Basic studies of the Lavarak project, with the capacity of 47 MW in form of taking advantage from Lar dam equipments and its diversion tunnels, was carried out by Alexander Gip and Organic Consulting Engineers. This project was approved in 1975.
In 1977 access tunnel to powerhouse cavern was completed with the length of 1000 m for geotechnical tests.
In 1980 Lar dam water transition through pipe lines and tunnels with the length of 3 kilometer to Latian dam lake and finally to Tehran became necessary.
In 1981 the project was handed over to Lar Consulting Engineers.
In 1984 the geotechnical complementary tests (excavation of trenches, sampling and in-the-field tests) was carried out by Japanese Komogaigomo Co.
In 1997 Australian Smec Co. started cooperating with Lar Consulting Engineers.
1n 2000 the project was handed over to Iran Water and Power Resources Development Co. and the studies were followed more rapidly.
In 2001 the documents were reviewed and tender documents were prepared in form of three main contract
In 2002 construction activities began by Hara Institute including excavation of access tunnel to cavern crest, penstock and ventilation shafts...