Resolutions-1997-021

6. No corrugated PVC pipe shall be used within public right-of-way or with easements shared with other utilities except for subsurface drainage pipes. 7. No corrugated PVC pipe shall be used where the pipe crosses easements used by other utilities. D. Subsurface Drainage Pipes meeting the following specifications may be used for subsurface drainage systems: 1. Corrugated PVC with a smooth interior wall meeting the standards of ASTM F949-90 constructed of resins meeting the requirements of ASTM D1784, cell class 12454B may be used for 6 inch, 8 inch, and 10 inch diameters. 2. Corrugated HDPE with a smooth interior wall from a manufacturer approved by the City Engineer may be used for 6 inch diameter. 3. All subsurface drainage pipes shall be perforated and shall be protected by a fabric sock or freely draining aggregate placed around the pipe. Subsurface drainage pipes serving as pavement sudsdrains shall be surrounded by a freely draining aggregate that extends up to and contiguous with the aggregate base of the pavement. E. The designer shall specify pipe material, bedding and trench width to withstand anticipated dead and live loads. Minimum pipe bedding shall be Class B or as shown in Figure 8.4. F. See pipe bedding diagrams, Figure 8.4. 9.08 MANHOLE AND INTAKE STANDARDS A. Manholes or intakes shall be located as follows 1. At the end of each line. 2. At all changes in grade, size, or alignment. 3. At all intersections of pipes. 4. At distances not greater than 400 feet for sewers 15 inches or less in diameter and 500 feet for sewer 18 inches to 30 inches in diameter. Greater spacing may be permitted in larger sewer. 5. Flared end sections are required at all storm sewer line outlets and shall include RF14 ties and rip-rap as recommended by the City Engineer. B. Minimum Drop Access Manholes 1. For the same size pipe with a change in alignment of 45 degrees or less, no drop is required.