Public works . e crusher is served by a stiff-leg derrickwith 45-foot boom. It is driven by a 60-horse •Part I. Explofoundation excavz „f plf, power electric motor and is served with two 24-inchbelt conveyors, 190-feet and 210-feet in length. The cableway has two 150-foot wooden towerssuporting the 1,900-foot cableway span that isequipped with a 2i4-inch cable, 2,600 feet long, ^-inch cable 2,800 feet long, 92 carrier blocks and2,500 feet of ^-inch chain and one spreader barwith hooks, and one signal tower. It is operated byone electric motor. In addition to the cable-way, the dam is
Public works . e crusher is served by a stiff-leg derrickwith 45-foot boom. It is driven by a 60-horse •Part I. Explofoundation excavz „f plf, power electric motor and is served with two 24-inchbelt conveyors, 190-feet and 210-feet in length. The cableway has two 150-foot wooden towerssuporting the 1,900-foot cableway span that isequipped with a 2i4-inch cable, 2,600 feet long, ^-inch cable 2,800 feet long, 92 carrier blocks and2,500 feet of ^-inch chain and one spreader barwith hooks, and one signal tower. It is operated byone electric motor. In addition to the cable-way, the dam is equipped with four steel guy der-ricks having 150-foot masts and booms, two travel-ing derricks with 37-foot masts and 75-foot booms,and one traveling derrick on the spillway with a40-foot mast and a 75-foot boom. The derricksare operated by four Lambert electric en-gines, and two Lidgerwood 2-drum engines. Thefoundation was kept dry by means of one 6-inchWarner steam duplex pump, one 6-inch and one. SAND SCREENING . WASHING PLANT. 295 296 PUBLIC WORKS Vol. 52, No. 17 3-inch Worthington steam duplex pump, and one6-inch centritugal electrical pump. STONE QUARRIES The Riverside quarry produces a good quality ofsandstone traversed by vertical and horizontal seamsthat enable it to be taken out in blocks 5 or 6 feetthick with very little blasting, the required sizesbeing obtained by drilling and plug-and-featherwork. The quarry is equipped with one stiff-legderrick and two grey derricks, operated both bysteam and air, and there is installed there an air-driven planer to dress the faces of the edge 1,500 yards of stone were quarried duringthe season and most of it was delivered to the damby trucks or teams which will be superseded by carsoperated on a narrow-gage railroad that has beenconstructed from the quarry to the dam. A large amount of stone is quarried on StevensMountain, where the soil was stripped from theledge rock by an hydraulic monitor operate
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectmunicip, bookyear1896
