10-10-2007 Council Agenda - Laserfiche WebLink

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The proposed tower for modeling purposes was located on the south end of the Capital View school property on top of the hill to provide for the most benefit to the area with the lowest tower costs. As the table outlines, the water tower option would provide an additional increase in the static pressure of approximately 2 psi for the areas in direct vicinity to the new tower and the additional increase in fire flows are highly dependent on the water elevation in tower. Recommendation It is our recommendation that the City complete a 12" trunk watermain loop starting at the 12" main on the east side of the railroad tracks run west along County Road B2 down through the St. Jude Property and back to the east along Viking Drive to the 12" main at the railroad tracks. In addition, a 12" watermain extension to Rice Street should be completed along County Road B2 or possibly through the south side of the Capital View school property and a connection to the existing 6" watermain on Stephanie Court should also be completed to improve the existing water system in that area. There are some additional benefits that would be seen by spending an additional $600,000. The benefits include a second storage structure for times of maintenance on the existing tower and slight increases in system pressures and fire flows in the southwest corner of the City. However, we do not feel that the limited benefits compared to the increased cost are cost effective at this time. The 12" trunk loop will provide adequate flows for the new St. Jude facility and improve the water system, especially the fire flows, in the entire southwest area based on current uses. There are some larger parcels of property in the area that may some day develop and put higher demands on the water system in the area. If that occurs the water system will need to be reviewed again and it is possible that a tower will be necessary in the southwest corner of town in the future. The trunk mains that are currently being recommended would be the framework necessary to serve the tower at that time if it is ever needed. If you have any questions please call me at (763) 780 -0450 extension 13. 10062 Flanders Court NE — Blaine, MN 55449 — Ph: (763) 780 -0450 Fax (763) 780 -0452 Mama - 700407 -CC (City Water System Improvements) 3