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- ~r' ,:.'"i J ,--t ....-l .t:~ PROJECT FEATURES We lls and Pump s The depth to ground water throughout the ptoject area ranges from about 0.5 to 15 feet. The potential for salvaging water is greatest in Stages 3, 4, and 5 whel"e cleaner sands make water easier to collee t than from the sil ty sands of Stage 1-2. The pump designs for each stage reflect the particular conditions of the well sites. Design engineers must consider factors such as the rate water will be pumped and the horsepower needed to lift the water to the desired level. The drilled wells are equipped with a submersible, electrically-driven pump. The well and pump are housed in a concrete vault. set into the ground. The vault extends about one foot above the ground surface. It has access hatches for maintenance of the pump, its electrical system, and discharge pipe. The pumps are tested at the pump manufacturing plant and again at the actual well sites after installation. Careful records are made of their performance. Well Field Laterals Bur'ied pipelines, called well field laterals, connect a series of wells together and collect the pumped water. Smaller laterals lead to larger ones which deliver the combined pumped waters to the conveyance channel. The total com- bined length of the well field laterals is about 100 miles. Service and access roads, which are considered accessory construction features, are constructed for maintenance. The pipelines range in diameter from 4 inches to 36 inches. The laterals are buried about 4 to 5 feet underground. The drawing on the following page shows what a typical lateral system looks like. Conveyance Channel The conveyance channel is a specially constructed canal which extends from Highway 17 north of Hooper, Colorado, southward to the Rio Grande. The channel will collect water from the well field laterals and deliver it to the river. The entire channel is about 42 miles long. The dimensions of the channel vary from a width of 8 to 22 feet on the bottom, and from about 4.7 to 5.7 feet in depth. The channel is lined with a 20 mil thick polyvinylchloride -- PVC -- material to prevent loss of water through leakage. The PVC is covered with an average of 10 inches of earth cover and then 6 inches of sand and gravel to protect the lining. When completed, the channel will be the longest PVC lined canal of its kind in the United States. .>,l -9- ~