Memorandum
City of Lawrence
Utilities Department
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TO: |
David L. Corliss – City Manager Diane Stoddard – Assistant City Manager Casey Toomay – Assistant City Manager |
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FROM: |
Philip Ciesielski – Assistant Director of Utilities |
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CC: |
Dave Wagner – Director of Utilities Mike Lawless – Deputy Director of Utilities Beth Krishtalka – Assistant to Director Mark Hegeman – Utilities Operations Superintendent Dave King – Utilities Maintenance Superintendent Bob Brower – Utilities Operations Superintendent |
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DATE: |
September 10, 2014 |
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RE: |
Agenda Item – Project UT1102 Kaw Water Treatment Plant Raw Water Intake, Approve Change Order No.1 |
Background
The project provides for the construction of a redundant surface water intake and raw water pipeline to the Kaw Water Treatment Plant (WTP), and modifications to and dredging in the area of the active intake as recommended in the November 2012 Kaw Water Treatment Plant Raw Water Intake Evaluation by Black & Veatch. The construction of the new intake and raw water pipeline will provide a redundant point of raw water diversion from the Kansas River for the Kaw WTP. These facilities will also serve as the first phase of Kansas River raw water supply required for the potential expansion of the Kaw WTP to a treatment capacity of 25 MGD. The modifications to the existing intake involve raising the top to above the new water surface as impounded by Bowersock Dam, installing a sediment shield on the intake pipe to reduce the intake of sand into the pipe and Low Service Pump Station No.2, and dredging in the immediate area of the intake. Additionally the two (2) abandoned intakes and piping will be removed. See the attached map indicating the location of the work.
Project Status
During the December 17, 2013 meeting the City Commission awarded the construction contract to Wolf Construction in the amount of $3,800,000.
Change Order 1 to the construction contract includes:
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Work Change Directive No. 1 – Clarifications to Field Coating Requirements, Addition of Turbidity Curtain in Kansas River, and Changes to Butterfly Valve Stems |
($56,315.09) |
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Addition of Steel Plate to New Intake Nose |
$8,870.00 |
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Changes to Tie-In Locations and Configuration of the 24-inch Tie-in Due to Actual Existing Pipe Locations |
$24,505.21 |
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Abandon Former Manhole |
$7,120.00 |
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Remove and Reinstall 16-inch Pump Line |
$52,958.00 |
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Change Order No.1 Total |
$37,138.12 |
Due to weather delays and additional time associated with the work covered in Change Order No.1 the contract times are extended by 32 calendar days for Milestone 1 from May 15, 2014 to July 16, 2014; by 37 days each for Substantial Completion from June 15, 2014 to July 22, 2014 and Final Completion from July 1, 2014 to August 7, 2014. Note that as of this memo the contractor has not achieved any of the completion dates and is being assessed Liquidated Damages per the contract.
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Original Contract Amount |
$3,800,000.00 |
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Change Order No.1 |
$37,138.12 |
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New Contract Total |
$3,837,138.12 |
Change Order No.1 represents an increase of 0.97% of the original contract amount.
Project Funding
The project is included in the Department of Utilities 2013 Capital Improvements and Rate Plan and is identified in the proposed Bond Funds per Resolution 7019.
Action
Authorize the City Manager to execute Change Order No.1 to the existing Construction Contract with Wolf Construction for Project UT1102 Kaw Water Treatment Plant Raw Water Intake increasing the contract amount by $37,138.12 and extending Milestone 1 by 32 calendar days and extending Substantial and Final Completion each by 37 days.