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<br />City of Gem Lake Comprehensive Plan GEMLK 140643 <br />Page 69 <br />insurance for private sewer connection to owners whose sewers cause damage to the <br />City’s municipal system. LMC have noted increased claims in specific areas of sewer <br />systems throughout the state. One item of notice is VCP sewers having higher than <br />normal claims. They have suggested a cleaning of VCP sewer pipes every three years. <br />7.4 Recommended Maintenance Program <br />Because of the high percentage of VCP pipe comprising the sewer system in Gem Lake, <br />those portions of the system should be more closely evaluated for replacement or lining <br />to negate the concerns of root intrusion and to implement the maintenance schedule <br />suggested by LMC. <br />Proper monitoring and maintenance of the existing system is an important factor in the <br />long-term viability of the system. Maintaining the system extends the life of the system <br />and decreases the likelihood of sewer backups. Sewer backups often lead to property <br />damage claims against the City. This results in increased costs to the City to pay those <br />claims with associated increases in insurance premiums. It is recommended to create a <br />program specifically for VCP cleaning, televising and rehabilitation to ensure the system <br />lasts and to reduce potential expenses from collapsed/broken sewers or other backups <br />that result from lack of maintenance. <br />7.4.1 System Cleaning <br />Gem Lake will maintain their sanitary sewer collection system. The City’s sanitary sewer <br />line consists of the main trunk line and does not include service leads off of the main <br />trunk line. Private property owners are responsible for the maintenance of the private <br />service lines from the City’s main line to any building or private property. The City will <br />clean/maintain its sanitary sewer line every three years. Adjustments to maintenance <br />schedules may become necessary in the case of unforeseen or uncontrollable <br />circumstances. Problem areas such as an area that has had a sewer backup, blockage, <br />or a known problem such as grease accumulation or shallow slope will be cleaned twice <br />per year, for the first year. If there are no further problems, it will be cleaned once the <br />second year and then to a regular schedule the third year. <br />7.4.1.1 Equipment <br />Lines will be cleaned with a jetter or jetter/vacuum truck or rodder machine. The <br />equipment used depends upon the location, type of line, and if there are any known <br />problems that are more suitable to a particular method of cleaning. Each pipe section will <br />be inspected by (CCTV) television camera every 10 years. Any pipes that are located on <br />a street where a street maintenance project is planned will be inspected prior to the start <br />of those projects. The City will also televise any sewer lines in a new development before <br />the City accepts any responsibility for maintenance of those lines. Televising will also be <br />performed to inspect lines where there may be possible problems or where problems are <br />occurring. <br />The lines will be visually inspected by looking down manholes to determine if there are <br />any problems during cleaning. Every dead-end manhole will be flushed during regularly <br />scheduled sewer line maintenance. Flushing will occur from every downstream manhole. <br />However, two manholes will need to be flushed through due to the manholes being <br />buried. These two manholes are MH #6 & MH #28. Additionally, MH #40 & MH #50 are <br />not accessible. These pipes will need to be back flushed.