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Wastewater Treatment and Water Reuse System for Carlsborg UGA

Project Descriptionphoto

Since 2006, Clallam County and PUD #1 of Clallam County have teamed up to investigate the feasibility of building and funding a wastewater treatment and water reuse system for the Carlsborg UGA. In 2008, the Western Washington Growth Management Hearings Board ruled that, in fact, Clallam County was required to provide wastewater service to maintain Carlsborg’s designation as a UGA’s. The County and the PUD have since undertaken the development of a Sewer Facilities Plan, which will fulfill the requirement for sewer planning. A draft of the Sewer Facilities Plan is available for review.

The Sewer Facilities Plan was conditionally approved by the WA Department of Ecology on November 15, 2012. A copy of the approval letter is available for review. The Plan proposed an initial system to serve a portion of the UGA that would feature a gravity collection system and a Sequence Batch Reactor (SBR) treatment facility. The treatment system would later transition to a Membrane Bioreactor (MBR) as flows increase.

The recommended alternative in the facility plan is for the wastewater to be treated to Class A standards with reclaimed water used in place of drinking water for irrigation and outdoor watering for landowners along Carlsborg Road and for fire training by Fire District #3. Unused reclaimed water will be infiltrated into percolation ponds at the PUD facility at Idea Place, which will recharge groundwater and mitigate for water supply needs in a water-critical basin.

The Clallam County Board of Commissioners, in addition, is meeting with the City of Sequim to investigate further sending sewage from the Carlsborg UGA to Sequim for treatment.


Last updated May 2, 2013