cafo designs at delaware park prepared for: october 24, 2006 ninth annual wetlands & watersheds...
TRANSCRIPT
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CAFO Designs at Delaware Park
Prepared for:
October 24, 2006
NINTH ANNUAL WETLANDS & WATERSHEDS WORKSHOP
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Design and Effects on Hydrology and Plant Diversity in Aquatic
Environments
Presented by Duffield Associates
Keith M. Horner, CCR
and
Al M.Demerich, R.L.A., A.S.L.A.
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What is Delaware Park?
A multi-dimensional establishment featuring horse racing, casino slots, and an 18-hole
championship golf course located in Stanton, DE.
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Located in the fall zone between the Piedmont and Coastal Plain, adjacent to the Mill Creek and White Clay Creek (Wild and Scenic River)
Mill Creek
White Clay Creek
Barns and Stables
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Watersheds
Taken from NCC eParcelView Map
White Clay Creek
Christina River
Site
Delaware River
Red Clay Creek
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White Clay Creek (Wild and Scenic River)
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Comprehensive Approach to Stewardship
• Stream Restoration
• Reforestation
• Native meadows
• Green technology
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CAFO
• Concentrated• Animal• Feeding • Operation
•Delaware’s program became effective on September 11, 2005, as required by the EPA under the Clean Water Act
•Primary goal is to eliminate the discharge of pollutants
•Delaware Park submitted an NOI to comply with CAFO regulations and completed implementation during the spring of 2006
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Project Goals
A two-fold goal to address the concentration of non-point source pollution as a means to enhance watershed quality
• Treat run-off from daily equine operations and remove run-off from the stormwater system
• Direct stormwater run-off away from barns and stables
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Equine Activity
Total
CapacityMarch-
MayJune-Oct
Nov Dec-Feb
1475 1000 1350 750Less than
100
In 2005, this generated 27,006,397 lbs of straw and wood shavings
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Treating Daily Equine Operations
1. Wash stalls- carries run-off directly to the sewer system, bypassing the stormwater ditch system
2. Manure bins- carport roofing limits potential for nutrient run-off
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Wash stalls
Concrete pads Drains directly to sewer system
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Manure bins
Carport roofing system
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Treating run-off from parking areas
• Rain gardens
• Bio-retention facility
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Components of rain gardens
• Green technology BMP “best management practice”
• Grading
• Plant Material
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Grading
• Reduces run-off velocity
• Heavier material settles out (sedimentation)
• Allows plant material more time for water uptake
• Helps remove excess nutrients and bacteria
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Plant Material
• Native plant material
• Plugs vs seeds
• Acclimates and establishes quickly
• Limits erosion potential
• Reduces invasive species
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Rendering designed by RLA
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Before
Drainage ditches
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Before (cont.)
Drainage ditch
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Grading
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Plant installations
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Near Project Completion
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Rain Event
Ponding water
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First Growing Season
Sedimentation
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Before and After
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Before and After
An increased filtration area also helps to slow run-off velocities
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Components of the Bioretention Facility
• Bioretention basin with 6” under drain pipe
• Bioretention media (equal parts sand, peat, triple-shredded hardwood mulch)
• Fore bay
• Dry detention pond
• Emergency Spillway into dry detention pond
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Bioretention Construction
Excavation to subgrade
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Geotextile fabric
Under drain pipe
Approximately 6” of clean stone
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Geotextile placed over stone layer
Bioretention soil media
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Place soil media using low-pressure track equipment
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Storm water pipes leading to the fore bay
Storm water discharge into bioretention fore bay
Fore bay construction
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Beginning plant installation
Fore bay discharge pipes
Mulching over soil media
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Fore bay to bioretention basin
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Near Project Completion
Conversion from an open field…
To a bioretention facility, improving water quality
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Dry detention pond
Bioretention basin
Fore bay
June 26, 2006
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Results
• The wash stalls and manure bin covers have generally met the intent of the CAFO regulation.
• Conclusive qualitative results for the rain gardens and bioretention facility are not yet available.
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On behalf of Delaware Park
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Special Thanks
• Environmental Protection Agency– Dave McGuigan, Chief of Water Compliance– Hank Zygmunt, Agricultural Specialist– Ashley Toy, Enforcement
• Department of Natural Resources and Environmental Control– Peder Hansen, Chief of Water Discharges– Cheryl Gmuer, Inspector
• Delaware Department of Agriculture– Bill Rohrer, Nutrient Management Administrator
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Questions?