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Restoring Habitat in the Great Lakes to Save Endangered Species

Posted by Nick Patterson, Regional Project Manager on November 19, 2020

The Interstate Island Avian Habitat Restoration Project is listed as one of the many Areas of Concern (AOC) projects within the Great Lakes. Interstate Island is a small parcel of land located within the Duluth-Superior Harbor along the St. Louis River Estuary. Due to rising water levels, the island has shrunk in size by half in recent years, and along with-it important wildlife habitat has disappeared. The need to restore the rare avian habitat on Interstate Island has been a priority for years, and it came to fruition in 2020.

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Out of Sight, Out of Mind; The Importance of Underwater Inspections

Posted by Dillon Hogan on July 10, 2018

Lock and Dams, bridges, pipeline crossings, and barge terminals are all examples of water-based infrastructure. Ensuring that these structures maintain their integrity is essential to their continued operation, however water-based infrastructure presents an added challenge because a portion of the structure is underwater.

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Effective Solutions for Underwater Scour Repair

Posted by Dillon Hogan on February 21, 2018

According to the United States Department of Transportation, underwater scour is the leading cause of bridge failure, ahead of collisions and overloading. Scour is the erosion or removal of a streambed or bank material from bridge foundations due to flowing water. As many bridges sit over water, the potential dangers of scour cannot be ignored. There are many solutions to scour problems. However, there are two options that we find the most effective.

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