The
Studen Kladenets Reservoir (язовир „Студен кладенец“) is the third largest
reservoir by volume in
Bulgaria after
Iskar Dam and
Kardzhali Dam. It is situated on the river
Arda, and is created behind the Studen Kladenets dam, 30 km south-east of the town of Kardzhali. There are another two dams of the Arda -
Kardzhali Dam to the west (upstream) and
Ivaylovgrad Dam to the east (downstream).