SUBJECT: Resolution
Title
Resolution To Authorize A Change Order to the Water Treatment Facility Solids Handling Equipment and Building Project in the Amount of $665,602.00
Body
DEPARTMENT: Public Works
PRESENTER: Todd Fessenden, Public Works Director
Gary Behlen, Public Works Director
FISCAL INFORMATION:
Additional Cost as Recommended: $ 665,602
Balance Available: $ 728,000
Fund: Water
Budget Line Item Number: 500.70.110.605000.100229
New Appropriation Required: No
STAFF RECOMMENDATION:
Recommendation
Approve the Resolution to amendment of said contract, authorize the appropriate Town officer to execute said amendment, authorize Staff to expend contracted funds and contingency funds.
End
SUMMARY AND BACKGROUND OF SUBJECT MATTER:
At the November 15, 2016 Board Meeting, the construction phase of a design-build project was awarded to Fischer Construction, Inc., and JVA Consulting Engineers (FC/JVA), Inc. The construction phase of the Solids Handling Project is now almost complete and has come in under the Guaranteed Maximum Price (GMP) plus contingency funds. During this project a sewer line was installed along the southern and eastern sides of the finished water clearwell at the Lynn R. Morgan Water Treatment Facility (WTF). Upon installation of the sewer line unusual amounts of groundwater were encountered, which were suspected to be coming from a leak in the finished water clearwell. A contractor was mobilized to perform a dive inspection of the clearwell and two issues were found; a leaking pipe joint between the WTF and the 1.75 million gallon (MG) clearwell and disintegrating grout in the clearwell floor. These leaks need to be addressed quickly to avoid further damage and potential groundwater intrusion into the clearwell.
The 2017 water capital budget includes funds to design and construct clearwell improvements at the WTF. The first part of the planned improvements is to add baffles to increase chlorine contact time in the finished water clearwell. This will increase the rated treatment capacity and comply with new Colorado Department of Health and Environment (CDPHE) requirements related to disinfection. The second part of the improvements is to add metering to the Zone 2 discharge line from the clearwell. This location is currently unmetered and affects our ability to determine where losses may be occurring in the distribution system, and is in line with commitments in our state-approved 2014 Conservation Plan.
A change order to the contract with FC/JVA is requested for repairs and new water system improvements to be able to use the available contingency funds plus the additional funds already allocated in the 2017 water budget for these improvements.
Several significant benefits of proceeding now include:
• Contractor currently on site, no additional mobilization costs required.
o Current project is “open book”, we see actual costs of materials and contractor efforts;
• Colorado Department of Health and Environment (CDPHE) would approve additional work as a change to the existing state approved project, versus requiring a new site application and lengthy approval process.
• Fix the existing leak at the 1.75 million gallon clearwell as well install baffles to address chlorine contact time issues which we anticipate will be required by CDPHE in 2019.
• All improvements are part of planned capital improvement plan and require operationally disruptive draining of clearwells at the WTF.
Total Project Costs
Total Guaranteed Maximum Price + Contingency $ 3,711,400
Change Order for Repairs & Improvements $ 578,784
Contingency for Clearwell Repairs & Improvements (15%) $ 86,818
Total $ 4,377,002
If the Board of Trustees approves this Amendment to the Design Build Contract, staff will transfer funds from an existing 2017 Water Treatment Facility Improvements line to the Solids Handling Equipment and Building budget line.
Project Schedule
Amendment Approval October 10, 2017
Construction Complete Early 2018
ATTACHMENTS:
a. Vicinity and Location Map
b. Clearwell Baffle Diagrams
c. Contractor Proposals
d. Resolution