Colony Park        Woodlynne         (PC9131)Facility Maintenance and Retrofit
Tonight’s Meeting Agenda•   What is the Stormwater Planning Division?•   Environmental Services•   Watershed Planning•   S...
Department of Public Works and     Environmental Services                            (DPWES)   Land               CapitalD...
Environmental Services          Watershed Projects Implementation Branch                           (WPIB)•   House Flood M...
Service Drivers• Federal  – Clean Water Act of 1987    • Municipal Separate Storm Sewer (MS4) Permit  – Total Maximum Dail...
CountywideWatershed Planning
Reasons for Countywide Watershed                   PlanningTo restore and protect streams in the county, of which 80 perce...
Pohick Creek Watershed            Watersheds/Drainage Areas            • Drains directly to the Potomac              River...
Stormwater ProjectsSocial Goals and Objectives1.   Communicate with neighborhood members2.   Inform neighborhood members o...
Detention Basin RetrofitEcological Goals and ObjectivesRetrofit - Improve Water Quality  – Extend flow path with retrofit ...
Current Site Condition
Project Information
Showy Meadow Mix          Scientific Name                        Common Name                Percent of Mix         Showy M...
Design Plan for Government Center     Detention Basin Retrofit
Before Construction
During Construction
Immediately After
Soon After
3 years after
Stream restoration before
Stream Restoration after
Next Steps…Feasibility study (to be completed March, 2013)Stakeholder meetingAssessment of the watershedDevelopment of Con...
Post Construction Activity   Plantings   – Within 30 days of construction completion   Maintenance          – Annual inspe...
Fred Oaks project                EXISTING CONDITIONS PRIOR TO                       CONSTRUCTION
CLEARING and GRADING
INSTALLING GROUND CONTROL
VIEW OF FINAL PROJECTREFORESTATION OF SLOPES TO FOLLOW IN THE FALL
Sequoia Pond retrofit                        Before Construction
Construction:Construction: Rock Structure Placementof Channels             Pond Excavation and Formation
Construction: Installation of Concrete Riser Structure
Construction: Pond Stabilization
Completion: View of Outfall Channels and Low Flow Drainage Way
Completion: Access Road Utilizing Grass-Pavers
Completed Pond Retrofit
Cinnamon Oaks
ResourcesStormwater Planning Division Websitehttp://www.fairfaxcounty.gov/dpwes/stormwater/Fairfax County Watershed Planni...
Thank you             Contact Information                           Holly Moran, P.E. – Engineer                          ...
Colony Park and Woodlynne Project Information
Colony Park and Woodlynne Project Information
Colony Park and Woodlynne Project Information
Colony Park and Woodlynne Project Information
Colony Park and Woodlynne Project Information
Colony Park and Woodlynne Project Information
Colony Park and Woodlynne Project Information
Colony Park and Woodlynne Project Information
Colony Park and Woodlynne Project Information
Colony Park and Woodlynne Project Information
Colony Park and Woodlynne Project Information
Colony Park and Woodlynne Project Information
Colony Park and Woodlynne Project Information
Colony Park and Woodlynne Project Information
Colony Park and Woodlynne Project Information
Colony Park and Woodlynne Project Information
Colony Park and Woodlynne Project Information
Colony Park and Woodlynne Project Information
Colony Park and Woodlynne Project Information
Colony Park and Woodlynne Project Information
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Colony Park and Woodlynne Project Information

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Colony Park and Woodlynne Project Information

  1. 1. Colony Park Woodlynne (PC9131)Facility Maintenance and Retrofit
  2. 2. Tonight’s Meeting Agenda• What is the Stormwater Planning Division?• Environmental Services• Watershed Planning• Stormwater Project Goals and Objectives• Project Information, Examples• Next Steps – Questions and Answers
  3. 3. Department of Public Works and Environmental Services (DPWES) Land CapitalDevelopment Solid Waste Stormwater Wastewater Facilities Services Maintenance Stormwater & Stormwater Planning Management Division Division
  4. 4. Environmental Services Watershed Projects Implementation Branch (WPIB)• House Flood Mitigation• Stream Restoration• Outfall Restoration• Site Retrofits• Detention Basin Retrofits• Regional Basin Retrofits
  5. 5. Service Drivers• Federal – Clean Water Act of 1987 • Municipal Separate Storm Sewer (MS4) Permit – Total Maximum Daily Loads (TMDL)• Commonwealth – Virginia Stormwater Management Act – Chesapeake Bay Preservation Act
  6. 6. CountywideWatershed Planning
  7. 7. Reasons for Countywide Watershed PlanningTo restore and protect streams in the county, of which 80 percent arecategorized as being in “fair” to “very poor” conditionTo help meet state and federal water quality standards by identifyingstrategies to prevent and remove pollutionTo support Virginia’s commitment toward cleaning up the Chesapeake BayTo update the watershed management plans and incorporate the use of newtechnologiesTo take a comprehensive approach in addressing multiple regulations,commitments and community needs
