I think you are referring to Yeoncheon County.
Its website (in English) is
http://www.iyc21.net/_foreign/eng/m03/a03_b01_c01.aspThe small river is called Hantan-gang, which mergest into
Imjin-gang and flows to the west and into Yellow Sea.
The area now suffers from flood due to heavy rain.
These areas (Pocheon, and Yeoncheon) have some resort
facilities such as hot srping, golf clubs, fishing spots, etc.
besides military camps.
I could not find any info on Tuam-dong.
S. H. Woo