The end supports of the bridge are timber bulkheads, each having nine 10 inch x 10 inch hard-pine posts, with a 6 inch × 10 inch hard-pine sill, sunk about 9 feet into the ground, and capped with a 12 inch × 12 inch hard-pine stick. HILL-STREET RETAINING-WALL. A contract was made with Donovan & Brock, Boston, dated October 6, 1891, for building a retaining-wall at the easterly end of Hill street, on the line of Sackville street. The wall is of granite, laid solid in cement mortar, and rests on a concrete foundation. The wall is capped with a granite coping, and has on top a close board fence 5 feet high. Total amount paid contractor, $1,485. IRVINGTON-STREET AND YARMOUTH-STREET RETAINING WALLS. These walls are located one on each side of the Providence Division of the Old Colony Railroad, at the ends of Irvington and Yarmouth streets, the streets being in line with each other. A contract was made with R. D. Shanahan, dated June 15, 1891, for building a retaining-wall at the end of Irvington street, and for adding buttresses to the retainingwall at the end of Yarmouth street. The wall is of granite laid solid in cement mortar, and rests upon a pile foundation with concrete cap. Granite buttresses were built at the back of the wall to afford a sufficient foundation for the piers of an iron foot-bridge. At the back of the wall on Yarmouth street, similar buttresses were built of concrete, with granite coping-stones. The total cost of the work, including the repointing of the wall on Yarmouth street, was $3,537. IRVINGTON-STREET FOOT-BRIDGE, OVER PROVIDENCE An iron foot-bridge has been built over the tracks of the Providence Division of the Old Colony Railroad, on the line of Irvington and Yarmouth streets. The bridge is a through bridge of the riveted bowstring type, resting upon wroughtiron piers. The tops of the piers are on a level with the floor of the bridge, and are reached by stairways from the sidewalks of each street. The stairways are of wrought iron with hard-pine treads. The bridge was built by the R. F. Hawkins Iron Works, of Springfield, Mass., under contract dated Sept. 16, 1891, at a total-cost of $1,773. L-STREET ABUTMENT. The contract for building the south abutment of L-street bridge was let to Perkins & White, of Boston, under date of Oct. 28, 1891, for $5,925, and calls for the completion of the work on or before June 15, 1892. At this date the piles have been driven and capped for the foundation, and the larger portion of the ballast and riprap placed. L-STREET BULKHEAD, SOUTH BOSTON. Plans and specifications were made in 1890 for extending L-street bulkhead northerly from the bulkhead built in 1889; the length of bulkhead to be built being 727 feet, enclosing 328 feet of street extension. The contract for building the bulkhead was awarded to F. G. Whitcomb for $7,200; the work was begun April 23 and completed July 27, 1891, at a total cost of $7,210. ROXBURY-CANAL SEA-WALL. Plans and specifications were made for building a sea-wall on Roxbury canal and adjacent dock at the Paving wharf of the Street Department. No work has yet been done on the wall. STONY-BROOK IMPROVEMENT. Roslindale Branches. This improvement contemplates a channel sufficiently large to carry the rainfall from a tributary water-shed of about 1,000 acres, and will, when this improvement is completed, prevent the flooding in this vicinity during heavy rains; but until the channel has been farther extended up-stream about 300 feet, there will still be danger of occasional floods. The work done during the past season embraced both the main branch of Stony brook at Roslindale and also a small brook flowing into it. The larger channel extends from a point on the old brook channel about 160 feet below Poplar street, through private land, and in Poplar and Washington streets, a distance of 665 feet. It is partly open and partly covered. The open portion below Poplar street is 12 feet wide, with side-walls of rubble masonry nowhere less than 6.8 feet high. It is laid on a grade of 1 foot in 100; the covered channel varies in size from 11 feet 6 inches wide. × 6 feet 6 inches high to 9 feet wide x 8 feet 6 inches high. Both side-walls and the arch are of rubble masonry; the よ inclinations are 1 foot in 100 feet and 1 foot in 56 feet; 22 feet of open channel, 9 feet wide, was built at the up-stream end; the bottom is paved throughout with stone or brick, and a concrete foundation extends under both walls and under the paved bottom. The smaller brook channel extends from Birch street through private lands, across Cohasset street, and again through private lands to its junction with the larger channel on the north-west side of Washington street; a total distance of 507 feet This channel is a stone culvert 4 feet 6 inches high and 5 feet wide; it is laid on an inclination of 1 foot in 125 feet; the side-walls are of rubble with granite covering-stones; the paving is of stone; a concrete foundation extends under the side-walls and under the paved bottom. Bids for the construction of the work were received July 20, and the contract was awarded to H. P. Nawn, the lowest bidder. In connection with the brook channels, and during their construction, 340 feet of pipe sewer was built, with the necessary branches, manholes, etc. This sewer was necessary in order to afford drainage to houses on the westerly side of Washington street, which were cut off from the common sewer in that street by the low grade of the new channel; this work was done to much better advantage during the construction of the brook channel than would have been possible after the completion of the work. The sewer is of 10-inch Akron pipe, surrounded by concrete; it is located for a distance of 185 feet immediately outside of the walls of the brook channel, and for the remaining 155 feet, until it enters the common sewer on Washington street, is laid under the new channel, immediately beneath the concrete foundation. BENNINGTON-STREET CUlvert. Plans and estimates were made for a wooden culvert across Bennington street, between Saratoga street and Wadsworth street. |