upgraded pipes
 increase capacity
 New outfall
 safe discharge of flows
 Sanitary sewer relocation/addition

23. Tucker Avenue Neighborhood Stormwater Improvement Project
Stormwater Management
Utility Coordination and Relocation
23
Utility Conflicts
• Dominion Energy: ~ 17
• Washington Gas: ~20 for main crossings, ~45 service connections
• Fairfax Water : ~30 main lines, 47 service connections
• Verizon & Cox: ~21 crossings
These lines need to be relocated prior to the final design of the project
In addition, sewer laterals from house to the main sewer are in conflict
- relocated during construction
Sanitary Sewer Line and Private Laterals
Gas Line Relocation
Water Line Relocation

24. Franklin Park and Chesterbrook Neighborhood Stormwater Improvement Project
Stormwater Management
Example Construction – Bioretention and Infiltration Swales
• A total of 3,000 linear feet of stormwater improvements were
made that promote infiltration, improve water quality and safely
convey stormwater through the neighborhood to the local stream.
24
Amended Soil
Gravel Base and Under Drains Final Grass Cover

25. Franklin Park and Chesterbrook Neighborhood Stormwater Improvement Project
Stormwater Management
Example Construction – Stormwater Chamber & Infiltration System
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• Installation of underground chambers that provide storage and
promote infiltration.
• Grass sod provides an immediate finished look that fits into the
community landscape and simplifies long term maintenance.
Before
Before – Concrete Ditch
After – Grass Swale with Underground
Chambers with Infiltration System

26. Franklin Park and Chesterbrook Neighborhood Stormwater Improvement Project
Stormwater Management
Construction – Infiltration Swales with Check Dams
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• Check dams made with native soil and imbricated
stone slow down water and promote infiltration.
Check Dams
Imbricated Stone Check Dams

27. Tucker Avenue Neighborhood Stormwater Improvement Project
Stormwater Management
Project Schedule & Next Steps
27
• Easement Acquisition:
– On the final stretch of acquisition
• Land rights must be completed before final design and construction
• Preliminary Design (Draft): February 2021
• Community Meeting: December 2021
• Utility Relocation: Starts after preliminary design approval
• Final Design and Permitting: Winter, 2022
• Advertise for Bid - TBD (Dependent on future funding)
• Construction (18-24 months)

28. Tucker Avenue Neighborhood Stormwater Improvement Project
Stormwater Management
Additional Information
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Agency Inquiry Phone
Stormwater Planning Division Stormwater Capital Projects 703-324-5500
Maintenance and Stormwater
Management Division
Drainage Complaints 703-877-2800
Land Development Services Proposed and Active Development 703-324-1780
VDOT Road Repair and Stormwater
Maintenance in ROW
1-800-FOR- ROAD
(800-367-7623).
Northern Virginia Soil and Water
Conservation District
Homeowner support with drainage
problems
703-324-1460
https://www.fairfaxcounty.gov/publicworks/stormwater/plans-projects/tucker-avenue-
neighborhood-stormwater-improvement-project
For project updates, visit the project webpage:

29. Additional Information
For additional information, please contact
www.fairfaxcounty.gov/publicworks
Tucker Avenue Neighborhood Stormwater Improvement Project
Sajan Pokharel, Project Manager
Sajan.Pokharel@fairfaxcounty.gov
703-324-5500
Stormwater Management 29