Karl Koller is the MN Department of Natural Resources Regional Clean Water Legacy Specialist covering Northeastern Minnesota. He started with the agency as a Fisheries Specialist after receiving a Master’s Degree in Fisheries management, with an emphasis in stream ecology. During his time as a Fisheries Specialist he led stream management efforts in his area, in addition to doing lake management work and coordinating watershed management efforts. His interest in the field of fluvial geomorphology grew as he attended multiple courses and applied while focusing on connectivity work (culvert design training and rulemaking) and channel restoration. With his move into his current position, his focus became almost entirely on streams and their watersheds. He assists in stability analysis work for impairment identification, provides training in fluvial geomorphology as well as culvert design and inventory work, and reviews and provides technical assistance on channel restoration designs. He also coordinates with sportsman’s groups to encourage them to address channel stability and water quality into habitat improvement projects, and to apply an assessment based approach to prioritization of projects. In his 25 years with the Department his view on stream work has evolved from an approach based on single objectives to address a perceived limiting factor, to encouraging a more holistic approach that requires identifying causes and addressing channel processes.