The Proposed New Water Supply for Youngstown, O.
The water-works commissioners of Youngstown, O., directed Civil Engineer G. D. Hersey, and their Superintendent Hamilton to make surveys and plans, together with estimates, for the cost of construction for acquiring a new source of water supply under date of June 21. They report, in substance, that water may be diverted from Mill creek into a brick conduit terminating at a storage reservoir, wherein the water is suffered to subside ; thence, becoming clear, is suffered to flow through a steel conduit to a clear water basin located on the north side of the river, opposite the mouth of Mill creek. The water is thence by gravity passed to the present pump well. The reservoirs are separated from the creek, and its waters cannot enter them except through the intake gates. A dam is thrown across the main stream, thus raising the water the required height in order to insure a flow through the gate and at will, in view of the variable conditions of the water during freshet and low water stages. The conduit will be of brick, four feet diameter, a half mile in length. The storage reservoir will occupy the entire valley of Mill creek, and will contain when full to flow line about 170,000,000 gallons of water. The bed of Mill creek will be diverted and carried along east side of reservoir and allowed to fall into the old channel below the dam to be built. The clear water basin is designed to hold 50,000,000 gallons of water, designed to have a depth of nineteen feet. A twenty-four inch pipe will be laid from the basin to pump wells, with by pass connection to steel conduit in the event of shutting out clear water basin for repairs or other requirements. The Mill creek watershed is about seventy square miles, and a conservative figure of daily yield is 700,000 gallons per square mile.
The present plan contemplates a storage of 220,000,000 gallons. With the present pumping this gives about loo days’ supply ; with a daily pumpage of 3,000,000 gallons, seventythree days’ supply, and with 5,000,000 gallons daily pumpage, forty-four days’ supply. The amount of storage can be increased 30,000,000 gallons with safety by raising the flow line three feet.
The plan of distribution contemplates dividing the city into two lines of service, the low line being the present distribution, and the new service providing for the high service. Two stand-pipes will be the source of high service, each to be thirty feet diameter and seventy-five feet in height, each one to be supplied through twelve-inch force main separate and yet capable of being united. A 3,000.000 Worthington pump now on hand, and to attend to suit new conditions. Both high and low service will be connected and controlled by gate valves at the pump station, in order that high pressure service may be used on low pressure service in the event of fire.
The estimated cost of the work as herein described, exclusive of land, is $283,000, which also includes reinforcement of pumping plant to the extent of a new 10,000,000 gallon pumping engine.