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<br />.. <br /> <br />.. <br /> <br />UNITED STATES <br />DEPAR TlffiNT OF 'lHE INTERIOR <br />BUREAU OF RECLAMATION <br />RSGION 4 <br />Post Office Box 360 <br />Salt Luke City 8, Utah <br /> <br />April 8, 1949 <br /> <br />This report summarizes progress made on investigations in Colorado <br />during March 1949. <br /> <br />(1) Pro~ress of Investigations <br /> <br />(a) New investigations proposed: None <br />(b) Revision of current program' None <br />(e) Progress of current investigations (detail listing follows): <br /> <br />Colorado River Project, Colorndo-New Mexico-Utah-Wyoming <br /> <br />The preliminary draft of the engineering plans, designs and estimates <br />chapters for the interim project report was completed. A study was initiated <br />to detennine what public lands within the proposed reservoir sites in the <br />Colorado River Basin should be recommended for withdrawal. Rovisions to <br />the system resQrvoir operation studies were made. Extensive revisions to <br />the system powGr studies were made in connection ~ith the preparation of <br />the interim report. Studies of power production at "year 21" and "year 75" <br />were added to previous studies. Further revisions to the substantiating <br />report were made in accordance with the regional office review thus enabling <br />its completion. <br /> <br />Echo Park Unit, Colorado-Utah. Reservoir operation studies were <br />continued by the area office. Since the Echo Park unit will be recom~ <br />mended for construction in the initial phase of development under the <br />Colorado River Storage Project, a separate report will not be made for <br />this unit. <br /> <br />Gunnison-Blaok Canyon unit, Colorado. <br />surveys of potential reservoir sites on the <br />oompleted, Foundation exploration work was <br />site on treUnc~~pahg~e River. <br /> <br />Reconnaissance topographic <br />Uncompahgre River were <br />started on th~ Ridgeway Dam <br /> <br />Whitewater Unit, Color~do. Preliminary designs and estimates for <br />the Knhnah Creek Canal wore completed by the Kegional Office. <br /> <br />;"P <br />',-.:) <br />'j) <br /> <br />Glen Canyon Uhit, Arizona-Utah. A slight revision was made to <br />previous computation of net evaporation losses ~t Glen Canyon Reser- <br />voir. Reservoir operation studies unl er various assumed schedules <br />of upstr00m development were oontinued and individual and oombined <br />power production, studies were aocomplished in connection with revised <br />upstretlID development schedules by the Ilrea office. <br />