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<br />(\!"J",~9~ <br />, "r (, ~.J ,-, ,) <br />" - <br /> <br />Industrial supply on the order of 20 cfs <br />subject to administration by the State <br />drought. <br /> <br />3 <br />CO.56 m Is) and would be <br />Engineer during time of <br /> <br />2.6.2 Construction Methods, Features and Schedules <br /> <br />2.6.2.1 Excavat Ion of the coIl ector-p I pe trench for the wet well <br />Installation would require temporary disturbance of the stream channel <br />during diversion and excavation. Filter material would be placed In <br />the trench above and below the collector, Orientation of the trench <br />could be either perpendicular to the river or diagonal, depending on <br />site conditions and preferred stream-handling methods during <br />construction. A typical infiltration gallery is presented In Figure 2 <br />- 7. <br /> <br />2.6.2.2 The pump house and wet well would be located adjacent to the <br />river, with the pump house elevated above the flood level and with <br />sufficient seals to prevent contamination by surface water. <br />Sufficient water-level controls and telemetry would be provided to <br />prevent dewatering the well during peak-use periods or as a result of <br />a sudden decline In collector yield. <br /> <br />2.6.2,3 The trench and filter containing both collector pipes <br />represents a single construction item. It cannot be easily modified <br />for a two-stage development schedule. The dual pump installation can <br />easily be scheduled to coincide with Rangely's expanding water needs. <br />The initial construction might include the collector pipes, wet well, <br />oversize del Ivery 1 ine to the filtration plant, and a single <br />vertical-turbine pump. As Rangely's demand for water grows toward the <br />10,000-person 155 gpd/person C587 L/day) projection, the additional <br />pump and piping could be installed. <br /> <br />29 <br /> <br />J" <br />