  8. 8. Pohick Creek Watershed Watersheds/Drainage Areas • Drains directly to the Potomac River through Gunston Cove • 36.5 square miles • 180 miles of streams For more details: http://www.fairfaxcounty.gov/dpwes/wa tersheds/pohickcreek_docs.htm
  9. 9. Stormwater ProjectsSocial Goals and Objectives1. Communicate with neighborhood members2. Inform neighborhood members of project objectives and goals3. Continue to coordinate and share information with the community
  10. 10. Detention Basin RetrofitEcological Goals and ObjectivesRetrofit - Improve Water Quality – Extend flow path with retrofit features • Remove concrete trickle ditch, create extended flow path • Forebays • Micropools – Future maintenance • Sediment removal – Reduce downstream impacts
  11. 11. Current Site Condition
  12. 12. Project Information
  13. 13. Showy Meadow Mix Scientific Name Common Name Percent of Mix Showy Meadow Mix Andropogon virginicus Broomsedge 6 Asclepias tuberosa Butterfly Weed 8 Chamaecrisista fasciculata Partridge Pea 5 Coreopsis lanceolata Lance-Leaf Coreopsis 6 Heliopsis helianthoides Oxeye Sunflower 1 Liastris spicata Marsh Blazing Star 8 Lupinus perennis Wild Blue Lupine 4 Penstemon digitalis Tall White Beard Tongue 4 Rudbeckia hirta Black Eyed Susan 5 Schizachyrium scoparium Little Bluestem 34 Solidago juncea Early Goldenrod 1 Sorghastrum nutans, Tomahawk Indian Grass 10 Tridens flavus Purple-top Tridens 5 Zizia aurea Golden Alexanders 3 Total: 100% Cover Crop Lolium multiflorum Annual rye Total: 100%Apply 3-inch blanket of specified compost prior to or during seed application.First till existing soil to a depth of 8-inches to loosen soil and kill turf. Compost shallbe Soilmate Compost available from Loudoun Composting44150 Wade Drive,Chantilly, VA 20152, Phone: 703-327-8428, FAX: 703-327-0649 or an approvedequal. The paper work, samples and STA certifications for all alternates shall besubmitted and approved prior to purchase. Alternates must be STA approved by theU.S. Composting Councils Seal of Testing Assurance Program.Broadcast, pump or hand seed at ¾lb/1000 ft2 and annual rye (Lolium multiflorum) at1lb/1000 ft2 on top of applied 3-inch blanket of specified compost. Immediately coverwith light straw mulch for stabilization and moisture retention. Eliminate straw if theseed is integrated into the compost and pumped on. Substitute winter wheat for annualrye if seeding after October 1. Reseed and mulch all areas with less than 80%germination.Custom pure live seed (PLS) ERNST mix or approved equivalent. Seed can bepurchased through ERNST Conservation Seeds at 9006 Mercer Pike, Meadville,Pennsylvania 16335;(800) 873-3321 (Toll Free); (814) 336-2404 (Phone); (814) 336-5191 (Fax). The paper work, samples and certifications for all alternates shall besubmitted and approved prior to purchase.
  14. 14. Design Plan for Government Center Detention Basin Retrofit
  15. 15. Before Construction
  16. 16. During Construction
  17. 17. Immediately After
  18. 18. Soon After
  19. 19. 3 years after
  20. 20. Stream restoration before
  21. 21. Stream Restoration after
  22. 22. Next Steps…Feasibility study (to be completed March, 2013)Stakeholder meetingAssessment of the watershedDevelopment of Conceptual DesignsSurveyRequest of necessary easements (by mid of April, 2013)Stormwater and maintenance accessPreliminary Design (May, 2013)Develop the conceptual design into a plan setFinal Design (June, 2013)Preliminary design is developed into a construction ready plan set.Construction (September 2013) Public bid process Construction notification Construction
  23. 23. Post Construction Activity Plantings – Within 30 days of construction completion Maintenance – Annual inspection and mowing (if required) – Monitoring performed to ensure proper function and identify need for future maintenance
  24. 24. Fred Oaks project EXISTING CONDITIONS PRIOR TO CONSTRUCTION
  25. 25. CLEARING and GRADING
  26. 26. INSTALLING GROUND CONTROL
  27. 27. VIEW OF FINAL PROJECTREFORESTATION OF SLOPES TO FOLLOW IN THE FALL
  28. 28. Sequoia Pond retrofit Before Construction
  29. 29. Construction:Construction: Rock Structure Placementof Channels Pond Excavation and Formation
  30. 30. Construction: Installation of Concrete Riser Structure
  31. 31. Construction: Pond Stabilization
  32. 32. Completion: View of Outfall Channels and Low Flow Drainage Way
  33. 33. Completion: Access Road Utilizing Grass-Pavers
  34. 34. Completed Pond Retrofit
  35. 35. Cinnamon Oaks
  36. 36. ResourcesStormwater Planning Division Websitehttp://www.fairfaxcounty.gov/dpwes/stormwater/Fairfax County Watershed Planninghttp://www.fairfaxcounty.gov/nvswcd/newsletter/planning.htmPohick Creek Watershed Planhttp://www.fairfaxcounty.gov/dpwes/watersheds/pohickcreek_docs.htmEPA Water Quality Laws and Regulationshttp://www.epa.gov/water/laws.html
  37. 37. Thank you Contact Information Holly Moran, P.E. – Engineer 703-324-5613 Holly.Moran@fairfaxcounty.gov Justin Pistore – Project Manager 703-324-5685A Fairfax County, justin.pistore@fairfaxcounty.gov VA Publication March 2013 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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