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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />0602 <br />until the beginning of Phase IV, the secondary expansion of <br />shale oil production, will require additional quantities of <br />water. For instance, a 500 ton per day ammonium nitrate <br />plant will require 6,000,000 gallons of water per day. It <br />is impossible to determine water usage by the many small <br />supporting plants, but it is certain that requirements will <br />be significant. <br />A large usage of water attributable to a shale industry <br />will be in the homes and cities of the workers and supporting <br />personnel. The per capita usage of water in western communi- <br />ties is higher than in areas where lawn irrigation is not <br />practiced. The larger western Colorado towns use up to 480 <br />gallons per day per person. The factor for Grand Junction <br />is now 297. A recent survey of large western cities by <br />Langbein showed most used greater than 300 gallons per day <br />per capita, A water-use factor of 300 gallons per person <br />per day is assumed in this report. On the average about <br />2/3 of this water should return to the stream. <br /> <br />\'later Requirement for Phase I <br />The usage of water for shale during the experimental <br />phase before any commercial production begins has been <br />variable, but insignificant, There is no reason to believe <br />that fut'ue experimental work, if any, will require water <br />supplies additional to those already developed. However, <br />since prototype production is expected to start between 1960 <br />and 1965, a water supply capability of at least 2500 acre- <br />feet per year, if not already in existence, is suggested <br />starting in 1960. <br /> <br />- 29- <br />