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PROJ02100
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Last modified
8/15/2009 11:31:41 AM
Creation date
7/16/2007 3:08:38 PM
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Loan Projects
Contract/PO #
FS0045FX
Loan Projects - Doc Type
Contract Documents
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<br />Upper Colorado River Basin Study <br />Scope of Work <br /> <br />October 1, t 998 <br /> <br />fa~i1ities of in-basin water users will be provided to the Management Committee. This <br />information will be utilized in P ACSM and for scenario modeling to evaluate impacts to <br />in-basin water rights and users. <br /> <br />4.6 Review P ACSM West Slope Operations <br /> <br />Three half-day meetings will be held with Deriver Water staff to review and understand <br />the operational, water. rights and hydrologic assumptions in the West Slope portion of <br />Denver's PACSM model. These meetings will involve Hydrosphere, Denver Water staff <br />and other sponsoring parties. A memo documenting the results of these meetings will be <br />provided to the Management Committee. <br /> <br />4.7 Specify P ACSM Modeling Scenarios <br /> <br />A number of hydrologic scenarios will be explored in this Study, including today's <br />conditions and future scenarios. These scenarios will be evaluated for wet, dry and <br />average years based on a 1947-1991 hydrologic record. The existing and future scenarios <br />may have numerous areas of uncertainty that must be agreed upon by the sponsoring <br />parties and specified prior to modeling of the scenarios. <br /> <br />For example, Denver Water has a PACSM model run depicting the operation of Denver's <br />system at an existing average annual demand of265,OOO AF over the 1947-1991 period <br />of hydrologic record. The output from this run could reasonably be used to represent <br />"today's conditions". However it is not clear how Denver represents certain aspects of its <br />system and other systems in this run. For example, are modeled exchanges out of <br />. Wolford Mountain Reservoir occurring at significant levels? Are Windy Gap diversions <br />modeled at existing levels or full levels? What interpretations are embedded in the <br />modeled operation of Green Mountain Reservoir? Therefore, a series of two meetings is <br />anticipated to specify the assumptions and scenarios to be considered in terms of demand <br />levels, components and major assumptions. Prior to the m<tetings Hydrosphere and the <br />Management Committee will develop a list of factors to consider that bear upon these <br />scenarios. <br /> <br />Given the Study budget and schedule, a reasonable limit must be set regarding the <br />number of scenarios to be analyzed during Phase II of the Study. To facilitate future <br />problem solving discussions under Phase III of this project many future assumptions will <br />be lumped or weighted into two modeled scenarios: one that relies more heavily on <br />Denver's Grand County collection system and one that relies more heavily on their <br />Summit County collection system. An initially proposed list includes the following: <br /> <br />6 <br />
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