Perform an assessment of fish passage barriers to ensure the quality of aquatic habitat for fish and health of fish populations. Collect structural information on floodgate conditions, materials, and dimensions, as well as environmental information on conditions of fish passages and habitats. Perform a comprehensive investigation to address structural and environmental impacts upon fish passage, stream connectivity, and general aquatic biodiversity. Capture photos of conditions and identify the GPS coordinates of the assessment location. Customize this mobile assessment app to accommodate specific passage management and assessment requirements. This app will work in both on and offline environments.