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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />9 <br /> <br /> <br />4. The su~ce8s of any proposed drainage system for the Mosca-Sargent <br />area would depend on a conveyance channel; therefore, this project <br />should be incorporated with the conveyance chanoel to other areas. <br />A possibility would be the conveyance channel to McGinty; however, <br />an independent conveyance channel might serve the project better. <br />A preliminsry study would determine this and also the value of the <br />project in terms of salvaged water and othsr benefits. <br /> <br />5. Channelization of the Rio Grande between Alamosa and Del Norte would <br />involve problems in number and scope which would make it essential to <br />carry on an elaborate feasibility study prior to any more advancsd <br />work. TWo considerations of particular concern would be the acquisition <br />of rights of way through relatively high cost land and the design of <br />replacement diversions for the larger water users in a manner satis- <br />factory to both the water users and the administrators. <br /> <br />6. Reduction of phreatophytes might eventually become a project separate <br />snd distinct from othsrs. At this time it would be done most efficiently <br />as a subsidiary item of work in connection with channelization projects <br />on the Rio Grande, Conejos and San Antonio Rivers. <br /> <br />Chsnnelization projects will necessarily eradicate and control phreato- <br />phytes in the construction areas involved. After decisions are made <br />in regard to channelization, the adoption of additional messures to <br />control growth of phreatophytes may be desirab16, or even necessary. <br />Information available from different sources is in agreement that the <br />volume of water to be salvaged in this manner is subatantial and addi- <br />tional benefita such as land reclamation and insect control can result <br />if proper planning is used. <br /> <br />7. No study of the possibility of additional transmountain diversion has <br />been made. Inquiries made to persons knowledgeable in water matters <br />indicate that all streams in the State of Colorado are overdecreed. <br />This indicates that additional transmountaio diversions could be used <br />only during very limited psriods. Ordinarily it should bs expected <br />that such periods of use would be limited to winter months when accessi- <br />bility would be difficult and flows would be'at a minimum. Even then <br />tranemountain diversions would be subject to senior storage rights. <br /> <br />While this matter may be investigated further it appears that this is <br />not a promising source of additional water. <br /> <br />8. It has been known for some time that water leaves the channel of the <br />Rio Grande above the Lohatos gaging station and flows in cracks and <br />crevices in the canyon, raentering the river near and south of the <br />State line. This water is not measured for crsdit at the gaging station. <br />This condition existed prior to ratification of ths Compact. As the <br />stipulations contained in the Compact are related to and based on <br />conditions existing at the time the Compact was formulated it is doubtful <br /> <br />0511 <br />