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. (1.4 million acre-ft) per year in the Colorado River Basin and 490 million m3 (400,000 acre-ft) per year in adjoining bas ins. Figure 2 shows the components of the Colorado River Basin augmentation plan with the core San Juan program. Two important studies are recommended as parallel efforts with the core pro- gram. The transferability studies are considered a scientific prerequisite to extension of operational precipitation manage- ment in other Colorado River subbasins. The parallel effort will insure that these studies are completed in time to meet the 1989 Basinwide operational date. The estimated cost of the 7-year transferability study program is 58.20 million. The second parallel study is the ground-based seeding feasibility study. Although it is not a prerequisite to beginning Basinwide operations in 1989, it is a highly desirable option to determine the viability of this seeding mode in view of its potential cost savings over aircraft seeding. The estimated cost of this 6-year optional study is $5.60 million. Funding requirements for the San Juan Operational Cloud Seeding Project and the parallel studies are shown by fiscal year in table 1. The proposed program outlines a plan to meet environmental and social impact analyses and the reporting requirements involved in the transition from research to operational precipitation management by the Federal Government. The San Juan Initiation and Preoperational Phases may qualify for a "categorical exclusion" frOD formal reporting requirements under Departmental and Water and Power Instructions. A formal environmental state- ment will be required to begin the Operational Phase. Public involvement and community response programs are highlighted as a key component of the overall project effort. Legal considera- tions and continuing questions concerning social costs related to precipitation management are discussed. 1-2