The Quincy, Ill., Plant.
ASILY one of the best water works systems in Illinois, is that at Quincy, of which L. & W. H. Bull are the owners, and D. R. Gwinn, superintendent. The plant consists of thirty miles of mains, 6-20 inches; a reservoir of 20,000,000 gallons capacity, 222 feet above low water of the Mississippi river, which is the source of supply. The water is received through a 30-inch yellow pine conduit, 1,500 feet long, and running to a point in the river above all possible local contamination. The inlet pipe is constructed of yellow pine kiln dried staves, 16 feet long and 4 inches thick before dressing and were dressed on the inside to2 7-8 inches and bevelled to an inside circle of 30 inches. In the centre of the edge side of each stave was cut a groove ‘A inch wide and deep enough to receive a tongue of thoroughly seasoned pine, scant 1/2 inch thick and one inch wide. I hese tongues were placed in the grooves as the conduit was constructed, and entirely fdlcd the grooves after the pipe was in the water. The staves broke joint every four feet, and being sixteen feet long, all the joints formed at that even distance.
The end of each stave was cut to receive a piece of iron 5 inches by 7 inches by 3-16 inches, which entered the end of each stave 3‘A inches. On the outside of each butt joint was nailed a plate 3-16 by 6 by 8 inches ; the wrought nails being clinched on the inside of conduit. All plates were thoroughly painted as put in place ; ,’4-inch iron hoops, to feet long, encircle the pipe and these plates every few feet, and are put in with a clamp, the ends being bent back with the ham, mer over a solid H-I rich iron link. A side rod of }Qinch round iron runs continuously on each side of the pipe, being well secured with galvanized wire to every hoop.
The first section of completed pipe was 540 feet long, and Was successfully launched into Quincy Bay on iron railroad bars from the ways on which it was put together, as shown in ilustration. The second section was of the same length, and the third, 400 feet. The three sections were towed down to the Mississippi river, and the third section, secured to the first by a half sleeve of boiler iron, four feet long, flanged and bolted with four 7-8-inch bolts ; also by a 7-8-inch iron rod, fastened to lugs on each section, and also by a draw rod connecting the side rods on the conduit. These two sections, (>40 feet in all, were laid in one piece. The joint between the middle and last section was made by vising a boiler iron flanged half sleeve, 4 feet long, with four 7-8-inch bolts on each sidewell drawn up, without other fastening, ‘l ive crib is 52 feet long, 16 feet wide and 8 feet high, with a V-shaped ice breaker on upper end. The end of the conduit projects some four feet into a chamber on the upper end of cut; it lies there on a heavy oak floor and there is an oaken deck above—the chamber being some 4 feet high. The crib lies in 13 feet of water at low water mark. The conduit lies in from 12 to 20 feet of water. Eight piles were driven alongside of pipe and crib to resist the transverse thrust ofi the current. Two of the piles are bolted to the conduit by a bent arm of-l^-inch iron, passing over the pipe and bolted up to the pipe, which wrere afterwards sawed off by the diver, about 4 feet from bottom. The other piles were sawed partly in two before driving and broken off by a pile driver afterwards about 3 or 4 feet from bottom of river. The last section of conduit has considerable bag in it, due to cross currents and wind while it was being laid.
The crib was heavily ballasted with rip-rap, and the conduit is held in place at bottom of river by stone ballast fastened to the hoops by galvanized wire.
A 30 inch sluice gate is located at the pump well from which a line of 30-inch iron pipe is run to the water edge where connection is made with the wooden conduit.
In 1893 an examination showed that a sand bar had formed at the crib almost covering the opening into the conduit. An opening was cut in the top of conduit just below the crib and a piece of wooden pipe made of 3-inch yellow pine, 24 inches in diameter, 3 feet 2 inches long, was made and bolted to the conduit.
The conduit between the pipe and the end of conduit was blocked off with brick laid lengthwise with conduit, to keep the sand from coming in at the end.