Kevin Asmus, U.S. Army Corps of Engineers Regional Rivers Repair Fleet maintenance mechanic, welds channel sections for the fender timbers of the Black Rock Lock gates in Buffalo, NY, March 20, 2020. Buffalo District, Huntington District, and Regional Rivers Repair Fleet (R3F) personnel from fleets moored in Pittsburgh, Nashville and Louisville are working to improve the Black Rock Lock infrastructure and sustain its functionality for future navigation seasons.