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Memo , Infrastructure Maintcnance Schedules and Equipment Usage Discussion 3 . WATER SYSTEM Equipmetlt Staff is currently developing a Water Line Valves and Gate Valve Map guide, similar to the Lift Station and Sanitary Manhole Map. The completion date is scheduled for April 29, 2005, Staff expects this guide to be equally effective. Gate valves are located on the water mains, they act as 'a Gate' to open or close the water supply to that particular segment of line, They are used to isolate a water break so that repairs can be made. Staff will use tl1e Vactor on emergency repairs to vacuum out the water at the bottom of the repair hole so that Staff can make the necessary repairs. The City Engineer explained to the March 14, 2005 memorandum regarding infrastructure assessment and rehabilitation, that the tools and technology needed to monitor the condition of the water system have not been developed to the extent as they have been for the sanitary sewer system. Because of this limitation to effectively monitor the condition of the water system, staff has taken the following steps to ensure that the residents of Arden Hills are served by a safc and functioning water system, . Staff has the water tested monthly at ten different locations thorough out the City by an . independent agency. Those locations are: Shell Gas Station, Blue Fox Restaurant, Guidant, Children's World, Booster Station, City Hall, Grainger, MVHS, Valentine Elementary and Presbyterian Homes, · Staff monitors the water levels and pressure of the North and South Water Towers on a daily basis. . Staff flushes the water mains, City wide, once per year. This is accomplished by opening up a fire hydrant and letting the water run until clear water comes out. · Staff will 'exercise' (open/close) the gate valves throughout the City, · The City installed three new Mag Meters in the water pits that accept water from the City of Roseville. These meters provide an accurate read of the water that was used as well as what was returned to the City of Roseville. In addition, the mcters provide a better conduit for the water to flow thorough, · Staff inspects the water towers on a monthly basis and has a professional inspection conducted every ten years, . Staff keeps a record of water breaks. The breaks are marked on a City map and a written record is kept on file as well. This documentation allows staff to monitor whcrc future work might be needed. These records are sent to the City Engineer to assist in long range planning, .