CAFO Designs at Delaware Park Prepared for DELAWARE

CAFO Designs at Delaware Park Prepared for: DELAWARE ESTUARY SCIENCE CONFERENCE AND ENVIRONMENTAL SUMMIT January 23, 2007

CAFO Designs/Environmental Stewardship at Delaware Park Presented by Duffield Associates, Inc. James M. Eisenhardt

What is Delaware Park? A multi-dimensional establishment featuring horse racing, casino slots, and an 18 -hole championship golf course located in Stanton, DE.

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 Barns and Stables White Clay Creek

Watersheds Red Clay Creek Site White Clay Creek Christina River Taken from NCC e. Parcel. View Map Delaware River

White Clay Creek (Wild and Scenic River)

Comprehensive Approach to Stewardship • Stream Restoration • Reforestation • Native meadows • Green technology

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

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

Equine Activity Total Capacity 1475 March. May 1000 June. Oct 1350 Nov Dec-Feb 750 Less than 100 In 2005, this generated 27, 006, 397 lbs of straw and wood shavings

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

Wash stalls Concrete pads Drains directly to sewer system

Manure bins Carport roofing system

Treating run-off from parking areas • Rain gardens • Bio-retention facility

Components of rain gardens • Green technology BMP “best management practice” • Grading • Plant Material

Grading • Reduces run-off velocity • Heavier material settles out (sedimentation) • Allows plant material more time for water uptake • Helps remove excess nutrients and bacteria

Plant Material • • • Native plant material Plugs vs seeds Acclimates and establishes quickly Limits erosion potential Reduces invasive species

Rendering designed by RLA

Before Drainage ditches

Before (cont. ) Drainage ditch

Grading

Plant installations

Near Project Completion

Rain Event Ponding water

First Growing Season Sedimentation

Before and After

Before and After An increased filtration area also helps to slow run-off velocities

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

Bioretention Construction Excavation to subgrade

Geotextile fabric Under drain pipe Approximately 6” of clean stone

Geotextile placed over stone layer Bioretention soil media

Place soil media using lowpressure track equipment

Fore bay construction Storm water discharge into bioretention fore bay Storm water pipes leading to the fore bay

Beginning plant installation Fore bay discharge pipes Mulching over soil media

Fore bay to bioretention basin

Near Project Completion Conversion from an open field… To a bioretention facility, improving water quality

June 26, 2006 Bioretention basin Fore bay Dry detention pond

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.

On behalf of Delaware Park

Special Thanks • Environmental Protection Agency – Dave Mc. Guigan, 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

Questions?