HomeMy WebLinkAbout11,Pipeline Rehab Project Approval
Action Item # 11 July 18, 2012 2012 Pipeline Rehabilitation ProjectApproval of the
Approval of the 2012 2 installation of new pipe by open cut methodsHistorically, pipeline replacement projects have involved the •and require replacementOver time, water system pipelines
exceed their useful life •Background / History Pipeline Rehabilitation Project
Approval of the 2012 3 constructionService laterals and meter boxes must still be replaced by open cut –inch diameter & larger)-Typically deal with mains (4–Number of different methods
by different manufacturers –methodsWater Department has been investigating pipe rehabilitation •New Information Pipeline Rehabilitation Project
Approval of the 2012 4 First project in California with the new lining system•Provided significant cost incentive to the District–Approached the District regarding a demonstration project
–useapplied lining system certified for potable water -Developed spray–as a future growth area3M Corporation has identified water pipeline rehabilitation •New Information Pipeline Rehabilitation
Project
Approval of the 2012 5 Traffic control and pavement restoration will not be required–Leak repairs on this pipe are problematic –crossing of a seasonal drainageOpen cut construction would
require significant tree removal and –Has sufficient hydraulic capacity–Minimal number of service connections –Davos Drive to Swiss Lane was selected:inch pipeline that crosses Tahoe
Donner Golf Course from -8•New Information Pipeline Rehabilitation Project
6
Approval of the 2012 7 Install lining–Clean and prepare the pipe for lining–Inspect the pipe by closed circuit TV (before & after lining)–3M will:•Communicate with property owners–Perform
pressure testing & disinfection–Perform excavation and backfill–District will:•District will function as project coordinator•New Information Pipeline Rehabilitation Project
Fiscal Impact Pipeline Rehabilitation ProjectApproval of the 2012 8 Current balance of about $3.46 million–Proposed funding source is Water Department Capital •Total cost estimated at
$35,000•District costs estimated at $20,000•Bid prices for open cut construction in 2010 were $45 to $80 per foot–670 feet of main = $22 foot–Price quoted by 3M is $15,000•
Recommendation Pipeline Rehabilitation ProjectApproval of the 2012 9 Department General Fund to cover the cost of the projectDepartment Capital Replacement Fund to the Water Authorize
the transfer of up to $35,000 from the Water •Authorize the General Manager to sign the contract with 3M•