This report is the third in a series dealing with civil defense organizations. The first two reports documented the need during emergencies for a centralized organization to coordinate normally independent local jurisdictions. This report examines cost and feasivility factors that affect the ease of establishing such an organization. From quantitative considerations of the need for emergency interactions among local government functions, the report concludes that an essentially new form of organization must be planned for emergency coordinators. A new organization will require about 200 specially trained coordinators in Santa Clara County, California. Realistic planning, recruiting, training, and testing estimates for such a program imply a national civil defense in the order of two million dollar per year. Analyses of the lecal basis and potential local acceptance of centralized coordination in Santa Clara County indicate that an emergency organization would be feasible to establish using certain program guidelines. First, program direct costs would be most acceptable if supported by the federal government. Second, the organization should be locally tailored to existing government structures rather than patterned uniformly throughout the country. Third, the organization should be flexible to permit pre-emption of local authority in proportion to the severity of the emergency.