The underground installations must be kept in a proper and reliable condition at all times. The maintenance work required for this includes in particular:

- Keeping / flushing the drains in machine / transformer cavern (MK/TK) as well as the tunnels,

- Keeping / flushing the soil drainage, hoses,

- cleaning drip trays,

- Cleaning of the gravel banks in the access tunnel.

In accordance with the maintenance schedules, all areas of the underground facilities are cleaned cyclically. For this purpose, the work plan of the 1st half of 2023 is attached as Annex 1.

Appendices 2 and 3 show examples of the locations and drainage systems to be flushed.

Value contract for the following services:

The underground installations must be kept in a proper and reliable condition at all times. The maintenance work required for this includes in particular:

- Keeping / flushing the drains in machine / transformer cavern (MK/TK) as well as the tunnels,

- Keeping / flushing the soil drainage, hoses,

- cleaning drip trays,

- Cleaning of the gravel banks in the access tunnel.

In accordance with the maintenance schedules, all areas of the underground facilities are cleaned cyclically. For this purpose, the work plan of the 1st half of 2023 is attached as Annex 1.

Appendices 2 and 3 show examples of the locations and drainage systems to be flushed.