Giant 10-year O&M contract combines functions of two awards originally planned—one to manage millions of gallons of radioactive waste stored underground at the former weapons site and the other to operate its multi-billion-dollar waste treatment plant awaiting startup.
Superlative-filled tunnel-boring machines are nothing new to Seattle. From the infamous mole that dug a new State Route 99 tunnel to a handful of TBMs carving a new path for Sound Transit’s aggressive light rail expansion, tunneling under the Pacific Northwest city is almost commonplace.
Almost 100 projects were submitted for judging in this year’s ENR Northwest Best Projects competition. From those, an independent panel of judges selected 19 for recognition: 13 Best Projects and seven awards of merit across 15 categories.
The project team worked with the city of Spokane to establish a next level of treatment filtration system by adding a tertiary membrane treatment to remove phosphorus.
The design for the Anacortes water treatment plant resiliency project called for a 42-in.-dia welded steel pipeline to be extended underneath the Skagit River.