Slate Belt YMCA pool and gym arrive after 20 years in the making Updated 7:02 AM; Today 6:30 AM The Slate Belt YMCA's new swimming pool and gymnasium are scheduled to be completed and open around June 2021.John Best | lehighvalleylive.com contributor Facebook Share After more than two decades of planning in the works, a new pool and gym are opening in the Slate Belt. The Slate Belt Branch of the Greater Valley YMCA is scheduled to open its recently constructed swimming pool and gymnasium in June. The recent expansion also includes space for a preschool program. “Certainly, with these additions of the preschool, gym and pool, it makes it a great community center,” Greater Valley YMCA President/CEO David Fagerstrom said.