To ensure the safety of the units during the flood sea-son and successfully complete the annual production tasks, Er Longshan Hydro Company and Da Gushan Hydro Corporation carried out the maintenance of all equipments during the power cuts.

Er Longshan Station had a repair welding for the unit 1 and 2 that were excessive wear, as well as replaced the water guide seal of the unit 3. the maintainers conducted a comprehensive inspection for all electrical equipments and changed the Protective Definite Value for the line 1113 requested by provincial standards. All technicians worked overtime and until 15 pm of August 14, 90% of the maintenance was completed.

Da Gushan Station checked and repaired the 1# water filter of the units as well as the electrical equipment of the booster stations. The workers cleaned the porcelain insulator of the booster stations to ensure the safe operation of the units and all electrical equipments during the flood season.