Regional Water System
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Wylie Water Treatment Plant Conversion to Biologically Active Filtration;
Project No. 101-0390-15; Additional Engineering Services
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SUBJECT
recommendation
Authorize additional engineering services to Carollo Engineers, Inc. in the amount of $1,021,900 to an existing Engineering Services Agreement (ESA) to address additional scope needed for plant conversion to Biologically Active Filtration (BAF).
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PURPOSE
Additional funding is needed to complete the final design phase of converting the Wylie Water Treatment Plants to BAF. The additional services are needed due to changes to the original concept with a goal to preserve clearwell storage volume and rerouting of piping to preserve space on the plant for future process needs. The addition of new scope to add chlorine dioxide to the Plant I and II reclaim stream to mitigate future high levels of manganese also added to the need for more engineering services.
RECOMMENDATION
The Executive Director and NTMWD staff recommend the Board of Directors authorize additional engineering services to an existing ESA as follows:
Consultant:
Carollo Engineers, Inc.
Scope:
Additional services for Final Engineering Design
Project:
No. 101-0390-15, Wylie Water Treatment Plant (WTP) Conversion to Biologically Active Filtration
Amount:
$1,021,900
Committee:
This will be an item on the January 22, 2025, Water Committee meeting agenda
DRIVER(S) FOR THIS PROJECT
Strategic Objective:
1.1 High Quality Services
? Regulatory Compliance
? Asset Condition
? Capacity
? Redundancy/Resiliency
? Relocation or External Requests
? Operational Efficiency
? Safety
? Administrative
? Policy
? Other _____________
BACKGROUND
The complex interconnectivity of the four Wylie Water Treatment Plants (WTPs) presents many possible process flow paths for the implementation of the Biologically Active Filtration (BAF) treatment process. Phase I of Preliminary Engineering was undertaken to de...
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