Collinson, Oliff & Associates Inc. specializes in providing professional civil engineering, professional land surveying and land planning services. Based in Prince Frederick, Md., the company has been operational since 1990. It offers a range of services, such as boundary surveys, construction stakeouts, flood elevation certificates, location surveys, residential building permit packages, residential subdivisions, topographic surveys and many more. Collinson, Oliff & Associates Inc. caters to the needs of customers throughout Calvert, Charles and St. Mary's Counties. Some of the projects completed by the firm include Calvert Cliffs Nuclear Power Plant, Huntingtown High School, Market Square Commercial Subdivision and Whispering Woods Subdivision.