City of Roslyn Transmission Water Main

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PROJECT NARRATIVE 1. Project Description: Describe the scope of work. Indicate the major work involved, including a brief comparison of existing and proposed conditions. This project will prepare the necessary plans, specifications, and estimates for construction of 5,600 liner feet of 12" ductile iron water transmission main, valves, and appurtences. The current water transmission main is over 100 years old, has served it's useful life and is currently operating with multiple unrepairable leaks and unoperable isolation valves. Recurring maintenance has occurred on the system, but repair parts are unavailable due to the age of the system. 2. Explain the specific Infrastructure issues the project addresses and how they are linked to economic development improvements. The City is supplied via a transmission main from the Domerie Creek intake to the WTP. The transmission main is over 5 miles long and much of the piping is around 100 years old and is at the end of its useful life. The transmission main has experienced numerous breaks and leaks and is a major operational and maintenance concern for the City. This project ensures a reliable water supply to support ongoing economic development activites for a desirable tourist destination. When large leaks occurr, massive water system shut -downs occur, leaving the businesses with significant risk of temporary closures. 3. Preliminary Engineering Phase: Estimated Start Date: Estimated End Date: Completed Please explain phase status (work already completed, in progress, awaiting funding, etc., and factors that may slow phase progress). In June of 2014, the City of Roslyn completed it's required Water System Comprehensive Plan in accordance with WAC 246-290. Included in the approved plan was identification of Capital Improvements, of which the Transmission Improvement Project was identified as a primary need. Included in the identification were planning level cost estimates and general project parameters. This project moves this from a planning level to a complete biddable project with construction expected to occurr in the summer of 2019. 4. Right of Way Phase: N/A Estimated Start Date: Is It Required? Estimated End Date: Yes No Please explain phase status (work already completed, in progress, awaiting funding, etc., and factors that may slow phase progress). This City owns an easement on which the new project will be constructed.