The Weyerhaeuser King County Aquatic Center is closed for upgrades until mid-September as the facility undergoes improvements, according to King County Parks.

Built in 1990, the facility hosts many local, state and national swim and dive competitions. With three pools and 2,500 seats, the center also offers lap swim, family swim and swimming lessons.

The closure is part of a two-phase plan; the next closure will be in summer 2023, according to the county parks department.

Phase I of improvements are to resurface the pool deck with non-slip surfaces, replace elevator equipment that has reached the end of its useful life and to improve ADA accessibility, according to the county’s website.

Phase II, the closure taking place next summer, is for HVAC and water heating systems and lighting system replacement.

These projects lower maintenance costs, improve accessibility, and replace materials and systems with energy-efficient options. Improvements like these make it “possible for the WKCAC to continue to attract the same quality of high-level competitions that the facility has hosted since it was built 1990,” according to the website.

In previous years, the aquatic center hosted the PAC-12 Swimming and Diving Championships, and the 2000 and 2012 Olympic Diving Trials. In 2025, the facility will host the NCAA Swimming Championships.

COVID-19 testing offered in the northern parking lot of the facility will not be affected by the closure and remains open. To look up the status of the testing site, visit covid19.altius.org/testing-information.