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Member Kors stated that the intersection of Lexington and County Road B is in <br />need of some planting upgrades. Mr. Culver replied that there is not a landscape <br />plan laid out for that intersection specifically and commented that there is an <br />adjacent park, butthe other surrounding uses would make it difficult to puttogether <br />a plan. <br />Member Misra pointed out that the section of County Road C along Snelling has <br />been looking wonderful and commented on the nice work. <br />5. Sanitary Sewer Inflow and Infiltration Study Update <br />Mr. Freihammer stated that Civil Engineer Luke Sandstrom would give the <br />update. Mr. Sandstrom stated that the 2017 Inflow and Infiltration (I&I) study was <br />outlined in the packet provided. He summarized the information that was in the <br />packet and pointed out that 80 percent of the City's system was built between <br />1955-1965. He stated that some of the pipes are reaching their life expectancy. <br />Mr. Sandstrom stated that cracks in pipes lead to I&I. He explained that inflow is <br />a direct connection filtering water into the system and that infiltration is that water <br />entering the system through cracks. The City system is public but has many <br />private connections to each home. The privately -owned system is twice as long as <br />the city owned system. Mr. Sandstrom showed a graph depicting the sewer water <br />outflow and explained that higher outflows increase the costs that the City has to <br />pay to the Metropolitan Council. He stated that a third of the City's lines are <br />cleaned every year. He showed a few images of different pipes and stated that <br />while clay pipes crack concrete pipes erode. He stated that some pipes can be <br />fixed with pipe liners but explained that some pipes have to be dug up and <br />replaced. He said that the City started lining pipes in 2006 when the limits were <br />reached, and the Metropolitan Council regulated the City to pay fees or invest in <br />the system to reduce outflows. He stated that the overall goal would be to go <br />through the entire system within 18 years and explained that the City was broken <br />up into target areas. He showed a map that detailed areas that had higher I&I <br />contributions especially during heavy rain falls. The map also depicted parcels <br />that have non-compliant sump pumps in an attempt to target the issues on the <br />private side of the system; he stated there was an ordinance passed regarding the <br />illegal sump pump connections. He stated that the private system pipes are aging <br />just like the public system pipes; therefore, over the years the City has worked <br />with homeowners to replace private system infrastructure as projects are <br />happening and they can do so through assessments, so the cost is affordable. He <br />summarized the information that the City has available to residents to assist them <br />as well. <br />Member Trainer inquired about the 5-7 miles of lining and asked if that was in <br />addition to the normal project lining. Mr. Sandstrom replied that the normal <br />project lining is 5-7 miles and explained that they try to coordinate that with the <br />pavement projects and problem areas. <br />Page 2 of 8 <br />