Michael and Quirsis Riney Primate Canopy Trails Jigsaw Puzzle Michael and Quirsis Riney Primate Canopy Trails The Michael and Quirsis Riney Primate Canopy Trails boardwalk was fabricated in 15 separate pieces, with each section having a unique curve and elevation! AISC member The Gateway Company of Missouri took special care fabricating members for the boardwalk's sinuous HSS spine to make sure erection at the challenging, tree-filled site went seamlessly.