Construction started near Mount Paldalsan in January 1794. Construction was finished in September 1796. Chae Jae-gong supervised the building process. Chae Jae-gong was a former minister in the government and the magistrate of Yeongjungchubu County. Engineers made new tools to help build the fortress. The Geojunggi was one of these new tools. It is a traditional Korean crane. They also made potter's wheels were created. They were used to move and put together large stones for the wall.