Water Reservoir

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The City of Tigard will design and construct a new 3-million-gallon water reservoir. This will ensure enough healthy, safe water to:

  • Keep pace with the city’s growth
  • Meet peak demand periods
  • Navigate emergencies and natural disasters

The final location of the reservoir (Reservoir 18) is not yet determined. There are two sites being considered for construction: Sunrise Park and Cach Nature Park. These sites are both owned by the city and are at elevations suitable for constructing the new reservoir.

To meet the city’s Strategic Plan goal to set the standard for excellence in public service and customer experience, the following project goals have been identified:

  • Provide resilience and add flexibility to the water supply system.
  • Manage for a transparent and smooth construction process with respect to impact on neighbors, permitting, safety, and cost.
  • Provide good communication to build relationships within the community.
  • Accelerate the schedule to mitigate neighborhood impacts and address existing system deficiencies.

What’s Next

  • The city will hire a design-build team to construct a 3-million-gallon water reservoir.
  • Technical analysis will determine the ultimate location of the reservoir, either at Cach Nature Park or Sunrise Park.
  • Construction is expected to begin in the summer of 2022.
  • Community outreach and engagement throughout the project.

The City of Tigard will design and construct a new 3-million-gallon water reservoir. This will ensure enough healthy, safe water to:

  • Keep pace with the city’s growth
  • Meet peak demand periods
  • Navigate emergencies and natural disasters

The final location of the reservoir (Reservoir 18) is not yet determined. There are two sites being considered for construction: Sunrise Park and Cach Nature Park. These sites are both owned by the city and are at elevations suitable for constructing the new reservoir.

To meet the city’s Strategic Plan goal to set the standard for excellence in public service and customer experience, the following project goals have been identified:

  • Provide resilience and add flexibility to the water supply system.
  • Manage for a transparent and smooth construction process with respect to impact on neighbors, permitting, safety, and cost.
  • Provide good communication to build relationships within the community.
  • Accelerate the schedule to mitigate neighborhood impacts and address existing system deficiencies.

What’s Next

  • The city will hire a design-build team to construct a 3-million-gallon water reservoir.
  • Technical analysis will determine the ultimate location of the reservoir, either at Cach Nature Park or Sunrise Park.
  • Construction is expected to begin in the summer of 2022.
  • Community outreach and engagement throughout the project.
  • Neighborhood Notice: Onsite Wetlands Review

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    Beginning the week of May 24, the City of Tigard's contractor (Pacific Habitat Services) will be onsite to conduct an environmental review. This work is part of a project to build a new water reservoir on the west side of Bull Mountain.

    What you can expect through June 4, 2021

    • Contractors visiting the area during daylight hours.
    • Vehicles parked along Sunrise Lane.


    What the contractors will be doing:

    • Confirming the location and size of wetlands onsite.
      • Contractors will collect data and leave flagging to delineate the boundary of two suspected wetland areas.
      • A map of the boundary and data collected will be submitted in a Report to the Oregon Department of State Lands and the US Army Corps of Engineers to confirm whether or not they will regulate the wetland areas.
    • The timeline for this data collection is approximately one week but the review by agencies could take several months.
    • This work will inform the project schedule and provide a better understanding of which agencies and permitting requirements will apply to siting of the reservoir.


    What's Next

    • The city will hire a design-build team to construct a 3-million-gallon water reservoir.
    • Technical analysis will determine the ultimate location of the reservoir, either adjacent to Cach Nature Park or at Sunrise Park.
    • Construction is expected to begin in the summer of 2022.
    • Community engagement: visit engage.tigard-or.gov/reservoir for project updates and to sign up for engagement opportunities.
  • There When You Need It

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    Christine Hollenbeck of the Regional Water Providers Consortium talks about the steps it takes for water providers to bring drinking water to homes and businesses throughout the region. The theme of Drinking Water Week 2021 is "There when you need it", and your water provider is working 24/7/365 to make sure that your drinking water is safe and reliable.


  • Neighborhood Notice: Water Reservoir Onsite Review

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    Beginning the week of March 1, the City of Tigard will be hosting potential contractor meetings onsite at Cach Nature Park and Sunrise Park. This work is part of a project to build a new water reservoir on the west side of Bull Mountain.

    What you can expect through June 4, 2021:

    • Contractors and engineers visiting Sunrise Park and Cach Nature Park during daylight hours.
    • Vehicles parked along Sunrise Lane.

    What the contractors and engineers will be doing:

    • Walking around Cach Nature Park and Sunrise Park to better understand existing conditions and to become familiar with each site.
    • This information will be useful to teams as they prepare to submit bids to the city for design and construction of the new reservoir.

    What’s Next

    • The city will hire a design-build team to construct a 3-million-gallon water reservoir.
    • Technical analysis will determine the ultimate location of the reservoir, either at Cach Nature Park or Sunrise Park.
    • Construction is expected to begin in the summer of 2022.
    • Community engagement: visit engage.tigard-or.gov/reservoir for project updates and to sign up for engagement opportunities.
  • Take a Tour: Inside Tigard's Water Storage Facilities

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    This virtual tour was created as part of the city's Water Master Plan. Go behind the scenes at some of Tigard's water storage facilities.

    Reservoir 1 and Aquifer Storage and Recovery (ASR) 1 Facility

    Reservoir 16 and Aquifer Storage and Recovery (ASR) 3 Facility

    10 MG Reservoir and Aquifer Storage and Recovery 2 Facility


    Learn more about about planning for our water future

    The purpose of the 2020 Water System Master Plan is to improve the level of service to customers by reviewing performance criteria, resiliency and reliability, and prioritizing needs identified within the 20-year planning period. The water system master plan:

    • Summarizes components of the existing water distribution system;
    • Analyzes water demand patterns within the service area;
    • Evaluates the performance of the water system with respect to critical service standards; and
    • Identifies and prioritizes the improvements necessary to remedy system deficiencies and accommodate future growth.

    Based on this analysis, the 2020 Water System Master Plan provides recommendations for specific projects for inclusion in the water utility Capital Improvement Program (CIP). These projects ensure that the water system continues to provide safe and reliable service to the Tigard Water Service Area.


Page last updated: 12 April 2021, 10:37