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SEMT BY :USER LOWER GOLO REGIO 2 -21 -92 ; 9 :45 ; AUMiNiSTRATI OrG- 8U153197U5;42U <br />ATTACHXZNT B <br />SCOPE or SERVICES <br />FOR PROORAX PLAN DE"LOPMENT <br />OF A <br />PRECIPITATION KANAGMUI iT ACTIVITY <br />PURPOSE <br />This document describes the activities and funds required to <br />develop a program plan for a precipitation management (cloud <br />seeding) demonstration activity (Program Plan) in the Colorado <br />River Basin (Basin). The completed Program Plan will describe <br />the technical basis for, and all activities and monies required <br />to conduct a multi -year demonstration activity to validate, <br />quantify, and transfer cloud seeding technology within the Basin. <br />INTRODUCTION <br />The need for additional water in the Basin has been recognized <br />and studied for many years. in 1483, the Bureau of Reclamation <br />(Reclamation) proposed the Colorado River Enhanced Snowpack Taft <br />(CREST) as a program to demonstrate and quantify the potential of <br />precipitation management to augment the flow of the Colorado <br />River. At that time, the secretary of the Interior determined <br />that cloud seeding was the most cost effective and promising <br />means of providing additional freshwater supplies. CREST was <br />never initiated as the Basin subsequently experienced a period of <br />high river flows. That situation has reversed itself with below <br />normal runoff during the past four years. Reclamation, the Basin <br />States, and the Cooperating Partners recognize that the need to <br />develop additional water supplies still-exists and that cloud <br />seeding is one technology that can be applied to meet growing <br />demands. <br />Current cloud seeding technology appears to be able to increase <br />winter snowpack in many mountainous areas of the Basin. The <br />latest American Meteorological Society policy <br />statement on weather modification states "Precipitation amounts <br />from certain cold orographic cloud systems apparently can be <br />increased under favorable conditions with existing technology in <br />the western United States. Increases on the order of 10 percent <br />in seasonal precipitation are indicated in soma areas." The <br />policy statement does caution that "In all cases where <br />indications of precipitation increases have been suggested, <br />confirmatory experiments are required before any of the <br />technologies can be considered scientifically proven." <br />18 <br />