	The Rovina's upper reservoir is at an elevation of and is formed by an embankment dam. It has an active capacity of and depth of . Its catchment area is . The upper Chiotas reservoir was formed with the construction of a tall arch-gravity dam which lies at an elevation of . The dam's thickness ranges from at the base to at its crest. Its crest is long and the dam has a structural volume of . The Chiotas reservoir is also supported by a tall and long saddle dam, called Colle Laura, directly to its east. The saddle dam is also equipped with a spillway that has a discharge capacity of . The storage capacity of the reservoir is while can be used for power generation. The catchment area for Chiotas is and the reservoir reaches a maximum depth of .