This report is a case study on the process of developing interagency collaboration on behalf of emotionally handicapped children and their families. Based on a process evaluation conducted for the Multnomah (Portland, Oregon) Board of County Commissioners, the case study examines a therapeutic case advocacy project which sought to promote greater coordination among the county's school mental health program and five community mental health centers. The case study evaluates how the project organized, publicized, and established itself during its first year. The report discusses: project background (source of funding, project rationale, selection of participating organizations, and initial goals and assumptions); work group formation; planning and design for interagency collaboration; and service teams for project implementation (team processes, role clarification, accountability, and characteristics of referrals for services). Recommendations are offered for consideration in designing similar projects. An appendix contains a project description and administrative forms. (JDD)