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2.5. Project History ' This project was initiated through the recognition of the following conditions in the project area: ' Deterioration of street conditions Reoccurring street flooding and inundation of homes from storm water The lack of capacity in the sanitary sewer system which results in frequent back- up of the sanitary line into tributary homes The streets, sanitary sewer, water main lines are approximately 40 years old and are exhibiting deterioration problems ' As a result of City Staff recommendations, storm water management task.force recommendations, engineering analysis of selected flood problem areas within the City of St. Anthony recommendations, and preliminary recommendations from the Sanitary Sewer Feasibility Study; the City Council provided funding in the 2002 budget for street and utility improvements. In addition, funding was also provided from the Minnesota Department of Natural Resources to complete improvements within the project area. On June 26, 2001 the St. Anthony City Council authorized the preparation of an engineering feasibility report for the 2002 Street and Utility Improvement Project. The project includes the construction of a new trunk storm sewer system to accommodate storm flows which currently inundate structures and flood streets in excess,of two feet in the project area. Continuing inundation of streets has lead to the deterioration of catch basins and pavements within the project area. ' 3. EXISTING CONDITIONS ' 3.1. Sanitary Sewer ' The sanitary sewer system in the project area consists of nine-inch(9") and 10-inch (10") 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. 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. ' City of St.An tho ny—2002 Street and Utility Improvement P r o ject Feasibility Report ' WSB Project No. 1065-592 Page 3