Online decision support tools are proliferating to serve the needs of environmental managers and conservation practitioners, but most are static after their creation. Aging software components and datasets can lead to rapid obsolescence or inoperable tools. In the Great Lakes basin, the Fishwerks webtool represents years of investment in database, website, and analytical development to support decisions about site selection for removing barriers to fish migrations. The website is approaching a critical juncture where usability assessments and long-term planning are needed to ensure its continued value to the user community. There are also technical needs for website refinement, database customization and management, and code packaging that could enhance usability and facilitate transfer to a new host organization when appropriate.
