Portland Waterfront Historic District Boundary Increase, c. 1790 - 1936, Portland.
The Portland Waterfront Historic District was listed in the National Register of Historic Places on May 2, 1974 for its significance at the local level in the areas of architecture, commerce, transportation and community planning and development. On December 23, 1984 additional properties were added to the district and the boundary expanded at both the east and west ends of the district. The purpose of the current nomination was to again increase the boundaries to include two more buildings and a granite bulkhead on the south side of Commercial Street.