The “Pirot” hydropower plant is located on the territory of South-Eastern Serbia, between the city of Pirot and Bulgarian border and utilizes the water from the Visocka River at the “Zavoj” dam profile. The “Zavoj” reservoir is a natural reservoir.
HPP construction works started in 1983 and the first unit started with operation in 1990.
The “Pirot” HPP most important characteristics with appurtenant structures are given below:
|Total volume||170 million m3|
|Maximum operating water level||616 m a.s.l.|
|Tunnel diameter||4,5 m|
|Tunnel length||9,093 m|
|Maximum net head||243.7 m|
|Minimum net head||180 m|
|Installed discharge||45 m3/s|
|Installed power||2 x 40 = 80 MW|
|Number of units||2|
|Annual number of operating hours||1,400|
(Source: PU EPS Web site)