Title
Discussion regarding the Water Treatment Plant Expansion Alternatives Analysis.
Summary
The 2020 Water Master Plan was adopted by City Council on April 14, 2020 and outlines the necessity of expanding the City’s Surface Water Treatment Plant (WTP) from approximately 17 MGD to 30 MGD by 2022. In March 2020, the City retained Garver as the owner’s representative for the expansion of water treatment plant to assist the City with the successful delivery of the project. The services included an initial planning phase, in which Garver engaged with City Engineering and Operations staff to assess the suitability of the current treatment process technology, and performed a comparative analysis to determine the best path forward for the future expansion.
In accordance with their scope, a treatment alternatives evaluation for the plant expansion was performed prior to commencement of final design including the comparison of three filtration alternatives. In addition, a high-level alternatives analysis was included for the associated plant improvements necessary for expansion of the WTP to 30 MGD, including raw water pumping capacity, flocculation, sedimentation, disinfection, solids handling, high service pumping capacity, and SCADA improvements. As a component of the analysis, schematics depicting the proposed plant layout at full buildout for each of the filtration alternatives were developed, in order to demonstrate each alternative’s footprint at 75 MGD. Garver will provide a presentation summarizing their analysis and recommendations for the proposed treatment plant expansion per collaboration and direction from Staff.
In addition to the treatment alternatives evaluation, Garver provided an evaluation of water supply alternatives to keep pace with future demands. The 2020 Water Master Plan concluded that by 2029 the City will be required to have additional water sources online in order to meet anticipated demands. The attached technical memorandum expands upon...
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