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RESERVOIR 11 CONSTRUCTION


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Project Tracker

Schedule

The entire construction will take about 18-20 months (depending on the weather). The best construction times, of course, are in the spring, summer and early fall. The plan is to begin the project in the spring of 2018 and complete construction by the end of fall 2019.

Reservoir 11 construction schedule

Project Summary

Sunrise Water Authority (Sunrise) is in the process of constructing a new 3 million gallon reservoir located just off SE Verlie St. and SE 147th Avenue in the city of Happy Valley. The construction site is the location of an existing reservoir and pump station owned and operated by Sunrise. The project is needed to increase operational storage to a large portion of the agency’s customers, while also improving service resiliency in the event of a major disaster, such as large regional earthquake.

Timely completion of the reservoir project will permit Sunrise to continue meeting the communities need for safe and reliable drinking water for years to come. It is Sunrise’s goal to complete the project in a manner that minimizes the impacts to the surrounding neighborhood while working with the community in response to their concerns.

The project is needed to increase operational storage to a large portion of the agency’s customers, while also improving service resiliency in the event of a major disaster, such as large regional earthquake.The project is needed to increase operational storage to a large portion of the agency’s customers, while also improving service resiliency in the event of a major disaster, such as large regional earthquake.

Reservoir construction will be executed in three main phases 

Reservoir construction

  • Earthwork excavation and slope stabilization
  • Building of the concrete reservoir
  • Backfilling and regrading the site

The earthwork excavation will require about 50,000 cubic yards of dirt and rock to be removed. Because the new reservoir will be largely buried into the existing landscape, the preparation will require the creation of a “hole” that is more than 50-feet deep along its north side. With this, the slopes will have to be stabilized with “engineered walls” and “anchors”, incorporating the latest in earthwork technology.

Once the “hole” is created, the construction of the concrete reservoir begins with the pouring and curing of the floor, followed by the walls, and then the roof. The cylindrical concrete structure is more than 150-feet in diameter and nearly 35-feet tall. Once the structure is in place, it is wired-wrapped with tensioned steel cables to make the structure water-tight. The cabling is then covered with ‘shot-crete’ and sealed into its final form.

Once the reservoir is cured, the site will be restored to its final grade. To do this, dirt is brought back to the site with the goal to partially bury the reservoir to its roof line along the north, while tying into to the existing grade of the adjacent reservoir to the south. Once regrading is complete, landscaping and site restoration will be completed.

Neighborhood Impacts and Issues:

We recognize that this project will impact the surrounding community. Early in the process a Good Neighbor Plan, was developed in response to neighborhood concerns.  A community meeting for area residents was held November 2, 2017, to share information about the project and to collect feedback from the people who will be living with the project in their midst.  Information provided to the community at that meeting included (some items take a while to load):

Contact Information

For more information about the Reservoir 11 construction project or to get questions answered contact:

Kim Anderson, Government Relations Manager
Sunrise Water Authority
503.761.0220
kanderson@sunrisewater.com

Join Email List

To join the email list to receive project updates contact us at reservoir11@sunrisewater.com.


Last updated: 4/9/2018 4:41:33 PM