Novel Engineering Plan.

Novel Engineering Plan.

The pump-house of the Mt. Vernon (Ind.) water-works is on the north bank of the Ohio river, 200 feet distant from low-water line. There are two pumps, each taking water through a 12-inch intake pipe, which extends into the river 150 feet beyond low-water line. At this distance the water is 18 feet deep. The river bottom is gravel. The intakes were made up of 18-feet lengths of kalamein pipe. The kalamein sleeves or hubs being too short to make a joint strong or stiff enough for this work, special sleeves 14 inches long, resembling ordinary cast-iron pipe sleeves, were used, making the joints with hemp and lead in the usual way. On the outer end was a length of pipe with its end plugged and its upper half containing 1100 3/4-inch holes, to serve as a strainer. A wrought-iron collar was shrunk around the end of this strainer, from which projected two diverging legs, which, resting on the bottom, held the strainer two feet above the bottom. In laying this intake the following method was pursued: Empty oil-barrels were hired for the work at ten cents each. Threeeighths inch rope was tied around each barrel one-fourth of the length of the barrel from each end. Two barrels were tied together side by side and 12 inches apart. Two pairs of barrels were placed in the water as near the shore as possible, and the strainer length of pipe laid between the barrels of each pair, so that one pair of floating barrels supported each end of the pipe. A second length of pipe was leaded into the end of the strainer, and a pair of barrels placed under its shore end, and the whole pushed out into the river until one end of the second pipe came as near to the water line as the barrels would float. A third pipe was leaded to the second and a pair of barrels placed under it, and the three pipes pushed out into the river. The work was continued in this way, doing all the work at the water’s edge until the strainer length first put on was 150 feet from shore.

To guide the pipe as it was pushed out from shore, and to prevent its being carried down stream by the rapid current, two anchor-rods of one-inch square iron were driven 100 feet up stream from where the intake was to lay, and at different distances from shore. One end of a No. 10 wire was fastened into the top of each rod before driving and the other end was tied to the pipe. Enough barrels were placed under the pipe to float it at the surface of the water. When it was over the position it was to occupy on the river bottom, the ropes on alternate pairs of barrels were cut by a chisel attached to the end of a 20-feet pole, and as the barrels were released the pipe sunk quietly to its position on the river bottom. An iron rod was then driven five feet into the gravel on the downstream side of each length of pipe. The top of the rod was bent in a semi-circular form which, hooked over the pipe, prevented its rising or being carried down-stream.

The two intake pipes were laid parallel to each other and six feet apart, and were completed by six men working fifteen hours.

The extending of these pipes from low-water line to the pumps, being in dry ground, was easily accomplished.

Commissioner Robbins of New York on Friday escorted James Gordon Bennett, the Earl of Fife and some of their friends around the Headquarters building and showed the visitors the operations of the fire telegraph, and also gave them an exhibition in quick hitching by Hook and Ladder No. 16 and Engine No. 2q. The visitors were much pleased with all they had seen, and cordially tnanked Mr. Robbins for his courtesies.

No posts to display