Geologic and seismic studies were made at this site in October 1961 primarily for obtaining data that would aid in estimating the quantities of materials to be excavated from the cut required for the construction of Route 3. A report in the geology of the site together with the interpretation of the seismic data that were obtained at this time was submitted by Robert O. Castle and Robert M. Haslewood (file report of October 1951). Additional seismic work was performed at this site in July 1953. This later work was done to obtain information that would help in planning for the construction of the inner and outer loops of the northwest ramp, and the western approach of Route 62 to Route 3. This report contains the geologic interpretation of the supplementary seismic data that were obtained during the July 1953 survey. The work was performed as a part of a cooperative project of the Massachusetts Department of Public Works and the United States Geological Survey.
Mr. M. E. Chandler and Mr. W. L. Carney, Department of Public Works' Engineers, performed all pertinent survey work required for this project, and prepared the essential plans and profiles. Mr. Chandler also operated the seismic equipment and assisted in the preparation of the seismic velocity data.
