CC - Agendas - City Council - REGULAR - 12/2/2014

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I•A• ('ITYor PREs(1Orrr _IT,40`�°:'f1;5""tO"^" COUNCIL AGENDA MEMO MEETING DATE/TYPES: COMBINED WORKSHOP AND 12-02-2014 REGULAR VOTING SESSION DEPARTMENT: Public Works AGENDA ITEM: Approval to perform night work for the Willow Creek 14-inch Water Main Line Stops and Valve Installations Project Approved By: Date: Director: Hash, Henry 11/14/2014 City Manager: McConnell, Craig Aa,A."7&614.4.A.LL II 2O /4. Item Summary (J Approval of this item will authorize night work for the purpose of completing water line stops (line freezing) and 14-inch water line valve installations for the Willow Creek Water Line Repair and Scour Protection Project. For the City to maintain water services for a significant portion of north Prescott, the water main will need to be frozen in two locations by a liquid nitrogen casing. The time to create the initial freeze plug ranges from 8-12 hours and the plug must be maintained through the entire valve installation project. The contractor needs to start the line freeze in the evening to allow for time required to complete the freezes prior to daytime work hours. The noise associated with the work will mainly be the idling vehicle. The closest residences to the work areas are 250 feet away. Upon approval of the request, the City Project Manager will mail a notification letter to all residences located within 1,000 feet of the line stop area, and will hand deliver notifications to the six residences that are within 500 feet. After the freeze plugs have been installed, the primary noise-generating work can be completed during daytime work hours. Background On October 14, 2014, Council approved a contract with Arizona Tap Master for Water Line Stops and 14-inch Water Line Valve installations for the Willow Creek Water Line Repair and Scour Protection Project. Once this work is completed, the overall water main replacement and scour protection project will be constructed. City Code Title 5-4-2: Specific Acts Prohibited, requires City Council approval for any night work between 8:00 PM and 6:00AM, Monday through Saturday.