Buildings 586 Dorchester Ave. corner of Preble St., So. Boston Building 578 Dorchester Ave. 12-18 Boston St., So. Boston 26-28 Boston St., So. Boston 34-38 Boston St., So. Boston 34-38 Boston St., corner of Ralston St., So. Boston Sec.G driving sheet piling with steam hammer Sec.F Dorchester Ave. looking northerly from W. 4th St. Temp. sidewalk in front of 551 Dorchester Ave. 3 Flatters being altered Dexter Place sectioon section J Cypher St. yard ruins of the Pattern Shop and Cement Shed Cypher St. yard ruins of the Pattern Shop and Cement Shed Cypher St. yard ruins of the Pattern Shop Sec.J excavation and concrete invert looking northerly Sec.G, Dorchester Ave. concreting the Arch Cross section Fort Point Channel South Station under north side section looking easterly South Station under Billboards east side Dorchester Ave. south of W. 5th St. looking Southerly Space between billboard and Boiler House Dorchester Ave. Space between bill board and Boiler House, corner W.5th St. looking Westerly #539 Dorchester Ave. - looking N.W., So. Boston #539 Dorchester Ave. - looking westerly South Station under fare boxes South Station under lobby toward escalator South Station under stairway covering Sec.F dumping platforms near corner of Macallen St. and Dorchester Ave. Dorchester Ave. condition of opp. compressed steel shafting #411-409 Dorchester Ave., So. Boston Dorchester Ave. condition of opp.447, So. Boston Dorchester Ave. at 453+449, So. Boston Dorchester Ave. condition of 473-485 Dorchester Ave. condition of field opp. Woodward St. Dorchester Ave. vacant lot just north of #525 looking westerly towards the So. End Dorchester Ave., So. Boston at #525 west side 527-533 Dorchester Ave. So. Boston Andrew Sq. Station Birds-eye view Sec.J excavating west of Andrew Sq. Statioon Sec.H the incline looking northerly Testing apparatus Apparatus for Pressure Tests of Waterproofing Membranes Apparatus for pressure tests 1" grout pipe sealed with 3-ply membrane, cloth and asphalt, befort testing Membrane waterproofing tests Membrane waterproofing tests Membrane waterproofing tests Membrane waterproofing tests, So. Boston Yard Membrane waterproofing tests Membrane waterproofing tests Tree 55