Santan Vista Water Treatment Plant Phase I and II

  • Client:

    Town of Gilbert

  • Delivery Method:


  • Year Completed:

    Phase 1: 2009; Phase 2: 2018

Features & Highlights

  • Sand ballasted flocculation used to reduce the plant footprint for future capacity on-site
  • Included ozone generation system and sodium hypochlorite generation system
  • Sundt provided plant operations services during the initial phase.
  • Project completed two months ahead of schedule and under budget
Project Overview

Sundt constructed Phase I of this surface water treatment plant with an initial 24 MGD of capacity on a greenfield site and then constructed a second 24 MGD treatment train to take the total production capacity to 48 MGD.

To meet Gilbert’s CIP budget, the team had to identify value engineering and constructability savings to keep the project within the budget. The project team identified $17M in potential savings based on the 30% estimate. The City approved approximately $13M in VE savings, meeting the necessary budget. All proceeds were returned to the Owner. Based on the team’s understanding of the mechanical systems, we were able to develop a new layout for the dewatering facility to eliminate the need for a new belt filter press by relocating an existing filter press, saving $544,332.

This WTP contains:

  • Anthracite deep-bed monomedia filtration
  • Ballasted flocculation
  • Ozone generation, treatment, and basins
  • Sodium Hypochlorite generation
  • Pre-Treatment CO2 injection pH Adjustment
  • Raw water control facility
  • Retention basins
  • Finished water, backwash, and retention pump stations
  • Raw water pipeline
  • Finished water reservoir
  • Filter effluent mixing chamber
  • Recovered water equalization basins
  • Solids thickening and sludge pump stations and drying beds
  • Chemical feed facility
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“Sundt demonstrated their commitment to the success of this project by constantly being proactive in looking at different options and alternatives that would benefit the client. Sundt was always responsive to our requests and worked hard to hit important project deadlines.”

Kurtis McDavid, Plant Supervisor, Town of Gilbert


Awards & Accolades

2018 Water Treatment Plant Project of the Year, Arizona Water Association

2018 Top Project Award, Water and Wastes Digest and Industrial Water and Wastes Digest

2009 Project of the Year, Environment, American Public Works Association, Arizona Chapter

2009 America’s Crown Community Award, American City & County Magazine