The Ranjit Sagar Dam , also known as the Thein Dam , is part of a hydroelectric project constructed by the Government of Punjab on the Ravi River on the Border of two states of India Jammu and Kashmir and Punjab . 60 % of the lake is part of J&K . The project is situated near Pathankot city in Pathankot district of the state of Punjab and Kathua city and Basholi tehsil of Kathua district in J&K . The project is the largest hydroelectric dam of the state of Punjab . The township where the site is located is called Shah pur Kandi Township . Feasibility studies for the project began in 1953 and geotechnical studies continued until 1980 . Construction began in 1981 , the generators were commissioned in 2000 and the project complete in March 2001 .

Question: ranjit sagar dam has builded over which river
Answer: the Ravi River