The Ford Calumet Environmental Center at Big Marsh Park re-inhabits a landscape scarred by industrial waste. It welcomes birders along a migration route, competitive cyclists, and serves as an educational hub for four nearby underserved communities. A mass timber structure, wood enclosure, and 89% recycled corten steel express decarbonization best practices—steel nods to the past, wood to a reclaimed future. Chicago’s first blackwater treatment wetland pushes sustainability’s political boundaries.