What are we doing to preserve and protect the water that we love, revere, enjoy, and need in order to live? For three years, artist and activist Sean Connaughty has been wading into Lake Hiawatha to collect the trash that washes up on or near the shoreline. During this one-day exhibition, Connaughty and his collaborators will raise your consciousness. John Schuerman, whose politically inflected art is achingly humanist and emotionally resonant, is one of them. Erica Spitzer Rasmussen’s pop-up paper shop invites visitors to make paper from local flora. Presley Martin’s sculptures and installations are otherworldly, yet constructed from flotsam and jetsam. The event runs from sunrise to sunset, with a reception from 6 to 8 p.m.