The Dospat–Vacha Hydroelectric Cascade (Bulgarian: Каскада "Доспат–Въча") is situated in the western Rhodope Mountains of southern Bulgaria, on the territory of the Smolyan, Pazardzhik and Plovdiv Provinces.

[1] With catchment area of 2,083 km2 spanning from an altitude of 2,191 m at the summit of Golyam Perelik to 420 m at the Krichim Reservoir, it is among Bulgaria's most complex hydropower systems.

It includes five reservoirs and seven hydro power plants[1][3] — Teshel, Devin, Tsankov Kamak, Orphey, Krichim and Vacha 1 and 2, with a combined installed capacity of 500.2 MW, producing an average of 871 GWh annually.

[7] The main pressure derivation of the Teshel HPP begins from a water tower behind the left side of the Dospat dam and continues with a 732 m overground pipeline, a 16 km pressure tunnel, a 110 m high underground water tower with an engine room chamber and ends with a 522 m long underground pipeline to power station.

Apart from the waters of the Teshel HPP, it receives inflow from Vacha’s main stem the Buynovska reka via a derivation with a capacity of 6 m3/s.

Constructed in 2010, Tsankov Kamak has a double curvature arch dam, the first on Bulgaria of this type, reaching a height of 130.5 m and a length of 486 m. It forms a lake with an area of 3.3 km2 and a volume of 110.9 million m3.

[4] It is fed with waters from the reservoir from an open intake in its arm in the former bed of the Gashnya river, from where they are directed through a 600 m underground pressure steel pipeline.

Its length is 420 m.[15] Within the dam wall is constructed the Orphey Pumped Storage Hydro Power Plant, equipped with four Francis turbines with a combined installed capacity of 160 MW.

Its dam was constructed in 1963–1972 in concrete and has a height of 104.5 m and a length of 270 m. It forms a lake with an area of 0.8 km2 and a volume of 20.3 million m3 that winds for 4 km along the narrow canyon-like valley of the Vacha river.

The main output flows through the former and are later discharged to an irrigation system in the Upper Thracian Plain that also uses water from the Batak Hydropower Cascade to the west.