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<br /> <br />C'.l <br />c") <br />~.j'< <br />N <br />c' <br />"", <br />....... <br /> <br />BACKGROUND <br /> <br />, ~.',' <br /> <br />Section 1 <br /> <br />INTRODUCTION <br /> <br />Under the Colorado River Water Qual ity Improvement Program (CRWQIP), the <br />Bureau of Reclamation is studying opportunities for collecting and using <br />sal ine water sources for beneficial industrial purposes [IJ (references are <br />shown in Section 9.) This study evaluates the use of the Lower Virgin River <br />Unit water of the CRWQIP as an alternate water supply for the Harry Allen Gen- <br />erating Station. Harry Allen Station is presently in a conceptual design <br />phase and will be located about 25 miles northeast of Las Vegas, Nevada. The <br />study was performed in cooperation with the Bureau of Reclamation and Nevada <br />Power Company. <br /> <br />The objective of the study was to determine the in-plant cost difference for <br />using either the Lower Virgin River Unit water or the Clark County secondary <br />treated sewage effluent as the primary makeup water supply to the Harry Allen <br />power plant. <br /> <br />~, <br /> <br />i ;;;\ <br /> <br />OBJECTIVE <br /> <br />,'.'; <br /> <br />:< <br />"~';': <br /> <br />~. <br />;,' <br /> <br />STUDY APPROACH <br /> <br />" <br /> <br />The study was organized as a team effort including Jack Laughl in, Rick <br />Schroeder, Roger Jorden and Stearns Catalytic Corporation. The study involved <br />the fol lowing major steps. <br /> <br />.:' <br />'" <br /> <br />,;'; <br /> <br /> <br /> . <br />" <br />~~, . <br />..... <br />5;.' <br />...: <br />f;l . <br />>, <br /> . <br /> <br /> <br />,',.. <br />;>i <br /> <br />"-' <br />,'0 <br /> <br />:"~'>~ <br />! ~;i;; <br />! ;;f <br />'~,-;~ <br /> <br />. <br /> <br />Review of present and past studies and data for the Harry Allen <br />power plant <br /> <br />· Characterization of water quality for the secondary sewage effluent <br />and Lower Virgin River Unit water sources <br /> <br />· Review and selection of commercially viable saline water use tech- <br />nologies <br /> <br />Development of water treatment process designs options for both the <br />secondary sewage effluent and Lower Virgin River Unit water sources <br /> <br />Economic modeling and levelized cost comparison of the selected <br />water treatment process options <br /> <br />Economic sensitivity analysis of major cost variables <br /> <br />Comparison of the level ized in-plant cost-effectiveness for salt <br />removal from the Colorado River system <br /> <br />. <br /> <br />Comparison of the levelized in-plant costs for secondary sewage ef- <br />fluent vs. Lower Virgin River Unit water <br /> <br />1-1 <br />