06/02/2026
📸 PROJECT SPOTLIGHT | Kennewick Wastewater Treatment Facility Modernization
Silverline Plumbing is proud to have performed the hydronic system installation for the transformative $43+ million modernization and expansion of the City of Kennewick’s Wastewater Treatment Facility.
This state-of-the-art project replaces outdated lagoon systems with advanced wastewater biosolids treatment technology, including:
☀️ Solar-Thermal Drying
🔥 Pasteurization
🌱 Pelletization
These innovative systems harness the power of the sun to create KenneGro, a premium Class A marketable fertilizer product that promotes sustainability, energy efficiency, and environmental stewardship for the community.
Our scope included the installation of the facility's hydronic heating infrastructure, mechanical piping systems, pumps, heat exchangers, and greenhouse heating distribution systems that support this cutting-edge biosolids processing operation.
The photos below showcase the extensive hydronic piping network, boiler systems, heat exchange equipment, mechanical rooms, and greenhouse heating infrastructure that help make this facility one of the most innovative wastewater treatment projects in the region.
We are honored to have partnered on a project that turns waste into a valuable resource while creating a more sustainable future for the City of Kennewick.
A huge thank you to our project partners:
🔹 Merrell Bros.
🔹 CDN Buildings
🔹 Silverline Plumbing
Silverline — full-service electrical, plumbing, HVAC, and construction contractor in the Tri-Cities
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