Memorandum
City of Lawrence
Utilities Department
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TO: |
David L. Corliss – City Manager Cynthia Wagner - Assistant City Manager Diane Stoddard - 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 – Assistant Director of Utilities Beth Krishtalka – Assistant to Director Mark Hegeman – Utilities Operations Superintendent Dave King – Utilities Maintenance Superintendent |
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Date: |
December 12, 2012 |
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RE: |
Agenda Item – Set Bid Date for Bid Number B1302 Projects UT1201 – 2012 to 2015 Electrical Improvements Program and UT1202 - 2012 Mechanical Improvements Program Contract 1 and Authorize Purchase of Traveling Screen Rehab Parts from Siemens |
Please include the following item on the City Commission Agenda for consideration at the December 18, 2012 meeting:
Set Bid Date of January 29, 2013 for Bid Number B1302 Projects UT1201 – 2012 to 2015 Electrical Improvements Program and UT1202 - 2012 Mechanical Improvements Program Contract 1 and Authorize the Purchase of Traveling Sand Screen Rehab Parts from Siemens Industry Inc. in the Amount of $56,653.00.
Project Description
The current bid package covers the following water and wastewater facility major electrical and mechanical improvements from the Department of Utilities 2012 – 2015 Capital Improvements Plan.
Kaw Water Treatment Plant Low Service Pump Station 2 Improvements
The Kaw Water Treatment Plant Sand Screen is part of the raw water intake and Low Service Pump Station 2 pumping system at the Kaw WTP. The screen is installed to intercept debris ahead of the raw water pumps. The screen was installed in 1988 and due to the hostile service environment has reached the end of its reliable service life. The equipment was out of service on multiple occasions this summer due to drive system failures. During the process of repairs it was found that a number of direct replacement parts for the motor and gearbox system are no longer available. In March 2012 Staff coordinated an inspection of the Sand Screen by a representative of the manufacturer Siemens. Based on the inspection an aggressive rehabilitation of the equipment and replacement of worn parts is proposed while maintaining the existing structural frame. As part of the project the replacement of several raw water piping isolation valves, structural repairs to the concrete operating floor and replacement of deteriorated discharge pipe joint restraints will be performed.
Due to long lead times, 8 – 10 weeks, the desire to complete the work by Summer 2013, and the proprietary nature of the parts, Staff are recommending the City pre-purchase the parts required for the rehabilitation from the equipment manufacturer Siemens Industry Inc. as quoted. Staff and Black & Veatch have reviewed the quotes and believe they represent market value for the parts.
Clinton Water Treatment Plant 42” Filter Influent Pipe and Coupling Repair, and Master Backwash Valve Replacement
During the expansion of the Clinton Water Treatment Plant the interior of the 42” diameter filter influent pipe from the south basin train was found to be severely deteriorated at a chlorine feed point. Deterioration was also found at several downstream pipe joints. The corrective work was originally scheduled to be completed during the expansion however; water production needs required the plant to be put back in service prior to completing the work.
The Clinton WTP master backwash valve controls the flow of backwash water used to clean the filters. The valve modulates flow rate to ensure a complete backwash without upset of the filter media layers. The valves operation has become erratic and it often does not completely shut off flow. Maintenance staff have the valve and operator on hand and the project will provide for installation and startup of the valve and operator.
Kaw Water Treatment Plant Electrical Distribution Consolidation and Backup Generator Connection
The project involves the removal of the decommissioned 1975 incoming power substation and switchgear, the installation of a new transfer switch, generator connection, generator parking pad and the relocation of the existing generator. The 1975 equipment had exceeded its useful life and the switchgear had failed. Westar has removed their feed and transformers to this location. The Kaw WTP’s primary electrical feed will remain through the second Westar substation, transformer and switchgear which were upgraded in 2002.
The plant’s current electrical distribution system is disjoint and the location of the existing generator does not allow it to feed all potential treatment and building power demands. With this project all potential treatment and other building systems will be tied to the generator. The current generator is not large enough to power the entire plant demand, but the new generator connection and transfer switch will be sized to accommodate a larger generator in the future. In addition a number of previously abandoned electrical distribution circuits and breakers will be removed as safety measure.
Pump Stations PS4 Mechanical Modifications
The project includes the installation of a flow meter and emergency bypass pumping connection at Pump Station PS4. Pump Station 4 delivers all of the North Lawrence wastewater flow across the Kansas River to the Wastewater Treatment Plant. The addition of the flow meter will result in plant operations staff being unable to readily monitor and quantify flows as they are pumped toward the plant.
The project also includes the addition of an emergency bypass pumping connection at the pump station. In the event of loss of electrical service, or damage to the pumps and/or station electrical systems these connections allow flows to be pumped using a trailer mounted diesel powered pump. These connections are a standard design feature of Department pump stations constructed during the last seven years.
Project Status
Black & Veatch have completed the plans and contract bid documents for this phase, and the project is ready to advertise for bidding.
Project Schedule
Advertise for Bidding December 19, 2012
Bid Opening January 29, 2013
Kaw LSPS2 Completion May 1, 2013
Project Substantial Completion May 31, 2013
Final Completion July 3, 2013
Project Funding
The projects are included in the Department of Utilities 2012 Rate Plan and Capital Improvement Program.
Set Bid Date of January 29, 2013 for Bid Number B1302 Projects UT1201 – 2012 to 2015 Electrical Improvements Program and UT1202 - 2012 Mechanical Improvements Program Contract 1 and Authorize the Purchase of Traveling Screen Rehab Parts from Siemens Industry Inc. in the Amount of $56,653.00.
Thank you for your assistance. Please advise if you have any questions.