SOFIA (Bulgaria), October 15 (SeeNews) – Bulgaria's state-owned Electricity System Operator (ESO) plans to open tenders for the construction of a new 400 kV power line from substation Plovdiv to substation Maritsa Iztok with a total value of 21.6 million euro ($24.7 million), the European Bank for Reconstruction and Development (EBRD) said on Thursday.