HomeMy WebLinkAbout7, Old Greenwood Well Rehab
ACTION ITEM #7 of Old Greenwood WellConstruction Contract for the Rehabilitation Consideration for Approval of a of Old Greenwood WellConstruction Contract for the Rehabilitation Consideration
for Approval of a February 6, 2019
Old Greenwood Well Rehabilitation Has been a reliable groundwater source for the past 13 years•approximately 900gpmHistorical groundwater production from this well has been •Well was
originally constructed in 2005•well located in the Old Greenwood subdivisionOld Greenwood Well is a 500hp, electric vertical turbine groundwater •BACKGROUND / HISTORY Old Greenwood
Well Rehabilitation
Old Greenwood Well Rehabilitation in amount not to exceed $75,000Manager to procure all of the necessary repair services and materials At the September 5, 2018 meeting the Board authorized
the General •inspectionStaff determined the well would require removal for complete •On August 30, 2018 the well experienced a mechanical failure•BACKGROUND / HISTORY Old Greenwood
Well Rehabilitation
NEW INFORMATION Provide District with summary report and recommendations•Conduct well video inspection•-Remove ~700’ of 12”x2•Remove 500hp electric motor•The scope of work included•for
the removal and inspection of Old Greenwood Well September, 2018 the District publicly advertised a request for quotes •Old Greenwood Well RehabilitationOld Greenwood Well Rehabilitation
NEW INFORMATION$11,400agreement with Carson Pump, Inc. for an amount not to exceed Following a review of quotes, the District entered into a service •services requestThe District received
two quotes for the inspection and repair •Old Greenwood Well RehabilitationOld Greenwood Well Rehabilitation
NEW INFORMATION Video inspection of the well column indicated no visible damage•maintenancedamage and can be returned to manufacture specifications with minor Inspection of the Flowserve
pump assembly revealed no signs of •destabilization of the pump shaft assemblyPump column pipe suffered significant damage as a result of the •due to catastrophic failure of the stabilizer
bushingsStainless steel pump shaft and couplings suffered significant damage •resulted in the following determinationsThorough inspection of the well pump assembly and column pipe •In
October 2018, Carson Pump, Inc. removed the well assembly•Old Greenwood Well RehabilitationOld Greenwood Well Rehabilitation
NEW INFORMATION submersible pump configuration Replacement of the complete pump and motor assembly with a •pump column pipe of 8” diameterReplacement of existing pump shaft assembly
with a reduced diameter •specificationsReplacement of existing pump shaft assembly and column pipe to same •followingStaff evaluated options for repair or replacement, including the
•Old Greenwood Well RehabilitationOld Greenwood Well Rehabilitation
NEW INFORMATION motor efficiencyReduction in pump discharge pipe diameter provides opportunity for •pipe and more accurately accommodate historical water productionModify well discharge
head to facilitate 8” diameter pump discharge •manufacturer specifications Service the existing Flowserve pump bowl assembly to ensure original •assembly and reduced diameter column
pipe of 8”Replacement of existing pump shaft assembly with a new pump shaft •be in the best interest of the Districtconstruction contractors and determined the following actions would
Staff consulted with pump manufactures, engineers and well •Old Greenwood Well RehabilitationOld Greenwood Well Rehabilitation
NEW INFORMATION$124,318YesSacramento, CAInc.Cal Pump and Well Drilling,-Nor$105,417YesChico, CACommercial Pump and Mechanical, Inc.$78,700NoNVCarson City,Carson Pump, Inc.Total Bid PriceResponsiveLoc
ationContractor point three bids were receivedOn January 25, 2019 the District held a public bid opening at which •Bids for the Old Greenwood Well Rehabilitation Project 2019On January
10, 2019 the District publicly advertised a Request for •Old Greenwood Well RehabilitationOld Greenwood Well Rehabilitation
NEW INFORMATION Pump and Mechanical, Inc. in the amount of $105,417Staff has determined the lowest responsive bidder to be Commercial •responsive-apparent low bidder was determined to
be nonstaff and District counsel, the received bids by Following review of all •Old Greenwood Well RehabilitationOld Greenwood Well Rehabilitation
FISCAL IMPACT FundsSufficient funds for the project exist in the Water Operating Reserve •the Board approved FY19 Water Utility Operations BudgetOld Greenwood Well Rehabilitation Project
2019 was not included in •Old Greenwood Well RehabilitationOld Greenwood Well Rehabilitation
RECOMMENDATION Rehabilitation Project 2019Fund to the Water General Fund for the Old Greenwood Well Authorize the transfer of $116,000 from the Water Operating Reserve 3.$116,00010%
change order authorization for a total not to exceed amount of Commercial Pump and Mechanical, Inc. in amount of $105,417 plus a Authorize the General Manager to execute a contract
with 2.id to Commercial Pump and Mechanical, Inc. baward the responsive and -Make a finding that Carson Pump, Inc. bid was non1.Old Greenwood Well RehabilitationOld Greenwood Well Rehabilitation