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Colony Park and Woodlynne Project Information
 

Colony Park and Woodlynne Project Information

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Colony Park and Woodlynne Project Information

Colony Park and Woodlynne Project Information

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    Colony Park and Woodlynne Project Information Colony Park and Woodlynne Project Information Presentation Transcript

    • Colony Park Woodlynne (PC9131)Facility Maintenance and Retrofit
    • 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
    • Department of Public Works and Environmental Services (DPWES) Land CapitalDevelopment Solid Waste Stormwater Wastewater Facilities Services Maintenance Stormwater & Stormwater Planning Management Division Division
    • Environmental Services Watershed Projects Implementation Branch (WPIB)• House Flood Mitigation• Stream Restoration• Outfall Restoration• Site Retrofits• Detention Basin Retrofits• Regional Basin Retrofits
    • 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
    • CountywideWatershed Planning
    • 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
    • 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
    • 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
    • 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
    • Current Site Condition
    • Project Information
    • 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.
    • 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 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
    • 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
    • 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 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
    • 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