Dunkelberger Engineering & Testing, Inc

Established in 1982, Driggers Engineering Services is a locally owned and managed service organization that offers services in the areas of geotechnical engineering, construction inspection and material testing. The company offers subsurface investigation services that include land and marine standard penetration test borings, flat-plate dilatometer testing and piezometers installation. It also provides foundation investigation, analysis and recommendation, feasibility studies and retaining wall investigation services. Driggers Engineering Services also offers borrow soils investigation and settlement and sinkhole study services. The company additionally provides concrete inspection, sampling and design, as well as earthwork inspection and compaction testing services. It also offers limerock bearing ratio testing and mine quality control and threshold and structural inspection services. Driggers Engineering Services is located in Clearwater, Fla.

Ardaman & Associates is a professional geotechnical, environmental, water resources and construction materials engineering consulting company with more than 500 staff members. Headquartered in Orlando, Fla., the company has over 15 branch offices in Florida and Louisiana. Its staff features professional engineers, scientists, technicians, drilling personnel and technical assistants. Founded in 1959, Ardaman & Associates serves local, state and federal governments and agencies, public and private utilities, manufacturers, architects, banks and commercial companies. Its services include subsurface investigations, foundation engineering, laboratory testing, preacquisition site assessments, contamination remediation and sinkhole evaluations. Ardaman & Associates also specializes in the civil engineering and environmental aspects of construction monitoring and management of phosphogypsum disposal facilities. It additionally publishes technical papers on subjects related to solid and hazardous waste disposal and management, and maintains a presence in Bartow, Fla.

Madrid Engineering Group is a consultancy that provides geotechnical engineering and environmental services. It also specializes in sinkhole evaluation services and has expertise in completing subsurface investigations. The company has trained personnel in the areas of geology and soil sciences. Madrid Engineering Group uses drills and sampling equipment to extract soil samples from the ground. It has developed the PhosphoCrete method to chemically stabilize soft soils on areas previously mined for phosphate. The company also uses the PhosPhilter solution for surface water clean up. In addition, Madrid Engineering Group offers dam design, embankment, environmental and sediment analysis services. It also provides advanced materials. Madrid Engineering Group is located in Bartow, Fla.