The electricity department officials alleged that the kits on the 33KV underground double circuit line connecting Thivim to Porvorim, travelling 15 kms, conked off during monsoons, resulting in black outs in the coastal belt, which is a tourist hub.
The state had witnessed power failures last week in the coastal belt after Porvorim sub-station, which feeds electricity to Saligao sub-station covering the coastal belt, had stopped getting power supply for few hours.
The department has filed complaint with the ACB demanding inquiry against the officials responsible for approving and awarding the work.
The officials said that the department had to switch over to the supply from Thivim to Porvorim via Nachinola sub station, which did not have the capacity to handle the pressure and hence it also started collapsing.