cated about 20 feet to its water line below the street surface. The excavation is expected to be largely in sand, gravel and clay, with considerable water. The contract was made November 27, 1907. On account of the severe weather of the winter, the Board permitted the contractor to delay starting on this work until March 1, 1908. A second contract, extending from Kendall Street, through Cypress Street, to Boylston Street, a distance of 1,275 feet, was made with the Hugh Nawn Contracting Company on November 25, 1907. Of this length, 940 feet will be in tunnel, in earth and Roxbury puddingstone, and 335 feet in open trench. Work in the open cut section was started December 2, 1907, on the south side of Boylston Street. At the date of this report 130 feet of trench have been excavated to grade. The excavation at this location has a depth of about 25 feet, -20 feet in sand, gravel and clay. The bottom 5 feet is in Roxbury pudding-stone. The excavation has been handled by bucket excavators. Considerable water has been found in excavation. A shaft about 12 feet square for tunnel heading was started December 5, 1907, at the corner of Kendall and Cypress streets. At the date of this report the shaft has been completed to a depth of about 35 feet, and a tunnel heading started in a northerly direction. The sewer along the whole length of this section is to be of horseshoe cross-section, 7 feet high and 6 feet 6 inches wide. The masonry walls of the sewer are to be of Portland concrete, from 12 inches to 15 inches in thickness. At the date of this report no masonry has been placed in the section. Section 82, Brookline. Division Engineer in Charge. FRANK I. CAPEN. Contractors. -T. J. O'CONNELL, Contract No. 57 (Sta. 0+30 to 13+50). T. J. O'CONNELL, Contract No. 55 (Sta. 30+50 to 48 +50). JAMES DRISCOLL & SON, Contract No. 56 (Sta. 13+50 to 30 +50). This section extends from Boylston Street, along Cypress Street, Brington Road, private lands, Brookline Playground, Davis and Gorham avenues, Greenough, Washington and Park streets, to Beacon Street, a distance of 4,830 feet. Three contracts have been made for this construction; one extending from Boylston Street to Davis Avenue, with T. J. O'Connell, dated July 9, 1907, for a length of 1,320 feet. Work on this con tract was begun July 18, at Davis Avenue. The excavation had an average depth of 18 feet, in sand, gravel and clay. In the Brookline Playground, for a length of about 200 feet, very fine sand was encountered. Not a large amount of water was found in the excavation. It was handled by a 4-inch centrifugal pump, electrically operated at a well on Davis Avenue. This pump controlled the ground waters to the crossing of the Boston & Albany Railroad. The excavation was handled by bucket excavators from Davis Avenue to the railroad. The excavation under the railroad and Village Brook was made without the aid of machinery. Through private lands and Brington Road the excavation was handled by bucket excavators, to near Cypress Street. In Cypress Street and for a short length in Brington Road, Roxbury pudding-stone was found for a depth of about 6 feet at the bottom of the trench. This rock excavation was found for a length of about 150 feet, and over this length of trench the excavation was handled by a framed derrick on platform. No large amount of water was found in the excavation between Boylston Street and the railroad. It was handled from a well on private lands near Brington Road by a 4-inch centrifugal pump, electrically operated. The excavation on this length of the section was completed about the middle of December. The sewer for this length is 6 feet 6 inches wide and 7 feet high, of horseshoe cross-section. It is built of Portland concrete, with walls about 12 inches in thickness. Passing under the branch of the Boston & Albany Railroad the masonry was increased to about 16 inches in thickness and reinforced with twisted steel. Passing under Village Brook the section was widened to 8 feet and the arch depressed so that the sewer had a height of 5 feet and 6 inches. The walls of the sewer were increased to 16 inches in thickness and the section reinforced with twisted steel. For a length of about 100 feet, in Brington Road, the local 8-inch sewer was relaid on the side of the Metropolitan Sewer. The masonry was completed on this contract and trenches backfilled late in December. On account of the severe winter conditions, repairs to surfaces of streets and in private lands will be made in the spring. A second contract, for construction of part of this section, was made with James Driscoll & Son, on May 21, 1907, for a length of 1,700 feet, in Gorham Avenue, Greenough and Washington streets, Work on this contract was from Davis Avenue to Park Street. begun June 4, 1907, at Davis Avenue. The excavation had an average depth of 22 feet, with a maximum of 26 feet in Greenough Street. For a length of about 400 feet in Greenough Street the excavation was in hard, compact gravel and clay. On the remainder of the contract the excavation was in clean sand and gravel of such character that it was used in the masonry of the sewer. But very little water was found anywhere in the section; such as was found was handled in a well at Davis Avenue, and lifted by a 4-inch centrifugal pump, electrically operated, the same as used by T. J. O'Connell, before noted. The excavation throughout practically the whole contract was carried out by bucket excavators. The excava tion was completed about December 1. For a length of 30 feet near the corner of Greenough Street and Gorham Avenue, passing an elm tree of great size, the excavation was in tunnel. The sewer for the 1,700 feet of this contract is of horseshoe crosssection, 6 feet 6 inches wide and 7 feet high. The invert is built entirely of Portland concrete, with walls about 12 inches in thickness. The arch is of Portland brickwork, 8 inches thick, reinforced with concrete spandrels for about three-fourths its height. Passing under a brick sewer of the town of Brookline, at the corner of Washington and Park streets, the masonry section of the sewer was increased to 8 feet in width and the arch depressed to 5 feet and 6 inches in height. The walls of the concrete invert in the modified section were about 16 inches in thickness and the brick arch 12 inches. This section was further reinforced with twisted steel rods. Work on this contract was completed at the date of this report, except for repairs to street surfaces and sidewalks, which, owing to frozen winter conditions, will be delayed until spring. A third contract for construction on this section was made with T. J. O'Connell on May 29, 1907, for a length of about 1,800 feet in Park Street, from Washington Street to Beacon Street. Work on this contract was begun June 8. The excavation was in dry sand and gravel, with an average depth of 24 feet and a maximum depth of 28 feet near Beacon Street. The excavated material was of such character that it was used in the masonry of the sewer. The excavation was handled for practically the whole contract by bucket excavators of the cableway type. The excavation was practically dry. |