Hoh Rain Forest

Modifications to the Hoh Rain Forest Wastewater Treatment and Disposal System to meet Washington State Department of Health large on-site sewage system permit requirements. The work includes removal of vegetation to expand the drain field footprint and excavation of the expanded drain field as needed to install new treatment-disposal system; construction of new sand-lined beds and installation of pressurized subsurface drip emitter system; back-fill and surface restoration; and removal of existing septic tank aeration equipment and installation of new aeration pump/blowers.

  • LocationHoh Rain Forest
  • StatusCompleted
  • ClientNational Park Servvice