CDG assisted with the planning phase of the project, which included options to add new site features in various locations throughout the 22 acre park. One improvement was a new aquatic facility and pool—the first natural swimming pond in the United States—that includes a constructed wetland treatment system rather than a typical chlorine treatment system. CDG provided structural engineering for the pool and designed the new accompanying facility. The four-season building houses restrooms, lockers, and storage in the summer and serves as a warming house during the winter. The building provides a welcoming new aesthetic to the historic park, serving as a visible sign of the park’s renewal, as well as a controlled point of access for pool visitors.