At the time they were closing it down, all of the wood in the buildings was being Salvaged. that meant carpenters deconstructing the buildings. In one room, where they must have struck the brass into cases, the machines were mounted on concrete footings to keep the impacts from shaking the building apart. when they pulled up the floor boards, there were literally tens of thousands of cases for 5.56, BMG, .45 and 7.62 laying in the subfloor. I know guys who drove home with pick up loads of brass. I think the one tidbit i heard was about 50% were trash, either from miss hits, or what ever, but the rest was good, from when the hoppers would overflow and the surplus was just swept away.
REmember, for a long time, TCAAP was producing something like a million rounds a day.
The site has 2,383 acres and 255 buildings.
Construction on Twin Cities AAP began in August 1941, and production started in February 1942. During the war, the plant produced more than 4 billion rounds of ammunition. from 02/42 to 07/45 is approx 1240 days, 4 bil./1240=3,225,806 rounds a day, on average!!!
After World War II, it engaged in repacking ammunition and demilitarizing unusable ammunition. The repack program was completed in 1947; the demilitarization program was completed in 1951. The plant began producing ammunition again in 1950.
From 1950 to 1957, 3.5 billion rounds of small arms ammunition, 3.2 million 195-mm artillery shell metal parts, and 715,000 155-mm shell metal parts were produced. The plant was placed on standby status from August 1958 to December 1965, when it was announced that the plant would be reactivated. By September 1966, the plant was again producing ammunition. It produced more than 10 billion rounds of various types of ammunition for the Vietnam War. An enclosed range was built on the site in the late 1960s to proof test cartridges, and other aspects of the facility were modernized in the late 1960s.