Memorandum
City of Lawrence
Utilities Department
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TO: |
David Corliss Debbie Van Saun |
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FROM: |
Philip Ciesielski |
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CC: |
Chris Stewart |
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Date: |
November 21, 2006 |
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RE: |
November 28, 2006 Agenda Item |
Please include the following item on the City Commission consent agenda for consideration at the November 28, 2006 meeting:
Kaw Water Supply Low Service Pump Station No. 2 Improvements – Supplemental Agreement for Design and Construction Phase Engineering Services:
Project Description
The 2003 Master Plan identifies several projects for the Kaw Water Treatment Plant. The projects require improvements to the water supply facilities (intake system and pumping units) as well as transmission lines leaving the water treatment plant. The first phase of the engineering work will include a Preliminary Design report that will identify project improvements to the water supply system (review intake crib, parallel siphon, pumping station, groundwater alternatives) and transmission line improvements. The engineering services will consider several alternatives for the water supply improvements; routing of a transmission main in the water distribution system; and a construction phasing sequence to coincide with financing requirements outlined in the Master Plan. These Preliminary Design services were authorized during the January 24, 2006 City Commission meeting.
Project Status
Burns & McDonnell has completed the preliminary design work related to the Kaw Water Treatment Plant Low Service Pump Station No.2 improvements. This part of the preliminary design considered needed improvements to increase the firm pumping capacity of the raw water supply to 17.5 mgd at low river elevations (the rated capacity of the treatment plant). The current firm pumping capacity at low river conditions is 15.0 MGD. Burns & McDonnell has recommended pump and electrical equipment replacement that will increase the firm capacity and reliability of the Kaw WTP raw water supply from the Kansas River. Staff have reviewed the report and its recommendations and have negotiated a supplemental services agreement for design and construction phase engineering services for the project in the amount of $145,043.00. The current opinion of probable cost for the construction of the recommended improvements is $562,300.00.
Project Details
A general summary of the project work scope is provided below:
The 2003 Water Master Plan includes improvements for the water supply that serves the Kaw Water Treatment Plant. The plan provides general information indicating that the firm capacity of the existing raw water facilities require upgrading to meet the overall capacity of the existing water treatment plant during low water conditions in the Kansas River. Improvements to the 30 inch parallel siphon; intake crib system; review of well water supply potential; and pumping capacity will be evaluated within the scope of services.
The current scope of engineering and construction phase services includes the preparation of plans and technical specifications for the procurement of new pumps, motors and drive units; and the preparation of plans and technical specifications for the installation of the pumping units and modifications to the existing electrical and ventilation systems. Also included are bid and construction phase engineering services.
At this time the evaluation of the 30” raw water siphon and additional water supply options are on going.
Project Funding:
Funding for the design and construction phase engineering work will come from the non-bonded construction fund for 2006. The 2007 construction phase fund will be funded from a recent bond sale completed by the Finance Department. The current opinion of probable construction cost for the improvements is $562,300.00.
Action Request: Utility Department staff requests approval from the City Commission to authorize the City Manager to enter into a supplemental agreement to the existing engineering contract with Burns and McDonnell in the amount of $145,043.00 for design and construction phase engineering services associated with pumping improvements to Low Service Pump Station No. 2 as recommended by Department staff.
Thank you for your assistance. Please advise if you have any questions.