Project Area
This map illustrates the project boundary for the AWWD Water Pressure Reduction Phase 2 project.
Project Overview
The Alderwood Water & Wastewater District (AWWD) is beginning the second phase of the Water Pressure Reduction project in the Canyon Park/Bothell East area, located in unincorporated Snohomish County and City of Bothell. This project will improve the reliability, efficiency, and resilience of its water distribution system and address high-water pressure areas that exceed the pressure recommendations of AWWD and the Washington Department of Health.
Project Improvements
High water pressure poses several problems including increased risk of system failure, difficulty operating system valves, risk of property damage, as well as safety hazards to AWWD employees and others. This project will reduce water pressure by approximately 60 psi and is crucial in maintaining a safe and reliable water distribution system.
The improvements will include:
- Create two new water pressure zones.
- Install six new pressure reducing valve (PRV) stations and modify five existing PRV stations to create new water pressure zones.
- Replace 125 feet of existing water main at the intersection of Richmond Road and Filbert Road (SR 524) and remove an existing PRV vault.
- Install 1,330 feet of water main on 208th Street SE (SR 524, near the intersection of the Bothell Everett Highway (SR 527) and 40 feet of water main on 183rd Street SE at the intersection of Bothell Everett Highway (SR 527).
- Install 18 neighborhood water service shut-off valves.
Construction Impacts
- Construction may impact travel and cause temporary water interruptions in the area which will be communicated prior to water shutting down (water interruptions are expected to last less than 8 hours).
- If your house has a fire sprinkler system or your property has an irrigation system, the reduced pressure may impact the effectiveness of the system. You should consult with your system designer, specialist, and/or manufacturer for recommendations about testing and possible modifications. You will need to work with a fire sprinkler contractor to evaluate your existing fire sprinkler system to confirm the water demands of the system are not adversely impacted. Any recommended system testing and modifications are the owner’s responsibility.
- If your sprinkler contractor has any questions or areas of concern on fire sprinkler requirements, you should work with the fire marshal in your area. All work on automatic fire sprinkler systems should be done by a licensed fitter or certificate of competency-holder relevant to the type of system.
- Most customers in this area have an existing PRV behind their meter due to the high-water pressure. Once the pressure is reduced, you may need to keep the PRV in service. For the customers that no longer need a PRV, the existing valve can be left in place, if desired.
Project Schedule
General Notification
Please be advised that during periods when the commercial sprinkler system is temporarily out of service due to construction or maintenance, a fire watch must be conducted to ensure the safety of the premises and its occupants. This precaution is critical to mitigate fire risks and adhere to local fire safety regulations. Tenants are responsible for implementing fire watch protocols, which may include appointing qualified personnel to monitor the area for fire hazards continuously. We appreciate your cooperation in maintaining a safe environment during this time.
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