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).
The reservoir has a total volume of 489 million m3 and a drainage basin of 3,706 km² and is 29 km long. It is situated at an average 227 m above sea level, its dam being 338 m long and 67.5 m high. The top of the dam consists of nine spillways, each one being 10.5 by 5 m. "Studen Kladenets" Hydroelectric Power Plant is situated appr. 1 km downstream of the dam. The HPP has four Francis-type turbines, 15 MW each. There is undergoing project for reconstruction and upgrading the HPP with another 16 MW turbine and a smaller eco-turbine and after the completion of the project the total output will reach 85 MW with annual production of 165 GWh of electricity.
Studen Kladenets is a village in Krumovgrad Municipality, Kardzhali Province, southern Bulgaria.
Coordinates: 41°36′00″N 25°39′00″E / 41.6000°N 25.6500°E / 41.6000; 25.6500
Kladenets may refer to: