The translations here can be frustrating. I found this website http://mountainkorea.co.kr/en/ice_cl...de=bareumFalls
. This would put the fall somewhere around here 산28-1 Sanjeong-ri, Yeongbuk-myeon, Pocheon-si, Gyeonggi-do
Google has picture of a fall here. I may have a chance to do some exploring in that area in a couple of weeks.