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<br />tremendous tOl:lnageof uranium ore whioh,has beell de1Teloped in the area.
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<br />The Intermountain Chemical Company has completed the No.33 shaft to
<br />the tropa horizon near GreenRiver,1oTyoming. The shaft is 1650 feet deep
<br />and will be used primarily as aventj,latingshaft for the mine. The company
<br />has been mining the trona Qepolilitand procl1lssing the ore into soda ash
<br />since 1947.
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<br />, The utah ,Power & Light Company is constructing a 100,000 KW addition
<br />to its 'steam power plant at Castlegate, Utah. The initial plsnt with a
<br />,potential of ~6,000 KW was completed in 1955. The plant is adjacent to
<br />the Castlegate mine of the Independent CO,al & Coke Company which mille will
<br />furnish the bulk of the 1700 tons of coal required each day by the plapt
<br />when copst.ruction of the addition is completed. At present, the 66,000
<br />KW plallt is consum,ing 800 tons of coal per day.
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<br />On August 10, 19551 regu;Lations coverillg the leasillg of metallic and
<br />conmettalic minerals,otherthan coal, phosphate,potassilll!l, and sodium,
<br />ill the Lake Mead Recreation Area, Nevada, were promulgated. Sillce that
<br />time nUmerous lease applicatiolls have been filed coverillg such minerals ani
<br />elements as baI.'ite, gypsll/ll, ,uranium, copper, 'manganese, tungsten,and
<br />ti tariium. It: is believEld that 'many more lease applications wiJ} be filed
<br />in th!l future as the mQre' inIlccessi,ble portions of the Lake Mead Area are-,
<br />pro~ected.
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<br />Q.!:ologic and'M:ln,eral Resource Surveys and Mappillg
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<br />During July-December 1956 more than 100 projects were concerned with
<br />the investigation of the mineral and mineral fuel resources and the general
<br />geology of the Pacific Southwest Region. Many of these investigations
<br />were conducted ,in cooperation with the Atomic Energy Commission in the
<br />,search for, and appraisal of uranium' reserves. Several of the others were
<br />in cooperation With the (Jalifornia Divis1011 of Mines. the Nevada Bureau of
<br />Mines, and the Colorado Metal Min:\.ng Boa.rd, resp.ectivll1y; and one each in
<br />cooperation with theAri~na'Bureal1 of JVlines, theU. S. BUZ'eauof Indian
<br />Affairs, and the U. S. Navy.
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<br />,'The followillg' arep:fojects or accomplishments ofparticularnotet
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<br />The Sear lees La)<:e area is being studied and mapped. A preliminary
<br />geologic map, and evaluation of the saline deposits will result from this
<br />study. '
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<br />A project has recently been started in the Klamath 1"lOuntaillS to map
<br />the, geQlogy of two and ,olle~half15-minute quadrangles and to study the gold
<br />and copper' depoits in the area.
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<br />studies of the surf:l.cial geology are in progress:in the Amargosa Valley,
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