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<br /> <br />2017 STREET AND UTILITY IMPROVEMENT PROJECT <br />FEASIBILITY REPORT <br />CITY OF ST. ANTHONY VILLAGE <br />WSB PROJECT NO. 2170-34 PAGE 4 <br />3. EXISTING CONDITIONS <br /> <br />3.1 Sanitary Sewer <br /> <br />The sanitary sewer system in the project area consists of 9-inch-diameter vitrified clay <br />pipe (VCP) installed in the early 1960’s. The joint sealing material in use at that time was <br />typically an oakum and bituminous material. An internal inspection, with a specially <br />designed television camera, will be completed with final design to determine the <br />structural condition of the existing pipe and individual services. <br /> <br />Internal inspections were completed with the 2015 Street and Utility Improvement <br />Project (located adjacent to the 2017 project limits) of the sanitary sewer system along <br />36th Avenue and Chelmsford Road prior to reconstruction. This area was also installed in <br />the early 1960’s. The inspection found the structural condition of the pipe to vary <br />between fair and poor, with numerous offset joints, cracked segments, dips with solids <br />deposition, and some root intrusion and mineral deposits at joints. Given the system <br />along 36th Avenue and Chelmsford Road was installed at approximately the same time as <br />those roads identified for improvement in 2017, the condition of the existing sanitary <br />sewer is assumed to be similar. <br />3.2 Water Main <br />The existing water distribution mains in the project area were also installed in the early <br />1960’s and consist of 6-inch cast iron pipe (CIP) main line. This system has had <br />numerous breaks over the past few years and breaks will become more likely as the pipes <br />have exceeded 50 years of service. In addition, the cast iron pipes are likely heavily <br />corroded and possibly leaking. <br />3.3 Storm Sewer <br />The existing storm sewer system in the project area consists of 15-inch reinforced <br />concrete pipe (RCP) along Penrod Lane and Skycroft Drive from 36th Avenue to <br />Maplewood Drive and 21-inch and 24-inch RCP along Maplewood Drive from Skycroft <br />Drive to Highcrest Road. <br /> <br />The existing storm sewer systems collects runoff from Penrod Lane, Skycroft Drive, <br />Chelmsford Road, and Maplewood Drive and conveys stormwater east to the 36-inch <br />trunk storm line along Highcrest Road. <br /> <br />22