The Vorotan Cascade consists of three hydroelectric power plants and five reservoirs with a combined installed capacity of 404.2 MW.

In 1954, it was highlighted that with proper infrastructure and careful planning, Armenia's energetic hydro resources might allow it to become an electricity exporter to neighbouring energy deficit areas like Azerbaijan and Iran.

[8] Despite the plans, Azerbaijan was against the import of electricity from Armenia, thus hindering the scheduled renovation and capacity expansion to take place at the end of the 1970s.

The Vorotan Cascade continued to supply electricity mainly to non-ferrous metallurgy industry in nearby Agarak.

[citation needed] After Armenia gained independence, the Voratan Cascade belonged to the state-owned energy company Armenergo.

[10][11] Next rehabilitation project was launched in 2010, financed by the €51 million credit from the German development bank KfW.

[14] ContourGlobal has started a six-year refurbishment program to modernize the plants and improve their operational performance, as well as safety, reliability, and efficiency, with the total investment of $70 million.

Total installed capacity of Vorotan Cascade is 404.2 MW and it generates 1.16 GWh of electricity annually.

[10] It is one of Armenia's largest hydroelectric power plants, with installed capacity of 157.2 megawatts (210,800 hp) and annual generation of 670 GWh.

[10] It is one of the largest hydroelectric power plant having an installed capacity of 171 megawatts (229,000 hp) and annual generation of 320 GWh.

[8][7] The Angeghakot and Tolors reservoirs are connected by a 10.5-kilometre (6.5 mi) free-flow tunnel which has throughput capacity of 23 cubic metres per second (810 cu ft/s).

Water runs from the Tolors Reservoir to the plant through a 6.9-kilometre (4.3 mi) diversion pressure tunnel which turns into a 1,260-metre (4,130 ft) single-lane penstock.

The plant has an installed capacity of 76 MW and a projected annual electricity generation of 210 GWh.

The last, the fourth structure is a surface spillway with a 160 cubic metres per second (5,700 cu ft/s) installed capacity and inclining drop.

The pressure tunnel is 8.2 kilometres (5.1 mi) long and it ends with a surge tank with capacity of 1,900 cubic metres (67,000 cu ft).