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<br />2347 <br /> <br />In October 1951 a brlef reconnaissance was made of <br /> <br /> <br />. the Towaoc area by S. E. Galloway of tllC Ground Water <br /> <br /> <br />Branch of tIle U. S. Geological Survey. A more detailed <br /> <br /> <br />investigation was st.3.rted in DecC'mbcr 1953 by Joseph T. <br /> <br /> <br />Callahan and completed by will iam J. Powell in 1954, both <br /> <br /> <br />members of the Ground Water Branch of the U.S. Geological <br /> <br /> <br />Survey. These investigations were In cooperation with the <br /> <br /> <br />Bureau of Tndian Affairs. During the 1953-54 investigation, <br /> <br /> <br />6 test. holes were drilled in the Towaoc area--5 shallow <br /> <br />. <br /> <br />. <br /> <br />tests in alluvial material and 1 deep test in sedimentary <br /> <br /> <br />rocks. Drillins of the deep test hole \,2S stopped at a <br /> <br /> <br />depth of 960 feet for economic reasons, and the well did <br /> <br /> <br />not reach its proposed deptl'. Appro:dmately 25 gpm (gallons <br /> <br /> <br />per minute) of '..;ater were 3dded to the community supply from <br /> <br /> <br />:2 of the test ',/ells. Much of the Ilydrologic data collected <br /> <br /> <br />by Mr. Powell is included in the present report. <br /> <br /> <br />Sever31 recent geologic investigations, of the fuel <br /> <br /> <br />and mineral resources, that include parts of the project <br /> <br /> <br />area are: Barnes, Baltz, and Hayes (19S4), Hayes and Zapp <br /> <br /> <br />(1955), Wanek (1954, 1959), Ekren and Houser (1957, 1958, <br /> <br /> <br />1959a, b, c, d), and Houser and Ekren (1959a and b). The <br /> <br /> <br />geologic maps in these reports and additional mapping by <br /> <br /> <br />the author were used in compiling the geologic map included <br /> <br /> <br />in this report (fig. 2). <br /> <br />Figure 2 (caption on next page) belongs near here. <br /> <br />I ~I' <br />