Support work for the new electrical substations at Delahey and St Albans begins this week.
Work along Sydenham Road in Delahey will include installing underground electrical equipment, upgrading sewer lines, and re-establishing landscaping around the substation site.
The substation was installed in November.
The electrical work is expected to last until the end of February.
This will include excavation work between Sydenham Road and the rail corridor to allow for upgrading of underground electrical wiring and power supply equipment.
Landscaping and reclamation work also began, including the planting of new native grasses and the construction of new trails, gutters and fences.
The upgrading of the sewer lines is expected to begin in March.
Work on St Albans Road also started this week.
The work includes excavation and installation of conduits and landscaping work.
The substation construction works include the building equipment, cables and electrical equipment inside the substation building.
Work on the site is expected to last until the middle of the year.
Work at both sites is expected to generate medium to high noise, dust and vibration levels.
Most of the work will be carried out from 7 a.m. to 6 p.m. Monday and Friday. There will be work on the weekends.