The On-Water Intensive Research Seminar is a cross-instutitional collaborative effort organized by the Penn Program in Environmental Humanities with Drexel University and the Academy of Natural Sciences. For ten days, faculty, students (including graduate and undergraduate sink|flow|spill|flow Summer Fellows), and Community River Fellows, are meeting at sites in, on, and along the Schuylkill and Delaware Rivers, as well as the Wissahickon Creek. To conduct this immersive, embodied research, we are using on-water classrooms (floats, wooden boats, kayaks, and motorized launches) and walking in creeks and marshes. Together we will co-create a public curriculum of educational materials and creative arts-science experiments designed for continued river engagement, historical and environmental literacy, and stewardship. We believe in the “right to research” and the need for public scholarship in the climate-changed city. Research findings and expressions will feed our living digital archive, accessible via The On-Water Intensive explores the river through interdisciplinary lenses and sets of questions: What is the Anthropocene, the geologic era following the Holocene, as we have made it and experience it on the tidal Schuylkill? Environmental history and science at the confluence of the Schuylkill and Delaware Rivers Arts-driven inquiry into the tidal river’s past, present, and future in a climate-changed environment Mini-lectures, collaborative experiments, and civic dialogues–guided by faculty from the Academy of Natural Sciences, Drexel University, and the University of Pennsylvania, and guest artists–introduce and elaborate each topic. Students receive intensive mentoring by the seminar instructors and collaborate closely with one another to develop their own final interdisciplinary projects designed to generate still more possibilities and opportunities for analytical, critical, and creative work along, on, or in the water itself.