General Info

Established in 1976, Duffield Associates is a service provider of geoscience technology. Located in Wilmington, Del., it provides a variety of services, such as sustainable design, water and natural resources, geotechnical, environmental, civil engineering, construction review, coastal/ waterfront, structural, solid waste landfill, laboratory service and many more. The firm provides engineering and consulting for government, industrial, construction and professional clients. Some of its projects include Eleutherian Mills Dam & Adjacent Millrace Restoration, Stone Harbor NJ Bird Sanctuary Restoration, B & O Bank Stabilization, Potts Superfund Site, Lewes Canalfront Park and New Castle County NPDES. Cumberland Geoscience Consultants (CGS),a division of Duffield Associates, provides is a full service geotechnical consulting engineering firm providing complete range of Duffield Associates' services including ecological services/permitting, environmental services, water resources and infrastructure and coastal/waterfront engineering.