Hoh Rain Forest

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

  • LocationHoh Rain Forest
  • StatusCompleted
  • ClientNational Park Servvice