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<br />2895 <br /> <br />The Brushy Basin Member ranges in thickness from 150 to <br /> <br /> <br />. 300 feet in the Ute Mountain area. Craig and others (1955, <br /> <br /> <br />p. 156) indicate that as much as 450 feet of Brushy Basin <br /> <br /> <br />has been measured in southwestern Colorado, where the member <br /> <br /> <br />differs considerably in thickness. The member is 156 feet <br /> <br /> <br />thick just south of the project area in the Carrizo Mountains <br /> <br /> <br />(Harshbarger, Repenning, and Irwin, 1957, p. 55). <br /> <br /> <br />Water supply.--Only a few wells have been drilled that <br /> <br /> <br />have tested the Morrison Formation, and little data are <br /> <br /> <br />available regarding potential water supplies from the forma- <br /> <br /> <br />tion. n,e Westwater Canyon Sandstone Member and the Salt <br /> <br />Wash Sandstone Member of the Morrison may yield small <br />quantiti.es of \vater to wells. However, the members are not <br /> <br /> <br />aquifers of major importance because of their lenticularity, <br /> <br /> <br />. poor sorting, and differing thickness. A well drilled at <br /> <br /> <br />Towaoc i.n 1954, (well B-16, fig. 2), ending ~n the basal <br /> <br /> <br />sandstone units of the Morrison (considered to be the Salt <br /> <br />Wash Member), yielded 9 gpm on bail testing, but was <br /> <br /> <br />abandoned in 1956 because its yield had declined to less <br /> <br /> <br />than 1 gpm. Recent test wells tapping the unit in the <br /> <br /> <br />Towaoc area also yield small quantities of water. <br /> <br /> <br />As the Junction Creek Sandstone is a better source <br /> <br />for water than the Salt Wash Sandstone Member, any water <br /> <br /> <br />well drilled into the Morrison should be deepened to test <br /> <br /> <br />the underlying Junction Creek. <br /> <br />. <br /> <br />6,;j <br />