The identification of historic resources is essential to preservation. Surveys document at a variety of levels the historic human-made environment of our communities. Since the creation of the Maine Historic Resources Inventory in the early 1970s MHPC staff, consultants, federal and state agencies, municipalities and volunteers have surveyed and recorded over 60,000 above ground resources and identified over 10,000 archaeological sites. This in turn enables us to identify those properties which merit nomination to the National Register of Historic Places and to thereby extend protection to those resources.