Regional Water System
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Wylie Water Treatment Plants I, II, III, and IV (I-IV) Filter Media Improvements - Request for Authorization to allow use of Alternate Project Delivery Method; Project No. 101-0615-22; Resolution No. 24-47
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SUBJECT
recommendation
Authorize the use of Construction Manager At-Risk (CMAR) project delivery method for the Wylie Water Treatment Plants (WTPs) I-IV Filter Improvements project.
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PURPOSE
CMAR project delivery provides a distinct advantage of early identification and procurement of major construction materials and equipment that have traditional long lead times for configuration approvals, fabrication, and delivery to the project site. Such items specific to this project includes filter underdrain blocks and replacement media for the filters. The CMAR delivery approach allows the procurement process to progress concurrently with the detailed design, which helps compress the project’s schedule. Use of CMAR minimizes impact on operational requirements by right sizing planned work to limit impact on production at different times of the year. The CMAR delivery method provides the best value to the NTMWD.
RECOMMENDATION
The Executive Director and NTMWD staff recommend the Board of Directors adopt Resolution No. 24-47, A Resolution authorizing the use of this alternative delivery approach in accordance with Texas Government Code Chapter 2269, Contracting and Delivery Procedures for Construction Projects. The Construction Manager at Risk delivery method will provide the best value to NTMWD.
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Consultant: |
N/A |
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Scope: |
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Project: |
No. 101-0615-22, Wylie Water Treatment Plants (WTPs) I, II, III, and IV (I-IV) Filter Media Improvements |
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Amount: |
N/A |
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Committee: |
This will be an item on the November 20, 2024, Water Committee meeting agenda |
DRIVER(S) FOR THIS PROJECT
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Strategic Objective: |
1.1 High Quality Services |
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☒ Regulatory Compliance |
☒ Asset Condition |
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☐ Capacity |
☐ Redundancy/Resiliency |
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☐ Relocation or External Requests |
☒ Operational Efficiency |
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☐ Safety |
☐ Administrative |
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☐ Policy |
☐ Other _____________ |
BACKGROUND
The existing anthracite/sand media in the filters has been maintained and periodically replaced in accordance with the grain size specifications . The media will naturally break down with use, resulting in an evolving particle size distribution that may not be optimal for the intended service.
A recent filter pilot study was conducted for over a year to measure and evaluate the potential performance characteristics of various target media profiles. The final results and recommendations of this study are expected to be completed in the near future.
During the construction phases of this project, the Contractors will install the optimally sized media where needed and will further evaluate various other improvements, which may include underdrain replacement, installation of media retention caps on new and existing underdrain blocks, filter wall coating, structural modifications due to existing deficiencies, installation of manways for underdrain access for inspection, and valve replacement.
PROJECT PURPOSE
• In December 2022, the Board approved Administrative Memorandum No. 5880 authorizing a preliminary engineering study for the Wylie WTPs I-IV Filter Media Improvements project. Preliminary engineering analysis is nearing completion, and the final design will begin afterward.
PROJECT COMPONENTS
• This action seeks the Board’s authorization for the use of the alternative delivery approach for this project.
• Future recommendations for final design services for this improvement project will be presented at a later date.
• Future actions dealing with selection of a CMAR and Authorization of CMAR Preconstruction and Procurement Services will be presented at a later time. Other subsequent recommendations dealing with construction Work Packages will also be brought to the Board for consideration at a later time.
FUNDING
None is required at this time.