Water Reclamation Facilities Upgrades Phase II

RH2 supported phased upgrades at the City’s Water Reclamation Facility to improve regulatory compliance, operational reliability, and long-term cost efficiency. An Ecology-approved Engineering Report established a phased approach, with initial improvements focused on required upgrades to UV disinfection, backup power, and the facility-wide SCADA system.

As construction progressed, RH2 advanced the next phase of improvements, which included a new solids handling system with thickening, dewatering, and truck loadout; aerobic digesters and aeration systems; odor control improvements; clarifier retrofits; a new operations and control building; and a vactor decant station. These upgrades enabled waste activated sludge to be treated and beneficially reused as biosolids on approved farmland.

The improvements significantly reduced operating costs, with projected savings of more than $4.2 million over 10 years, while maintaining tight cost control during construction. The project delivered major facility upgrades efficiently and with minimal change orders, strengthening system performance and long-term resilience.


Key Highlights:
- Delivered two phases of major WRF improvements from 2015–2017.
- Upgraded UV disinfection, backup power, and SCADA systems.
- Designed and constructed new solids handling and aerobic digestion systems.
- Added new operations building, odor control, clarifier retrofits, and vactor decant station.
- Completed $10.58M project with only 1.7% change orders.
- Achieved $400,000 in operating cost savings within four years.