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Cowan Associates is one of Pennsylvania's oldest full service civil engineering firms serving clients in Connecticut, Delaware, Maine, Maryland, Massachusetts, New Jersey, New York, North Carolina, Pennsylvania, South Carolina, and Virginia. We specialize in Civil and Environmental Engineering, and also provide Land Development Engineering, Building Engineering, Municipal Engineering, Construction Quality Control, Exploration, Testing and Inspection, Accident and Failure Investigation, Structural Analysis, Geotechnical Evaluations, Environmental Audits, and Surveying.