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<br />0023U3 <br /> <br />The Bureau of Land Management manages the public lands to assure that <br /> <br />full use potentials are realized. This demands that there be continuous coop- <br /> <br />eration with local, county, State, and Federal agencies so that multiple use <br /> <br />management 'will be achieved to the greatest possible extent.' <br /> <br />The BLM and the Bureau of Indian Affairs have serious problems in COm- <br /> <br />. <br /> <br />mon on the management of public lands in and adjacent to Indian reservations. <br /> <br />A great deal of trespass i.s encountered which has resulted in terrific over- <br /> <br />grazing of some areas. A serious overgrazing situation exists on the with- <br /> <br />drawal created by Executive Order 5889. which withdrew la!ld in New ,Mexico <br /> <br />to aid the San Carlos Indian Irrigation project in Arizona. Since there is <br /> <br />( <br />doubt about the land ever being used in connection with the San Carlos Indian, <br /> <br />Irrigation project, c-onsideration should be given, to placing iturider mulFple <br /> <br />use management again. <br /> <br />The Geqlogical Survey collects and publishes data on water uses, quantity, <br /> <br />and quality. While there is a great deal of information available, much more <br /> <br />is needed on groundwater and c:>n sedimentation to facilitate proper management <br /> <br />. <br /> <br />of the public domain lands., For instance, little .information is available on <br /> <br />sedimentation and the particular character and location of the grazing land <br /> <br />which contributes to the tremell:dous load of silt carried by the Colorado River <br /> <br />and its tributaries. It is estimated that 147 million tons of sediment are trans- <br /> <br />ported through the Grand Canyon each year by the Colorado River. Erosion <br /> <br />control throughproper management and construction,of se,dimentation barriers <br /> <br />3 <br /> <br />