The U.S. Army Corps of Engineers, St. Louis District held a groundbreaking ceremony for a new 1,200 ft. x 110 ft. lock chamber adjacent to the existing 600 ft. x 110 ft. lock chamber in Winfield, Mo. today. The original Lock 25 opened May 18, 1939, as the third to the last lock built in the Mississippi River system and passes approximately 23 million tons of commercial commodities through annually. Eighty-four years later, the St. Louis District along with several dignitaries held the official kick off to welcome the new construction of the additional lock chamber that will allow for two-way traffic and the construction of a fish passage structure at Lock 22 in Saverton, Mo.