great falls nike field stormwater enhancements 2012
DESCRIPTION
Great Falls Nike Field Stormwater Enhancements 2012 July 18, 2012TRANSCRIPT
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Public Information Meeting Installation of Athletic Field Lighting, Synthetic Turf and Related
Stormwater Enhancements on Rectangular Field #4 at Great Falls Nike Park
July 18, 2012
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Introductions
Dranesville District Supervisor’s Office
John Foust, Supervisor
Dranesville District Park Authority Board Member
Kevin Fay
Department of Public Works and Environmental Services
Craig Carinci, Director Stormwater Planning
Fred Rose, Chief Watershed Planning and Assessment
Emma Gutzler, Ecologist, Stormwater Planning
Fairfax County Public Schools
Steve Nicholson
Fairfax County Park Authority
David Bowden, Director Planning & Development Division
John Lehman, Manager, Project Management Branch
Deb Garris, Manager, Synthetic Turf Branch
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Meeting Agenda
Presentation: Park Authority
Overview of Project to Include Athletic Field Lighting Technology and
Performance Standards and Synthetic Turf Field Development
Presentation: Department of Public Works and
Environmental Services (DPWES)
Overview of Proposed Stormwater Enhancement Measures
Informal Discussions
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Funding Partnerships
Great Falls Nike #4 is a partnership between Great Falls Lacrosse and Department of Neighborhood and Community Services and Park Authority.
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Great Falls Nike Park
(1991 Master Plan)
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Orientation Map – Field #4
Great Falls Nike Park
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Increased Playability Estimated to increase playing capacity by 62% in
conjunction with the addition of lights, when compared to natural turf. Increases capacity on lighted existing field sites lessening the need for constructing additional fields.
Increased Durability Reduces field closure due to overuse, allowing fields to
remain open for the length of the season. Eliminates divots, bald spots, and uneven terrain of rigorously used natural turf fields.
Why Synthetic Turf?
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Why Synthetic Turf?
Lower Maintenance Costs Requires no mowing, fertilizing, pesticides or re-seeding.
Regular maintenance includes grooming and debris removal.
(continued)
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Quality Synthetic turf systems provide water quality improvement by
reducing phosphorus runoff to nearby streams and tributaries.
The synthetic turf system acts as a filter, capturing small amounts of physical and chemical contaminants.
Natural grass athletic fields often do not have healthy stands of grass due to over-use. The lack of healthy stands of grass increases the amount of sediment present in stormwater runoff.
Synthetic turf fields do not require the use of fertilizer and other chemicals that ultimately enter the natural stormwater system.
Stormwater Management Benefits of Synthetic Turf
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Standard Synthetic Field
Development Profile
Synthetic turf
Inlaid field line
Finish stone
Open graded aggregate base
Geo-textile fabric
Underdrain piping system
Subgrade
Natural grass
Concrete curb
BASE AND DRAINAGE SYSTEM DETAIL
Design meets the PFM requirements for stormwater management and BMP
Reduces the post development 2 YR and 10 YR peak runoff rates to less than predevelopment conditions
Reduces phosphorous by 15% which exceeds the PFM redevelopment requirements
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Enhanced Stormwater Retention - Stone Galleries
Provides water quality and volume reduction beyond the PFM requirements
Total Phosphorus Removal 1.2 lbs/year
Goal is to retain / infiltrate the 100 YR storm volume
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Piney Branch at Great Falls Nike Park
Drainage area of approximately 36 acres
Current project focuses on 3.5 acres
Working with Park Authority and Forestville Elementary on other opportunities
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Stormwater Enhancements
Goal: Maximize retention and infiltration of
stormwater at field #4
Reforestation
Organic Soil
Amendment
Stone Gallery
Underdrains Grassy Swale
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Stone Galleries
High measured infiltration rates
Captures water from 2.68 acres
Four linear stone galleries underlying the turf field
One along the southern endline
Temporary storage allowing infiltration
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Grassy Swale
Parallel along the western sideline
High measured infiltration rates
Treats stormwater from 0.40 acre
Reduces runoff, total phosphorus and total nitrogen
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Organic Soil Amendments
Around the field
Deeply tilled in organic compost
Restores soil porosity and increases infiltration
Insert close up photo of
compost (in hands??)
Insert photo of soil
amendments being
incorporated
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Reforestation
Native trees and shrubs on 0.44 acre
Encourages infiltration
Intercepts and filters runoff
Provides habitat
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Enhanced Stormwater Accomplishments
Additional retention of stormwater runoff from field #4
Reduced runoff = reduced pollutants
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Stone Base Installation
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Synthetic Turf Installation
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Installing Infill Materials
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Proposed Synthetic Turf Infill Options
“FutrFill – TPE (Thermo Plastic Elastomer) derived from an environmentally inert material process and Silica Sand Mixture
“PureFill” – Cork which is a totally organic product, 100% recyclable with no waste by‐products harvested from cork oak
trees every nine years and Silica Sand Mixture
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Completed Field With Inlays
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Replacement of Synthetic Turf
A well engineered sub-surface drainage system should be sustainable for two or three synthetic turf replacements
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Life Span
Synthetic
Turf
Natural
Turf
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Latest Lighting Control - Rectangle
• Example Rectangle
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Obtrusive Light
• Useful Light
• 3 Interrelated Elements
• Spill Light
• Glare
• Sky Glow
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Field Lighting History
• Before 1990
• Light Trespass Not Considered
• No Spillover Control
• Wooden Poles
• After 1990
• PA Addresses Light Trespass
• Concrete Polls
• Lighting Control
• Early
• Latest
• Shields
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Control of Obtrusive Light
• Shielded Fixtures
• Appropriate Pole Heights
• Downward Aiming Fixtures
• Optimum Aiming
• Fewer Fixtures
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Control of Obtrusive Light
• Shielded Fixtures
• Efficient Reflectors
• Reduces Energy Needs
• Maximize Light on Field
• Efficient Lamp Design
• Optimizes Light Output
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Light System Control
• Control Link
• Satellite
• Internet-based
• Phone
• Staffed Control Center
• Field Control Units
• System Monitoring
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Field Lighting Standards
IESNA Recommended Lighting
(fc) = foot candles
Class Rectangle Diamond Infield Diamond Outfield
III – High School 30 fc 50 fc 30 fc
IV – Low Recreation 20 fc 30 fc 20 fc
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Field Lighting Standards
Rectangle A Diamond & Rectangle B
Max Spill 0.3 fc 0.8 fc
Max Glare 7,000 c 12,000 c
• Max Spill – 150 feet
• Max Glare – 200 feet
• Property Line
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Saved for New Slide from Deb
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Example of Sports Illumination Plan
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Latest Lighting Control - Rectangle
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For more information contact:
Stormwater Planning
Emma Gutzler or Irene Haske
703-324-5500, TTY 711
Park Authority
Charles Mends-Cole
703-324-8640, TTY 711
www.fairfaxcounty.gov