Item Report

City of Tolleson — City Council (2026-01-27)

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Item Number: H.5. 
 
 
CITY COUNCIL REPORT 
 
SUBJECT: 
Third Amendment to Cooperative Purchasing Agreement with West Yost & Associates, 
Inc. for SCADA Program Management and Implementation Services 
MEETING DATE: 
January 27, 2026 
 
TO: 
Mayor and Council 
FROM: 
Jamie McCracken, Utilities Director  
REVIEWED: 
Reyes Medrano, Jr., City Manager 
 
PURPOSE: 
The Utilities Department is requesting approval of the Third Amendment to the Cooperative Purchasing 
Agreement between the City of Tolleson and West Yost & Associates, Inc. to increase the annual compensation 
for program management and implementation services related to operationalizing the City’s Supervisory 
Control and Data Acquisition (“SCADA”) Master Plan. 
 
BACKGROUND: 
On July 10, 2024, the City entered into a Cooperative Purchasing Agreement with West Yost & Associates, Inc., 
based on a City of Tempe cooperative contract, for program management and implementation services to 
support the City’s Supervisory Control and Data Acquisition (“SCADA”) Master Plan. SCADA systems are used to 
monitor and control water and wastewater infrastructure, including treatment facilities, pump stations, and 
other critical assets, allowing Utilities staff to operate systems efficiently, reliably, and safely. 
 
As project needs have evolved, the City has determined that additional services are required to continue 
progress on SCADA-related initiatives. 
 
DISCUSSION: 
The Third Amendment increases the annual aggregate compensation from $200,000 to $350,000 per fiscal year 
to accommodate the additional scope of services needed to support the Utilities Department’s ongoing SCADA 
program efforts. These services include program management, coordination, and implementation support for 
SCADA system upgrades and operational improvements. 
 
All other terms and conditions of the original Agreement remain unchanged. The Agreement will remain in 
effect through April 20, 2027, unless otherwise terminated in accordance with its terms. The Third Amendment 
to the Cooperative Purchasing Agreement with West Yost will allow the consultant to perform a comprehensive 
assessment of the City’s water and wastewater operational systems to identify potential vulnerabilities. As an 
information technology and systems integration firm specializing in the “brains” of water and wastewater 
operations, West Yost will evaluate existing control, monitoring, and data management systems and provide 
recommendations to enhance system reliability, cybersecurity, and operational resilience. These services will 
support the City’s ongoing efforts to protect critical infrastructure and ensure the safe and efficient operation 
of its water and wastewater facilities.

BUDGET IMPACT: 
Funding for the increased compensation is included in the Utilities Department’s adopted budget. The 
Amendment establishes a not-to-exceed annual amount of $350,000 per fiscal year for services, subject to 
budget appropriation. 
 
RECOMMENDATION: 
Staff recommends approval of the Third Amendment to the Cooperative Purchasing Agreement between the 
City of Tolleson and West Yost & Associates, Inc., and authorization for the City Manager to execute the 
Amendment. 
 
ATTACHMENTS: 
1. 
01 27 26 UT - Third Amendment to CPA - West Yost & Associates, Inc. - End Date 04 20 27