April 15, 2025
TO: City Council
REQUESTED BY: Mathew Osborn, Superintendent
APPROVED BY: Robert A. Johnson, City Manager
SUBJECT: Change Order for Grand Well Improvements (SCADA Upgrades) CIP RECOMMENDATION:
Staff recommends that the City Council:
. Appropriate additional funding in the amount of $124,117 from the Water Enterprise Fund's unrestricted net position for CIP 25-005, SCADA Replacement Program; and . Approve the supplemental purchase of the additional SCADA system components from RoviSys.
DISCUSSION:
On July 16, 2024, the City Council approved a $605,407 contract with RoviSys to replace the City’s outdated Supervisory Control and Data Acquisition (SCADA) system. This upgraded SCADA system—vital for monitoring and controlling the City’s water treatment and distribution operations—is currently being integrated into municipal facilities.
On November 19, 2024, the City Council authorized an additional $114,946 for similar work at the Bath Well Treatment Plant. Council approval is required to proceed with the same scope of work at the Grand Well Site.
Upon initiating communication between RoviSys and the Grand Well Treatment Plant design engineer, Civiltec, additional needs were identified for the system to function as intended.
Specifically, a new electrical sub-panel, updated wiring, and a Programmable Logic Controller (PLC) are required to fully operate the Grand Well Treatment Plant on the new SCADA controls.
The primary function of the new PLC will be to serve as the control center for the SCADA system at the Grand Well site. It will manage operations such as the starting and stopping of the Grand well, activation of booster pumps, regulation of treatment plant processes, and control of chlorine dosing pumps. Without the PLC and new panel, the SCADA system at the Grand Well Treatment Plant site will lack the necessary functionality, limiting the City's ability to manage one of its most essential water sites effectively.
The need for the additional panel and PLC components was not identified in the original scope for the Grand Well Treatment Plant construction project because it is specialized work requiring the expertise of the City’s SCADA programmer Rovisys to install and program.
RoviSys was selected for the SCADA replacement project through a competitive bidding process, offering a bid of $605,407, significantly lower than the next bid of $1,234,986 from Stellar Technology.
To fully operationalize the Grand Well Treatment Plant on the new SCADA system, City staff recommends proceeding with the purchase and installation of the necessary panel, wiring, and PLC components. These components are essential to ensure the Grand Well and Treatment Plant site achieves the required control capabilities under the updated SCADA system.
FISCAL IMPACT:
The supplemental purchase, totaling $124,117, will be funded through the Water Enterprise Fund's unrestricted net position, with no impact on the General Fund.
ATTACHMENTS:
Change Order for Grand Well SCADA (RoviSys)
Change Order Summary for Grand Well SCADA (RoviSys)