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<br />'. <br />,;....r /,0 <br />,-Q."1,,1 <br /> <br />. <br />Water Oualitv <br /> <br />No impacts to.water quality would occur under no act jon, because no construction activities would be <br />undertaken. . <br /> <br />Construction Alternative <br /> <br />Pueblo West Water Use and Arkansas River Conveyance <br /> <br />The Construction Alternative is expected to provide Pueblo West with sufficient means to convey <br />water for full design build out population of 60,000 residents. Pueblo West estimates they would <br />reach full build out sometime in 2019. <br /> <br />Under this alternative, annual water use is expected to be 10,763 AF or a monthly average of 934 AF <br />at full build out in 2019. This equates to an approximate average daily flow of 15.6cfs, or <br />approximately 6.6 cfs more than under no action. <br /> <br />Again, this amount of increase in deliveries to PuebloiWest is not anticipated to have any impact on <br />net Arkansas River flows. The State and ReclamatioIl anticipate continuing their collaboration to <br />regulate Arkansas River flows by adjusting Project fldws for the foreseeable future. <br /> <br />West Pueblo Ditch <br /> <br />The Construction Alternative could impact flows to the West Pueblo Ditch. Pueblo West anticipates <br />using the existing structure that diverts water to the West Pueblo Ditch to also divert water to their <br />proposed river intake. Pueblo West would stabilize t~e existing diversion structure by, most likely, <br />pressure grouting the structure. Consequently, there i$ potential for the Construction Alternative to <br />have both temporary and long-term impacts on West Pueblo Ditch diversions. Temporary impacts <br />would most likely occur due to construction activities in or near the stream channel. Long-term <br />impacts could result from modifications of the channel or the diversion structure that result in _ <br />permanent impacts to West Pueblo Ditch diversions. <br /> <br />The following mitigation measures are proposed to a~oid both the potential temporary and long-term <br />impacts of the Construction Alternative. . <br /> <br />. Pueblo West will coordinate all construction and maintenance activities associated with the <br />proposed action with Lake Pueblo State Park and Reclamation's Pueblo Field Office. Every <br />effort will be made by Pueblo West to conduct construction activities at a time and/or in a <br />manner that has no impact on use of West PuelJlo Ditch diversions. No activities shall be <br />permitted to occur until written notice has been provided by each entity indicating that they are <br />aware of the request to proceed with work and! concur with the timing of the work and <br />measures to minimize the impacts. <br /> <br />. Pueblo West shall allow Lake Pueblo State Park and Reclamation to review any design plans <br />that involve the stream channel, streamside or diversion structure at least 60 days prior to <br />planned construction. Every effort will be made to accommodate requests to modify the plans <br /> <br />12 <br />