3.1 Background The Bellvue Hatchery facility needs a treatment system for the existing well water supply as they are shallow wells and susceptible to pathogens -primarily whirling disease (WD). 3.2 Work Tasks 3.2.1 Phase 1: Once a consultant/contractor is on board, the first phase would be design. CPW is looking for a water treatment system design that treats for WD. Previous research in another state has shown a system including VAF filters (25 micron screens) combined with a UV system. The anticipated design flow for the water supply is 1500 gpm, but the system should work for a variable water source that can fluctuate between 750 gpm – 1500 gpm. A booster pump is also expected as the anticipated head pressure in the system at the design location is expected to be low and not sufficient to achieve gravity flow with the expected treatment elements. CPW is open to an above-ground shed housing all the equipment/piping, or a below-ground vault depending on size and cost. CPW would like to be involved throughout the design process and would request the ability to approve the design prior to moving to phase 2 – construction. Refer to the attached General Site Map for approximate treatment location. Desired Completion Date: Anticipate design to be completed by around October 2025, with some flexibility there depending on the lead times of the proposed equipment. 3.2.2 Phase 2: Once the design has been approved by CPW, the selected consultant/contractor would move on to the construction phase. This includes ordering all equipment, prepping the site/performing any necessary civil work (if aquaculture consultant, they would potentially sub-contract this portion out), install the designed system, and perform any necessary testing after installation to ensure proper functionality and treatment of the water. The contractor needs to ensure the hatchery water can still flow to the existing infrastructure during construction (i.e., this system needs a bypass so the hatchery does not lose the water during construction). Construction is easier for hatchery staff if performed in the fall/winter. The project manager will be in charge of any necessary inspections to ensure compliance with the provided specs and submittals. Completion Date: The construction needs to be completed by 6/30/26.
