20220706 09421700 1.0 TRUE sControlValve Control Valves are used to control pressure, or directional flow of sewer throughout the sewer system. A check valve will be placed on sewer mains to ensure that back flow does not happen. The valves are mapped from georeferenced engineering as-built record drawings. The engineering drawings, as well as GPS points collected in the field, provide various attribute information. City of Fort Worth, Water Department, Water IT GIS