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<br />o <br /> <br />-"::")- <br /> <br />--.) <br />.... <br />N <br />~ <br /> <br />Arkansas River and Tributaries above John Martin Dam, Colorado <br /> <br />.( . <br />_ _ __ T~~_ ~oa~~lso considere~the me~i_t! of a~t~orizatio~ Cl:n.d cons~u.ction_ __ __",,_ <br />, . , <br /> <br />of a short reach of the river channelization project to be used as a part of <br /> <br />the study to evaluate the environmental impact of this type of improvement. <br /> <br />In addition, several organizations expressed an interest in a pilot study <br /> <br />on one reach to improve the estimates of the quantity of water that can be <br /> <br />salvaged by this type of improvement and to evaluate the effectiveness of <br /> <br />the drains associated with the channelization. Construction of a reach of <br /> <br />the channelization in conjunctit;>n with the local protection project at La <br /> <br />......... <br />~::..:.~~i.~j: <br />~~;i.~..:.~.j <br /> <br />Junta could be used by these interests for such studies. The most appro- <br /> <br />priate reach for the above purposes is considered to be the 7-mile reach <br /> <br />from the mouth of Timpas Creek to the local protection project at La Junta <br /> <br />l-,....: <br /> <br />and would include: levees with tiebacks and lands ide drains of sufficient <br /> <br />.:~.:>' <br />;,'>"'~.-..' <br />:.".: <,~~":' <br />....">..'.'. <br /> <br />length to test the water salvage capabilities in the rural area, and one <br /> <br />-, <br /> <br />;;.'<.;t,.~ <br /> <br />OxbOW fishery and an area suitable for wildlife management studies. The <br /> <br /> <br />benefit-cost ratio for the improvement is 1.9. The Board believed. however, <br /> <br />that the decision to construct this reach of channelization should be left to <br /> <br />\'tw..... <br />'_"J' <br />'; ":~l~~, <br /> <br />~tN~ <br /> <br />the discretion of the Chief of Engineers at the time the j>lan of study has been <br /> <br />developed for the environmental impact study. <br /> <br />With regard to Fountain Dam and Lake the Board noted that the South <br /> <br />Central Regional Director of the Federal Water Pollution Control Admlnistra- <br /> <br />tlon has indicated that a cursory examination of the stream quality condition <br /> <br />at Fountain Dam and Lake site reveals a potential problem of serious conse- <br /> <br />,,/" <br /> <br />quences. The Director recommended that a careful evaluation of the waste <br /> <br />. <br /> <br />load contribution to the reservoir be completed prior to requesting authorization <br />3 <br /> <br />... ........ <br />,.F.. . <br />