NEW WATERWORKS SYSTEM AT TORONTO.

NEW WATERWORKS SYSTEM AT TORONTO.

FATAL ACCIDENT IN TUNNEL SHAFT.

C. L. Fallows, Deputy City Engineer, Toronto, Ont.

At Toronto, Ont., extensive works are going on in connection with the new waterworks system for that city. The most difficult piece of construction is the tunnel, the scheme of which consists of a new 6-ft. steel conduit from the intake in lake Ontario to the tunnel-shaft near Muggs’ landing, and a tunnel in the rock from that point to the main pumping station. The 6-ft. conduit has been completed for some time. Its capacity is from 40.000.000 to 45,000,000 gals, per day. The tunnel is under construction; its capacity will be 80,000,000 gals per day. The tunnel runs to the main pumping station at the foot of John street and Toronto Island at a point about 400 ft. north of Muggs’ landing. At some future period, if necessary, another 6-ft. steel conduit will be added, and the tunnel will then deliver its full 80,000,000 gals, daily. At the point nearest Muggs’ landing a steel shaft has been sunk down through sand and rock to a depth of 95 ft. from the surface of the water. This shaft will be 10 ft in diameter, when lined. The depth of 95 ft. takes the shaft into about 35 ft. of rock. At the bottom of the steel shaft the tunnel proper starts in a northerly direction towards the pumping station. It is there carried entirely through shale rock, being tubular, instead of horseshoe-shaped, as originally intended, and is lined with concrete and brick, with a diameter of 8 ft. 4 ins. About 20 to 30 ft. south of the pumping station the north shaft connects with the tunnel. It goes down 75 ft. below the water level, mostly through rock and at the out side 10 or 12 ft. of sand, the rock dipping down south, it being 10 or 12 ft. below water at the pumping station, and at the south or Island shaft 64Vi ft below. The north shaft, when completed. will also be 10 ft. in diameter, and will have the necessary screen-chambers and valves for controling the water supply. From the south shaft of the tunnel to the lake a 6-ft. steel pipe conveys the lake water to the tunnel shaft. This pipe can be entirely separated from the existing 5-ft., 4 ft. and 3-ft. pipes extending from the shore crib to the pumping station. A new 6-ft. pipe starts from the south tunnel shaft and runs across the Island to the shore crib and out into the lake into a depth of 75 ft. of water. There is at present an upper pipe-line with a 5-ft. steel pipe, which is laid at such a high elevation as to limit the city’s supply of water. From the new pipe it is distant $0 ft. or 60 ft. From shaft 1 to shaft 2 the boring has been through solid shale rock, and to allow of the particular kind of liorer being used the shape of the tunnel was changed. The contract price of the tunnel is $269,000. It was at the foot of the tunnel shaft near Muggs’ landing that the fearful accident of a few days ago took place. The last blast for the evening had been fired and seven men were being taken up the shaft in the cage and wire near the top when the ⅝-in. cable snapped at the winch-drum, and, whirling over the pulley at the nose of the derrick-boom, allowed the bucket, with the men in it, to drop 90 ft. sheer down to the foot of the shaft. After them came the 500-lb. iron weight used to unreel the cable when the bucket is lowered empty into the shaft. This weight crashed down upon the huddled forms on the floor of the cage at the foot of the shaft, crushing the heads of two and the arms and legs of others. They were found lying huddled together with the 500-lb. weight lying on them. 1’wo had been killed instantly; two more died soon after and three were desperately injured.

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