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ATTACHMENT A <br />SCOPE OF SERVICES <br />FOR PROGRAM PLAN DEVELOPMENT <br />PRECIPITATION MANAGEMENT DEMONSTRATION PROGRAM <br />PURPOSE <br />This document describes the activities and cost required to <br />develop a program plan for a precipitation management (cloud <br />seeding) demonstration program in the Colorado River Basin. The <br />completed program plan will describe the technical basis for, and <br />all activities and costs required to conduct a multi -year <br />demonstration program to validate, quantify, and transfer cloud <br />seeding technology within the Colorado River Basin. <br />INTRODUCTION <br />The need for additional water in the Colorado River Basin has <br />been recognized and studied for many years. In 1983, the Bureau <br />of Reclamation (Reclamation) proposed the Colorado River Enhanced <br />Snowpack Test (CREST) as a program to demonstrate and quantify <br />the potential of precipitation management to augment the flow of <br />the Colorado River. At that time, the Secretary of the Interior <br />determined that cloud seeding was the most cost effective and <br />promising means of providing additional freshwater supplies. <br />CREST was never as the Basin subsecuently experienced a <br />period of high river flows. That situation has-reversed-itself <br />with the drought of the past several years. The Basin States <br />recognize that the need to develop additional water supplies <br />still exists and that cloud seeding is one technology that can be <br />applied to meet growing demands. <br />Current cloud seeding technology an to be able to increase <br />winter snowpack in many mountainous areas of the Colorado River <br />Basin. The latest American Meteorological Society (AMS) 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. Increase of the order of 10 percent <br />in seasonal precipitation are indicated in some areas." The <br />policy statement does caution that "In all cases where indication <br />of precipitation increases have been suggested, confirmatory <br />10 <br />