Laserfiche WebLink
' likely as the pipes approach 50 years of service. In addition,the lead goosenecks may <br /> be a source of lead in the residential water supply and the galvanized pipes are <br /> probably heavily corroded and possibly leaking. <br /> 3.3 Storm Sewer <br /> The existing storm sewer consists of a 36-inch(36")RCP which flows from north to <br /> south along Wilson Street from 29`h Avenue to 27`h Avenue. In addition, the alleys <br /> located both north and south of St.Anthony Boulevard between Wilson and Coolidge <br /> Streets contain 15-inch(15") RCP pipes. <br /> ' The storm water conveyance system within Wilson Street is considered a trunk <br /> system which receives water from-approximately 330 acres. During heavy rainfall <br /> conditions,the storm sewer is not adequate to collect the runoff and convey it from <br /> the street area. Intersections regularly are flooded with a few inches to a few feet of <br /> water. In some cases the water level'is high enough to flow from the roadway into <br /> adjacent garages and basements. <br /> 3.4 Streets. <br /> tWilson Street is a 30-foot(30')wide residential,street with concrete curb and gutter <br /> and a few driveways. An initial soil boring indicates that the street has about five <br /> inches(5")of bituminous paving over two and one-half feet of silty sand fill. Sandy <br /> ' lean clay underlies the fill material. No water table was observed in the boring <br /> completed in August 1998. <br /> ' Pahl Street is a 30-foot(30')wide residential street with concrete curb and gutter and <br /> a few driveways. No soil borings were made on this street segment but it is <br /> ' anticipated that the materials will be about five-inches (5") of bituminous material <br /> over fill and sandy lean clays similar to those found on adjacent Wilson Street. <br /> ' The existing alleys in the project areas are paved with two to four inches (2" to 4") <br /> of bituminous material which was placed directly on silty clay or clayey sand fill <br /> according to two soil borings completed in August 1998. The boring in the alley <br /> south of Pahl Avenue identified a three-foot(3') layer of organic silt about six feet <br /> (6)below the alley surface. No water table was observed in either of the initial soil. <br /> borings in the alleys. <br /> 1 <br /> 1 <br /> 1 City of St.Anthony-1999 Street&Utility Improvement Project <br /> Feasibility Report A <br /> WSB Project No.1065.21 WSB <br /> . .M <br /> Page 5 <br />