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CMP Part 4C. Comarehensive Sewer Policv Plan <br /> � Sump pump inspections were initiated in 1993 and a majority of the system was . � <br /> inspected over a period of about four years. The initial inspections identified <br /> approximately 5% ofthe homes in the "wettest" areas had sump pumps that were <br /> connected to the sanitary sewer. These sump pump connections were removed <br /> following the inspection work. <br /> Orono is particularly challenged because much of the sewer system exists along <br /> ' the shores of Lake Minnetonka to serve the nearly 1000 lakeshore homes. <br /> ' Portions of the system near or below lake level are highly susceptible to UI and <br /> remain a major focus of the City's UI reduction efforts. <br /> . I/I Goals <br /> The Metropolitan Council has established an UI goal of the allowable peak hourly <br /> flow rate as shown below which varies based on annual average flow. The <br /> forecasted wastewater flows are based on historical wastewater flow data and the <br /> Met Council's projected sewered household and employment data. <br /> � Year 2010� 2020 2030 <br /> Average Annual Wastewater Flow(MGD) . 0.63 0.7 0.71 <br /> Allowable Peak Hourl Flow(MGD) 2.14 2.31 2.34 <br /> Orono acknowledges this goal, and will continue its efforts at UI reductions by <br /> continuing its current ongoing system defect identification and rehabilitation <br /> program, and will strive to eliminate sources of excessive UI where it can be cost- <br /> effectively eliminated. <br /> The City has committed to expending approximately $90,000 in FY 2008 on <br /> activities directly related to the reduction of I/I. These activities include <br /> � continued televising of sewer lines to locate breaks or leaks;,repair or replacement <br /> of these problems as they are identified; upgrading and refurbishing of existing <br /> manholes to eliminate infiltration or inflow problems; etc. Specific UI reduction <br /> projects scheduled for 2008/2009 include_ <br /> - Rehabilitation of all manholes on Cherry Avenue, Minnie Avenue and <br /> Maple Avenue; <br /> - Complete replacement of major segments of gravity main lines in Casco <br /> Point Road, Carman Road, Frederick Street, Casco Avenue, and Casco <br /> �, Circle; and <br /> , <br /> � - Slip lining of many segments of gravity main lines on Casco Point <br /> - Sump pump inspections in the service areas of City lift stations 7 and 8 <br /> (Casco Point area) <br /> City of Orono Community Management Plan 2008-2030 Page 4C-64 <br />