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<br />..... <br />- <br />r-- <br /> <br />': ) <br /> <br />,. <br />...., <br />-- <br /> <br />The initial development of alternatives involved consideration of <br />various generic components of any plan (collection of saline waters, <br />transmission, treatment and brine disposal). In this identification <br />process, a complete universe of options was evaluated to avoid <br />exclusion of the less obvious and/or creative options, while remaining <br />realistic concerning implementation constraints. Viable alternatives <br />were then selected using valid combinations of generic options through <br />six main analyses. First, a compatibility matrix revealed the degree <br />of relationship among options. Second, preliminary estimations of <br />environmental impacts associated with each option were recorded. <br />Third, water rights issues were taken into account. Fourth, options <br />were evaluated to see if they were feasible in relation to the <br />particular characteristics of the Glenwood-Dotsero Springs study area. <br />Fifth, cost estimating procedures were utilized to compare options. <br />Sixth, functional limitations of particular options were noted. <br /> <br />Fourteen combinations of these generic components were selected and <br />subjected to a further screening process. Tbe four parameters of <br />effectiveness, completeness, efficiency, and acceptability were used to <br />rank the alternatives in tabular form. This ranking, along with <br />supplemental factors involving potential and somewhat nonquantifiable <br />returns, was used to select five alternatives for further study. The <br />BOR added two plans to this list for a total of seven alternatives for <br />appraisal level design consideration. <br /> <br />The investigation and data acquisition for the PIQ effort involved an <br />extensive literature review and an analysis of available water quality <br />data (with primary source being the BOR spring monitoring data base). <br />Considerable information was found concerning the geology of the <br />project area. Bass and Northrup (1963), Mallory (1971), and Tweto, et <br />al. (1978) were especially helpful in this regard. Synthesis of <br />information collected revealed large deficiencies in hydrologic <br />information other than water quality. Barrett and Pearl (1978) and <br />Pearl (1979) were the only published sources identified which attempted <br />to describe the thermal groundwater systems at Dotsero, Glenwood <br />Springs, and South Canyon. These publications were general in nature <br />since subject matter included a comprehensive review of all geothermal <br />systems in Colorado. In the area of hydrology, recharge areas were <br />particularly hard to define because of a lack of information about the <br />potentiometric surface for the source aquifer. <br /> <br />The scope of the project and the sensitive environmental surroundings <br />were constraints to field investigation. Field visits involved a <br />reconnaissance of the spring sites and basic familiarization with the <br />surrounding geOlogy. Investigators were accompanied on particular site <br />visits by BOa personnel. A number of spring samples, both thermal and <br />nonthermal, were collected and analyzed. Large scale aerial <br />photography was flown over portions of the project area. <br /> <br />The PIQ results indicated that the saline springs are fed <br />groundwater system with little variability. Mass balance <br />indicated that the Dotsero saline springs contribute <br /> <br />by a stable <br />calculations <br />approximately <br /> <br />ii <br /> <br />~ <br />