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3. EXISTING CONDITIONS 3.1 Sanitary Sewer 1 The sanitary sewer system in the project area consists of nine-inch (9") and 12-inch (12") diameter vitrified clay pipe (VCP) installed in the 1950's. The joint sealing material In use at that. time was typically an oakum and bituminous material. ' Previous internal inspections with a specially designed television camera have found the pipe to be in generally fair structural condition with numerous offset joints,some cracked segments,some root intrusion and mineral deposits at joints,and some dips with solids deposition. The 12" sanitary sewer on Wilson Street and 9" on 30"Avenue NE will be lowered to resolve sanitary sewer conflicts caused by the construction of a new trunk storm sewer system. ' 3.2 Watermain The existing water distribution mains in the project area were installed in the 1950's ' of 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 50 years of service. In addition, the lead goosenecks may be a source of lead in the residential water supply and the cast iron pipes are ' probably heavily corroded and possibly leaking. 3.3 Storm Sewer tThe existing storm sewer consists of a 36-inch(36")RCP which flows from north to south along Wilson Street from 30' Avenue to 291 Avenue. The existing storm ' sewer on 30'Avenue consists of 12-inch(12")and 15-inch(15"). Also,the existing storm sewer on West Armour Terrace is 18 inches (18"). ' The storm water conveyance system within Wilson Street is considered a trunk system which receives water from approximately 330 acres. During heavy rainfall conditions,the storm sewer is not adequate to collect the runoff and convey it from the street area. Intersections regularly are flooded with a few inches to a few feet of water. In some cases the water level is high enough to flow from the roadway into adjacent garages and basements. 3.4 Streets ' Wilson Street, 30'h Avenue NE and West Armour Terrace are all 30 foot(30') wide streets with concrete curb and gutter and driveways. No borings were taken for these ' streets but other borings in the area have indicated there was approximately 5 inches 1 City of St.Anthony-2001 Street&Utility Improvement Project Feasibility Report ' WSB Project No.1065-511 Page 3