In 1932, Thomas M. Price and representatives from the Six Companies, Inc. joined forces to create the Aggregate Classification Plant. The Six Companies were actually six construction and engineering companies who had to pool their talents and resources in order to bid on the construction contract and build the Hoover Dam. The Plant remains a symbol of ingenuity needed to assist in creating western American history. Upon completion of Hoover Dam, it was abandoned in Boulder Basin and currently rests about 115 feet below Lake Mead’s surface. The former Aggregate Classification Plant is now a boat-friendly freshwater dive site spreading across eight underwater acres. Its mechanical remains are a must-see spot for inquisitive divers looking to explore.