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32 <br />3. EXISTING CONDITIONS <br />3.1 Sanitary Sewer <br />The majority of the sanitary sewer system in the project area consists of 9 -inch diameter <br />vitrified clay pipe (VCP) installed in the early 1960s. The joint sealing material in use at <br />that time was typically an oakum and bituminous material. Internal inspections with a <br />specially designed television camera have found the structural condition of pipe to vary <br />between fair and poor, with numerous offsetjoints, cracked segments, dips with solids <br />deposition, and some root intrusion and mineral deposits at joints. <br />3.2 Water main <br />The existing water distribution mains in the project area were also installed in the early <br />1960s and consist of 6 -inch cast iron pipe (CIP) at the intersections of Edward Street and <br />Harding Street and a 10 -inch CIP water main along Edward Street from 366i Avenue NE to <br />35°i Avenue NE. This system has had numerous breaks over the past few years and breaks <br />will become more likely as the pipes are approaching 50 years of service. In addition, the <br />cast iron pipes are probably heavily corroded and possibly leaking. <br />3.3 Storm Sewer <br />The existing storm sewer system in the project area consists of 18 -inch reinforced concrete <br />pipe (RCP) sewer along 36°i Avenue NE from Belden Drive to Coolidge Street with catch <br />basins installed at the low points where each street intersects with 36°i Avenue NE. The <br />existing storm sewer on Edward Street collects stormwater from Edward Street and 35°i <br />Avenue NE and conveys stormwater south to 35°i Avenue NE and to the Harding Street <br />holding pond. Water collected in the Harding Street holding pond ultimately discharges to <br />the Mississippi river. The existing storm sewer on 36`I' Avenue NE collects stormwater <br />from Belden Drive, Coolid e Street, Harding Street, and 36°i Avenue NE, and conveys <br />stormwater north across 3 tt i Avenue NE along the west side of Walgreens then east along <br />the railroad to the existing storm sewer on Silver Take Road, and ultimately to Silver Lake. <br />3.4 Streets <br />The proposed reconstruction area consists of 30 -foot wide concrete streets with curb and <br />gutter. Soil borings taken for the project indicate underlying soils in the area consist of silty <br />clay fill or sandy clay fill. Additional soil borings have been ordered and will be included in <br />the Appendix C if available at the time this report is completed. <br />2013 STREET AND UTILITY IMPROVEMENT PROJECT <br />FEASIBILITY REPORT <br />CITY OF ST. ANTHONY VILLAGE <br />WSB PROJECT NO. 1626-66 <br />PAGE4 <br />