High System Water Tank

The City of Spokane has determined the need to add a water tank in Spokane’s South Hill High System pressure zone. The additional tank will benefit system operations and reliability for the water system serving both the mid and upper South Hill neighborhoods.

Location Requirements

Water tank locations must meet the following specifications:

  • Location must be a minimum of one and ideally two acres
  • Location should be relatively flat
  • Location must be at an acceptable elevation (ideally 2380 or above)
  • Location should be near the center of the pressure zone
  • Location should be located within six blocks of a transmission main, and ideally closer
  • Top of tank must match the tops level of the other South Hill tanks

Tank Design Requirements

Water tank design must meet the following specifications:

  • 100' in height (height requirements varies by location)
  • 100' in diameter
  • 50'-60' diameter base
  • 2 million gallon capacity

Why Hamblen Park? What Other Locations Were Considered?

The City located 11 sites that met the minimum site requirements listed under Location Requirements. A list of those sites along with the selection criteria for each site can be viewed online. While it is not necessary to meeting all site selection criteria, costs increase for each criteria which is not met. That is, the more site selection criteria which are met, the less costs that will be incurred by the City's water rate payers.

After evaluating numerous locations in the South Hill/Lincoln Heights pressure zone, the City has determined that Hamblen Park provides a location that meets all of the required specifications with the least amount of impact on nearby homeowners.

Additionally, the City Parks Department is assessing a potential Parks Department/Public Works partnership that would mitigate the construction of the water tank with improvements to parks in the area. This would be a unique opportunity to leverage non-Parks monies for park improvements, which would maximize citizen benefits while minimizing the total cost of the improvement.

Examples of Existing Parks Department/Public Works Partnerships:

  • CSO 24 (1st and Adams)
  • CSO 26 (Across from downtown library)
  • CSO 6 and 7 - Downriver Golf Course
  • Liberty Park
  • Underhill Park



Related Documents

Ask a Question or Leave Feedback

Email your questions or comments to highsystemtank@spokanecity.org.

To review the list of answers to frequently asked questions, see South Hill/Lincoln Heights Water Tank FAQs (PDF 611 KB).

Project Survey

Thank you for taking the time to read about the project and provide us with your feedback.

You can view the survey results now. (PDF 1.2 MB)