07-23-2014 Council Agenda - Laserfiche WebLink

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ItLURRK flss004111s Memo TO: Honorable Mayor & City Council Members FROM: Lee Elfering, City Engineer DATE: July 18, 2014 RE: Tower Valve Replacement & New Hydrant We are moving forward with the installation of the new valve on the Water Tower line. There were concerns with the number of bends that would be necessary to allow the installation of the 16" valve in the original proposed location. After review of the site with the Contractor in the field with all utility locates completed we modified the installation location. The new installation will be made just outside the Noel Drive curb line. No street removal is needed but a portion of the lower wall will be removed and reinstalled and a portion of the upper wall will also be removed. The second wall will not be reinstalled due to the fact that we are proposing to move the wall for the future sidewalk. The Public Works Director had previously emailed the Council on staffs desire to add the installation of a hydrant on the Water Tower line as part of the valve replacement work. The purpose of the hydrant would be for draining the tower as well as taking water samples from the tower before putting it back in service. Some type of drain option is standard on water towers today but was not back in 1977. We had the option of putting a 4" valve inside the tower that we could hook a hose up to in order to empty the tower when maintenance is needed. The price for the 4" valve was $7,095. The price for installing a fire hydrant is $6,330. Having the hydrant in that location will allow us to drain the tower without leaving anyone without water for a period of time. When we drained the tower in early -June we were forced to leave City Hall, the Watershed District, and 13 houses on Noel Drive without water for an hour or two. The hydrant will also allow us to take samples from the tower before putting it back in to service. The original valve installation cost was $24,550.00 and with the addition of the hydrant the total cost would have been $30,880.00. With the project savings accounted for due to the revision to the location of the valve and adding the hydrant installation the total cost for the work is $27,250. If you have any questions concerning this information, please call me at (763) 780-0450. 10062 Flanders Court NE — Blaine, MN 55449 — Ph: (763) 780-0450 Fax (763) 780-0452 Mem0.071814-CC (valve Replacement & Hydrant)