Memorandum
City of Lawrence
Utilities Department
|
TO: |
Diane Stoddard – Interim City Manager Casey Toomay – Assistant City Manager Brandon McGuire – Assistant to the City Manager |
|
CC: |
Dave Wagner – Director of Utilities Mike Lawless – Deputy Director of Utilities Beth Krishtalka – Assistant to Director |
|
FROM: |
Philip Ciesielski – Assistant Director of Utilities |
|
DATE: |
January 15, 2016 |
|
RE: |
Authorize the sole source purchase of two utility transformers from Kaw Valley Electric Cooperative in the amount of $42,768.42 for the Clinton Water Treatment Plant Raw Water Pump Station Improvements, Project No. UT1417.
|
Project Description
The existing Clinton Water Treatment Plant Raw Water Pump Station contains 4 pumps and associated electrical equipment to pump a firm capacity of 20 million gallons per day (MGD). The facility houses the pump and motor equipment, the electrical motor control center, switchgear, variable frequency drives (VFD) and other electrical equipment within the same space. The interior building environment is not currently controlled for heat, insects, dust and debris. Ventilation is provided via 2 large unfiltered sets of fans and intake louvers. The heat buildup within the structure, large number of insects and debris such as cottonwood seeds are detrimental to the long-term operation of the installed pump motors and electrical gear. This was particularly evident during the summer of 2011 when, due to continued interruptions in equipment service, staff constructed a temporary air-conditioned enclosure around portions of the electrical switchgear and VFDs to keep it from faulting out due to high internal building temperature. Continued high building temperatures contributed to the failure, and 2014 replacement, of the motor and VFD on pump no.4. With planned pumping capacity increases, and the installation of additional variable frequency pump drives the unconditioned space will become increasingly problematic for the reliable and efficient operation of the electrical equipment.
The current project will construct an addition to the existing building to house the VFD’s and other sensitive electrical equipment. This addition will be isolated from the existing unconditioned space and equipped with heating, and air-conditioning appropriate for the installed equipment. The project will also replace the existing 5 MGD pump no.2 with a 10 MGD pump/motor/VFD bringing the pump station to its design, firm capacity of 25 MGD; replace the existing VFDs on pumps no.1 & no.3; install a bypass on the existing VFD for pump no.4 and reinstall it in the new space; replacement of the existing 750 KVA incoming electrical service transformers with 1500 KVA transformers to meet the increased pumping capacity load requirements; replace the existing 36” diameter steel pump discharge piping; and reroof and fence the existing building.
Project Status
On October 6, 2015, the City Commission awarded the bid for construction to Crossland Heavy Contractors in the amount of $1,527,000.00.
As noted above the two existing 750 KVA utility transformers need to be replaced with 1500 KVA transformers to accommodate the increased pumping capacity electrical load requirements. These transformers are supplied by the electric utility, in this case Kaw Valley Electric Cooperative (KVE). KVE has provided a quote for the transformers in the amount of $21,384.21 each for a total of $42,768.42. As the electric utility customer, the Department of Utilities identified the direct purchase of the transformers as part of the project scope.
Project Schedule
Advertised for Bid August 26, 2015
Prebid Meeting September 8, 2015
Bid Opening September 22, 2015
Awarded Bid October 6, 2015
Project Completion November 2, 2016
Project Funding
The project is funded from the Department of Utilities Bonded Construction Fund per Resolutions 7062 & 7107.
Action
Authorize the sole source purchase of two utility transformers from Kaw Valley Electric Cooperative in the amount of $42,768.42 for the Clinton Water Treatment Plant Raw Water Pump Station Improvements, Project No. UT1417.