The U.S. Army Corps of Engineers - St. Paul District awarded a $45,463.00 firm-fixed-price purchase order contract to Braun Intertec Corp for testing of lock chamber core cylinders. The contract is for concrete core sampling and testing at three lock and dam sites on the Upper Mississippi River, including Lock & Dam 3 in Welch, Minnesota and Lock & Dam 4 in Alma, Wisconsin. The work includes vertically drilling 4-inch diameter core samples from the lock chamber walls, compressive strength testing, and petrographic analysis. The contract also requires investigating and evaluating the tensile strength between prepared concrete surfaces and newly placed repaired concrete at Lock & Dam 4 and Lock & Dam 6 in Trempealeau, Wisconsin, using ground penetrating radar. This contract has a completion date of January 7, 2023 and was not set aside for any socioeconomic program.