Sangtuda-2 Dam and Hydropower Plant Project

The Sangtuda-2 Dam and Hydropower Plant Project is located in southwestern Tajikistan, within Dangarinskiy District of Khatlon Region, near the village of Ghazalguzar. The dam site lies about 180 Km southeast of Dushanbe, the capital of Tajikistan, on the Vakhsh River, one of the major tributaries of the Amu Darya River. The Vakhsh River with a catchment area of 32,150 Km2 and an average annual discharge of 630 m3/s, is one of the largest perennial rivers in Tajikistan.
The Sangtuda-2 Dam constitutes an integral component of the nine-dam hydropower cascade on the Vakhsh River, of which five dams are located upstream of the project site and three dams are situated downstream.

The initial studies were assigned in the late 1980s to the Tashkent branch of Hydroproject Institute of the former Soviet Union. The Phase I studies commenced in 1984 and were approved by the Ministry of Energy of the Soviet Union in 1986. The phase II studies were conducted from 1986 to 1989 and were subsequently received final approval in 1990. Pursuant to the agreement between the Governments of Iran and Tajikistan, the project was awarded to Sangab Company under an Engineering, Procurement and Construction (EPC) contract. In 2006, the engineering consultancy services and construction supervision for the project were assigned to Mahab Ghodss Consulting Engineering Company.

Installed capacity: 220 MW
Average Annual Energy Generation: 1,008 GWh

Topographic surveying and preparation of topographic maps.
Geotechnical investigations, comprising exploratory drilling and field and laboratory testing programs.
Investigation of borrow areas and construction materials resources together with associated field and laboratory testing programs.
Geophysical surveys and investigations.
Hydraulic model studies
Phase I and Phase II engineering studies, and preparation of construction drawings.
Tendering process management and construction supervision services.

Clay Core Earthfill Dam	Dam Type
32	Dam Height from Foundation (m)
284	Dam Crest Length (m)
12	Dam Crest Width (m)
550	Dam Body Volume (m3)
66	Total Reservoir Capacity (m3)
4	Active Reservoir Capacity (m3)
630	Average Annual River Discharge (m3/s)
Gated Chute Spillway (5 Bays)	Spillway Type
4200	Discharge Capacity of Spillways (m3/s)
Surface	Powerhouse Type
2 (Kaplan Turbine)	Number of Units
19	Design Head (m)
220	Installed Capacity (MW)
1,008	Average Annual Energy Generation (GWh)
Dyke & Spillway	Diversion System / Culvert Type
1,270 (6 Bays)	Power Intake Capacity (m3/s)
14	Total Length of Access Roads (Km)