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The alley south of 27th Avenue NE from Stinson Boulevard to Wilson Street • 3 91h Avenue from Silver Lake Road to Fordham Drive • The replacement and enlargement of the sanitary sewer main from the intersection of 3 91h Avenue and Fordham Drive east to Chandler Drive and north in Chandler Drive to Foss Road The project area is identified on Figures 1, 2, and 3 in Appendix A of this report. 2.5. Project History This project was initiated through the recognition of the following conditions in the project area: • Deterioration of street conditions • Re -occurring watermain breaks in the project limits • Sanitary sewer system back-ups into adjacent homes • Streets, sanitary sewer, watermain lines are over 50 years old and are exhibiting deterioration problems As a result, the City Council provided funding in the 2007 budget for street and utility improvements. On August 8, 2006, the St. Anthony City Council authorized the preparation of an engineering feasibility report for the 2007 Street and Utility Improvement Project. • t • 3.1. Sanitary Sewer The majority of the sanitary sewer system in the project area consists of 8 -inch, 9 -inch, and 10 -inch diameter vitrified clay pipe (VCP) installed in the 1950s. The joint sealing material in use at that time was typically an oakum and bituminous material. Internal inspections with a specially designed television camera have found the structural condition of pipe to vary between fair and poor with numerous offset joints, cracked segments, dips with solids deposition, and some root intrusion and mineral deposits at joints. 3.2. Watermain The existing water distribution mains in the project area were installed in the 1950s and consist of 6 -inch and 8 -inch cast iron pipe (CIP). The service connections are expected to have lead "goosenecks" and galvanized or copper service lines to the individual homes. In general, the system has provided good service, but main breaks are becoming more likely as the pipes approach 60 years of service. In addition, the lead goosenecks may be 2007 STREET AND UTILITY IMPROVEMENT PROJECT FEASIBILITY REPORT CITY OF ST. ANTHONY WSB PROJECT NO. 1626-22 PAGE 3