A joint effort by the Committee of Retired Boilermakers, the Warren County Visitors Bureau, Lumber Heritage Region, and Penn Soil Resource Conservation and Development Council marked the final stage of seeking recognition for the men of United Brotherhood of Boilermakers Local #659 who worked at the Pittsburgh Des Moines Steel Company plant in Warren, Pennsylvania. From 1962 to 1965, approximately 280 men in Warren cut, fabricated, and welded the above-ground steel exoskeleton sections that became 80% of the Gateway Arch at the Jefferson National Expansion Memorial in St. Louis, Missouri. They shipped the fabricated sections 700 miles by train and semi-trucks from Warren to St. Louis, with each part measured, cut, and ground to within 1/64th of an inch so the segments would fit together perfectly. The project used over 900 tons of stainless steel, and the completed Arch in St. Louis stands 630 feet tall. On November 14, 2012, retired Boilermakers traveled by motor coach to St. Louis to claim their contribution to building the Gateway Arch and to identify Warren as the home of the Arch, where most of its wedge-shaped components were made. Tom Bradley, Superintendent of the Jefferson National Expansion Memorial, honored the men at a ceremony and lunch, telling them that although many had been instrumental in building the memorial, they had never seen it when it was completed. Warren's retired Boilermakers returned to St. Louis on October 28, 2015, for recognition again at the 50th anniversary Builders' Day celebration at the Arch.