Wastewater Treatment
Lynnwood Wastewater treatment plant (WWTP) collects and treats wastewater from a sewer service area of approximately 6,000 acres. The City’s goal is to protect public health and the environment by effectively treating sewage before it is discharged back into natural water bodies or reused.
WWTP Plant Processes
Lynnwood WWTP employs a series of techniques and technologies to fulfill our mission of protecting public health and preserving the environment. Discover how we remove impurities, harness new technologies and achieve compliance with rigorous environmental standards.
fUTURE cONSULTANT oPPORTUNITIES
The City of Lynnwood has completed procurement and is currently negotiating scope and budget with the selected consultant for the design of major upgrades to its Wastewater Treatment Plant (WWTP). These upgrades will modernize existing infrastructure, increase treatment capacity, and ensure long-term compliance with evolving regulatory requirements. This effort represents one of the most significant investments in the City’s utility infrastructure.
The City anticipates design activities to kick off by mid-October 2025 and intends to use a General Contractor/Construction Manager (GC/CM) delivery model, also known as Construction Manager at Risk (CMAR). The selected consultant brings demonstrated expertise in collaborative delivery methods such as GC/CM to ensure effective coordination throughout design and construction.
For more background information, consultants and stakeholders are encouraged to review the WWTP Facility Plan and Value Engineering report available on this website.
Lynnwood wastewater Treatment Plant Major Upgrades Roadmap
In 2020, the City engaged the services of RH2 consultants to conduct a thorough evaluation of the Wastewater Treatment facilities and provide engineering recommendations to address the operational deficiencies, regulatory requirements, and expansion of the facility to accommodate growth. RH2 provided engineering recommendations along with estimated costs and a preliminary implementation schedule for the proposed improvements.
Value Engineering Review of Lynnwood WWTP Facility Plan
Given the scale of these improvements, the City deemed it essential to undertake additional analysis and planning to ensure the seamless continuation of operations during the construction phase. The City has recently hired Hazen and Sawyer to perform a value engineering review of the WWTP Facility Plan. This process will help the city identify potential risks and opportunities, ensuring that the investments yield the maximum benefits to the public.
Value-Engineering-Review-of-the-Lynnwood-WWTP-Facility-Plan-Technical-Memorandum.pdf(PDF, 5MB)
WWTP Major Upgrades Current Status
The city of Lynnwood Public Works is currently in the selection process for hiring an Owner Advisor to assist the City in three phases:
- Phase1: Pre-design planning, Procurement and Management
- Phase 2: Design and Pre-construction
- Phase 3: Construction
KBA has been selected as the Owner Advisor. The City is planning to use collaborative delivery methods for this Major Upgrade Project once approved by the Washington State Project Review Committee.
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Questions? Contact Ehsan Shirkhani, Public Works Program Manager, 425-670-5218 or pwrequest@LynnwoodWA.gov