horner - Maryland Department of the Environment

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21 févr. 2014 (il y a 7 années et 5 mois)

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CAFO Designs at
Delaware Park

Prepared for:

October 24, 2006

NINTH ANNUAL WETLANDS &
WATERSHEDS WORKSHOP


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.




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

White Clay Creek

Barns and Stables

Watersheds

Taken from NCC eParcelView Map

White Clay
Creek

Christina
River

Site

Delaware
River

Red Clay Creek

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

March
-
May

June
-
Oct

Nov

Dec
-
Feb

1475

1000

1350

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 low
-
pressure track equipment

Storm water pipes
leading to the fore bay

Storm water
discharge into
bioretention fore bay

Fore bay construction

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

Dry detention pond

Bioretention basin

Fore bay

June 26, 2006

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 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





Questions?