Olalla Water System
Engineering Projects and Reports

2021 Continuing Water Main Replacement

As part of the continuing upgrades to the Olalla Water System, the RDOS is completing a design to replace the last sections of original water main, which will complete our rehabilitation of the distribution system. The last sections of water main requiring replacement are the laterals which provide water to the homes on 2nd street to 8th street.

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Olalla WS Map Legend  

The replacement main will be constructed in the same location and water services will be renewed as a part of the scope of work. The RDOS will work with consultants and contractors to minimize the disruption to residents during construction.

Header Replacement Work
The header for the water system is a piece of metal water main located in the pump house used to install instruments for water operations and monitoring. The existing header is made out of ductile iron and coming to the end of its lifespan, the header has also started to show signs of wear due to its age. The header is an important component of the water system and any issues or leaks with the header would put the system completely out of commission until it was repaired.

In order to replace the header the Regional District has contracted an experience metal shop to fabricate a 1:1 replacement of the using stainless steel instead of ductile iron, which is a longer lasting and more resilient material less susceptible to corrosion. The replacement project should not result in a disruption to water services, but residents will be informed when works are taking place and will be asked to keep extra water on hand just in case there are issues that arise during the installation.

The installation of the new header is expected to take place in late spring 2021.

Olalla Header Design

Existing Header 


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Water System Upgrades Starting in 2015 to 2020

A large part of the Olalla Water System was upgraded in 1998/1999 which included construction of a new well with pump, a concrete reservoir, a pump house complete with electrical controls and various watermain replacements.

The remaining older watermains will now be upgraded to further the efforts of reducing leakage within the Olalla Water System.

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reservoir downside Olalla

In September of 2015 the Regional District initiated various watermain upgrades to the Olalla Water System.  The construction of the watermains is being completed in Phases.  Phase 1 of the replacement project occurred in 2016 and Phase 2 was completed in 2017.

Phase 3 was initiated in 2020. This phase will develop designs for all remaining old and leaking mains. 

The other upgrade for the Olalla Water System was the communication system. There were frequent issues with the current system causing RDOS operations staff to spend valuable time with false alarms and troubleshooting.  In 2016, the Regional District upgraded the communications system and installed transfer switch to allow for a portable generator connection in the case of a power outage ensuring delivery of water to the Olalla system users.

A permanent pump station back-up generator was installed in 2020. Designs were completed in order to facilitate the replacement of remaining old watermains in need of replacement because of water leakage. We will be looking for a future grant in order to fund the replacement.
The Regional District continues to strive to develop an environmentally sustainable community and meet public needs through the development and implementation of key services.

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Planned work for 2020 also includes design of the remaining old watermain still in need of replacement in preparation for a future infrastructure grant opportunity.

The Regional District continues to strive to develop an environmentally sustainable community and meet public needs through the development and implementation of key services.