충주댐 수몰로 물에 잠긴 청풍토성 안쪽에 자리 잡고 있는 마을이기 때문에 성안·성내·성두둑이라 하였다.
It was called Seongan, Seongnae, and Seongduduk because it was located inside the Cheongpungtoseong Fortress, which was submerged in the water due to the submersion of Chungju Dam.