Enka entered another joint venture with Bechtel in 1993 with the Tengiz Oil Field project in western Kazakhstan. In 1997, Enka and Bechtel were awarded the rights to build and operate the Gebze, Adapazarı, and Izmir power plants. Both companies began work on the Bregana-Zagreb-Dubrovnik Motorway in Croatia in 1998. The Gebze and Adapazarı Plants were completed in 2002 and the İzmir Plant, in 2003. All three power plants are still in use, as of 2018. Enka signed a contract in 2001 for work constructing an artificial island for the development of the Kashagan Oil Field, which is the largest oil field discovered in Kazakhstan in the last 30 years.