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West Point Treatment Plant

Completed – Summer 2014

September 2012 update – office annex construction is complete

Construction is complete at the West Point Treatment Plant to build the permanent, modular office annex that will replace temporary construction trailers. The new office annex provides code-compliant, functional office space for plant staff, replacing older structures that could no longer be occupied.

The project team developed a cost efficient design that follows King County’s sustainability goals:

  • The annex design incorporates "green" building materials and energy efficient design. For example, energy use will be reduced by using high-rated insulation and heating the building with the plant’s existing hot water loop.
  • The landscape plan utilizes vegetation consistent with existing plantings, including drought-resistant species to minimize maintenance and plants that will complement existing evergreen vegetation with seasonal color. Over 60% of the trees, shrubs, and ground covers are native species, and remaining non-native plants are well suited to our climate, requiring little maintenance after establishment.