03-29-2012 Council Minutes - Laserfiche WebLink

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MINUTES CITY COUNCIL MARCH 29, 2012 Boss introduced the following resolution and moved its adoption: RESOLUTION NO. 2012 -3 -60 — CALLING A WORKSHOP MEETING FOR WEDNESDAY, APRIL 4, 2012 AT 7:00 P.M. RELATIVE TO THE LITTLE CANADA ROAD IMPROVEMENT PROJECT The foregoing resolution was duly seconded by Montour. Ayes (4). Nays (0). Resolution declared adopted. SANITARY The Public Works Superintendent reviewed his report dated March 21, SEWER 2012 outlining an expansion of the City's efforts in identifying inflow and SERVICE infiltration (I & I) problems in its sanitary sewer system. The INSPECTIONS Superintendent reported that while the City's flows have remained below the Met Council's threshold for excessive I & I, dry weather has likely played a role. Last year with the wet spring and early summer, the City had an 18.4% increase in treatment costs paid to the Met Council. Based on that number along, it is obvious the City has a fair amount of I & I in its system. The Superintendent reported that, to date, the city has inspected sump pumps, roof leaders, manholes, and its own sewer mains. One potential contributor that has not been investigates is leaks in private sanitary sewer service lines. Therefore, City staff is recommending that a representative sample of private lines be taken to project the level of I & I coming from these lines. The Superintendent reported that the property owner is responsible for the sanitary sewer line that runs from the house to the connection point at the sewer main. Many of these service laterals are made of clay or cast iron pipe, and past experience has shown some to have bad joints or cracks that allow groundwater to enter the pipe and eventually the City's main. The Superintendent reported that the city has video evidence of at least two services that show an estimated 10 to 15 gallons of water per minute leaking into the line. Sewer lateral made of PVC or ductile have not had as many problems. Keis asked approximately when the materials used for sewer laterals changed to PVC or ductile. The Superintendent replied that by mid to later 1990's this change was made. The Superintendent suggested that if this program is approved, an article will be included in the April newsletter asking for volunteers to have their service laterals televised by a contractor hired by the City. Staff will review the volunteers and determined whether or not a property would be a good candidate for this program and will select a number of services to 14