This subseries documents Fessler's work, in her capacity as a member of the Board of Supervisors, managing the activities of the Montgomery County Public Service Authority, which was created by the Board in the early 1970s to manage public utilities in the county. Records include background information on the organization of the Public Service Authority, correspondence, meeting minutes, agendas, financial statements, subject files. Also included is an oversize publication, "Recommended Service Areas," 1975, prepared for the Board of Supervisors. It includes several maps showing existing and planned development and the demand it would create for expanded water and sewer lines.