High level sewer construction in sand at Forest Hills, Jamaica Plain.  Note bin suspended from overhead crane with trolley used to remove excavated dirt from tunnel. Due to the sandy nature of the soil in this area, wooden beams resting on a foundation provide support for the roadway above. From Metropolitan Water and Sewage Board First Annual Report.  January 1, 1902.  This is a close-up view of the original photograph, a full frame view may be seen here.