Water Treatment Plant Upgrades

Water Treatment Plant Upgrades

Project Manager

Water Utilities Engineering |  Bill Millis, P.E.

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What We're Doing

The City of Stillwater and the Stillwater Utilities Authority will be upgrading and improving the various processes at the Water Treatment Plant (WTP). Nearly every treatment process will be improved or modified to provide a higher quality, more stable water for our customers. The processes included in the project are clarification, softening, recarbonation, filtration, disinfection and chemical feed systems. One of the larger chemical feed systems is Lime which is used to soften hard water. The existing lime feed system was installed in the 1980s and has long been showing signs of poor operation and recurring breakdowns. Due to the deterioration of the system and lack of ability to get replacement parts, the softening process must be replaced. In addition to the softening process improvements, replacement filters will be provided, various chemical feed systems will be upgraded to current standards, a new WTP generator will be installed and many other improvements will be made.

The work will be conducted in multiple phases in order to prioritize the efforts and keep the WTP in operation.

Benefits of the Project

New Lime Feed System - The Kaw Lake water flowing into the WTP has an average hardness that classifies it as moderate to hard water. A lime softening process is used to remove this hardness and reduce the potential for scaling inside the City's water lines and also inside our customer's plumbing. Customers may notice the benefits of a softer water because it reduces the amount of soap needed for washing laundry and bathing, leaves dishes shinier and cleaner and preserves the life of coffee makes, water heaters and other appliances that use water.

New Filters - The current filters were constructed with the original WTP in the early 1980s. The new filters planned for the WTP will provide deeper beds for superior filtration, improved backwashing and better cleaning of the filter media for an overall higher quality of treated water.

New Generator - A new generator for providing back-up power during an electrical outage will improve the reliability of the WTP.

Chlorine System Replacement - Similar to lime, the chlorine system is aging and deteriorating. WTP staff currently rely on outdated instruments for measurement and control. The chlorine system replacement will include new cylinder regulators, chlorine feeders and fine-turned measurements and controls.

Miscellaneous - Additional improvements are being made to various chemical feed system and processes.

Actions authorized by Stillwater Utilities Authority (SUA):

  • 1.9.17 | SUA-17-01 | Professional Services Agreement

  • 7.17.17 | SUA-17-22 | Amendment to Professional Services Agreement

  • 7.23.18  I  CC-18-90  I  Authorization to apply for an Oklahoma Department of Emergency Management (OEM) grant

  • 9.10.18 | SUA-18-34 | Request for Additional Expenditures and to Execute Contract Amendments to the Professional Services Agreement

  • 10.15.18  I  CC-18-118 I  Authorization to apply for an Oklahoma Department of Emergency Management (OEM) grant

  • 03.11.19  I  SUA-19-08 I  Request to Award Chlorine Scrubber Construction Quotes Package

  • 06.03.19  I  SUA-19-23 I  Acceptance of the Oklahoma Department of Emergency Management (OEM) grant

  • 06.03.19  I  CC-19-79 I  Acceptance of OEM grant for mobile BPS Generator

  • 06.24.19  I  CC-19-91 I  Acceptance of OEM grant for stationary WTP Generator

  • 11.18.19  I  SUA-19-39 I  Bid Recommendation to Award Generator Construction Project

  • 9.28.20  I  Presentation I  Stillwater Water Treatment Plant & Raw Water Supply Scenarios


view looking west over the water plant

Looking across the water treatment plant to the west

pumps and piping in the water plant's pump station