Fish Passage Culvert Assessment in the St. Louis River Area of Concern in Wisconsin

Abstract

This project assessed 159 culvert crossings within the Wisconsin St. Louis River Area of Concern (AOC) to identify those disrupting hydrology and impeding aquatic organisms from accessing upstream and downstream habitats. Culvert assessment data was used in conjunction with stream habitat data, target species data and local road data to prioritize and recommend crossings that should be upgraded in order to restore hydrologic connections to high priority stream habitat. Recommendations from this project will be used by the WDNR to obtain funding for a minimum of two culvert upgrades. Rehabilitating crossings to allow fish movement will help the WDNR meet one of its AOC BUI Removal Targets. The Wisconsin Department of Natural Resources contracted with the University of Wisconsin Superior – Lake Superior Research Institute from November 2016 to September 2017 to assess culvert crossings and to work with stakeholders to develop a list of priority crossings.