Associates has been a leader in sustainable site design, Low Impact
Development (LID), innovative stormwater management, and green infrastructure
for over 30 years. With 17 LEED Accredited employees, Duffield Associates
recognizes the relationship between the built and natural environments,
and we continuously seek innovative design solutions that will protect,
restore, and enhance both.
Our areas of expertise include the following:
Low Impact Development Site Design - smart-growth site analysis
that considers floodplains, wetlands, endangered species, and
riparian buffers to plan a project sensitive to the existing
environment. Engineering designs promote open space and protect,
restore, and enhance natural environments.
Brownfield Redevelopment - environmental analysis, site characterization,
remedial design and implementation, and assistance with environmental
indemnification and grant funding to redevelop brownfield sites.
Sustainable Stormwater Management - stormwater management for
runoff volume and water quality. Best Management Practices (BMPs)
- Water Efficient Landscaping Design - native species plant selection
for minimal water usage. Designs may incorporate stormwater
and gray water systems to provide irrigation.
- Innovative Wastewater Technologies - drip/spray system and
Rapid Infiltration Basin (RIB) modeling, design, construction
- On-site Renewable Energy - environmental analysis and engineering
support for the design of geothermal heating and cooling systems.
- Materials Reuse and Recycled Content - engineering design to
maximize the use of recycled materials (e.g. fly ash, recycled
concrete) and promote recycling rather than disposal.
- Construction Waste Management - engineering support to plan,
review, manage, and assist with separation and recycling of
In addition to the services listed above, Duffield Associates can
assist in identifying sustainable design and green building funding
sources and can assist with development of grant applications. Our
engineering and construction review services can provide assessments
and documentation to demonstrate green building practices in the
design and construction phases of the project, respectively. Many
of these design and documentation services are applicable to various
green building programs such as the United States Green Building
Council (USGBC) LEED Rating System.
Duffield Associates' LEED Certification Expertise
Company Sustainable Efforts