National Park Service
Olympic National Park, Washington
The purpose of this Design-Build contract is to design and construct a new large onsite sewage system (LOSS) for the Hurricane Ridge Visitor Center to meet current and future peak flow conditions in accordance with Washington Administrative Code (WAC). Modifications to Hurricane Ridge Visitor Center LOSS will entail installing new septic and dosing tanks with duplex submersible pumps, sand-lined bed drainfield, pressurized multi-zone dispersal system with gravelless chambers, and new electrical pump controls. A portion of the collection system will be re-routed to direct wastewater to the new treatment infrastructure, and a new access road will be constructed for ongoing septic tank pumping and maintenance. Obsolete collection and treatment infrastructure will be decommissioned and abandoned in place.