110 Main Street
 Prince Frederick, MD 20678

410-535-3101
301-855-1599
410-535-3103 (fax)


Surveyors ~ Engineers ~ Land Planners


    Collinson, Oliff & Associates, Inc. (C.O.A.) has been providing Professional Civil Engineering, Professional Land Surveying and Land Planning services in Calvert,
Charles and St. Mary's Counties since 1990, and are now servicing Anne Arundel County.





Power Plants
 Commercial Subdivisions
 Schools
 Residential Subdivisions