Metro depot

Länsimetro is building a metro depot at Sammalvuori. The Sammalvuori consortium (Kalliorakennus-Yhtiöt Oy, EM Pekkinen Oy, Terrawise Oy and Aro-Systems Oy) is implementing the excavation and construction contract for the Sammalvuori metro depot.The metro will start operating from Matinkylä to Kivenlahti in Espoo on Saturday 3 December 2022.

Contact information for the Sammalvuori worksite:

Direct phone line to the worksite: +358 (0)50 343 7233
Site Manager: Juha Selin, juha.selin(at)
Worksite address: Tyskaksenkaari 7 (visiting address Nöykkiönkatu 4), 02320 Espoo

Further information about the worksite

Länsimetro’s feedback line (Mon–Fri, 9 am to 1 pm): +358 (0)50 377 3700

Two underground halls are being constructed at the Sammalvuori depot – one for the night-time storage of 20 trains, the other for maintenance facilities. The maintenance hall is approximately 300 metres long, and it is wide enough to accommodate three trains and the required service space between them, for a total of roughly 25 metres. Technical facilities are also located at the northern end of the maintenance hall. The train storage hall is about 400 metres long and 26 metres wide. The depot will be heated entirely with geothermal heat and cooled using low-temperature groundwater. The excavation and construction contract was started in 2016 and will be completed in 2020.

At the metro depot, automation centres are currently being installed, and construction work and HVAC and electricity work are being finalised. System tests and final cleaning have also been started at the depot. Random fire alarm tests are being carried out during the day at the depot: the sound of the alarm may carry to the surrounding areas.

Go to the image bank (Flickr) to see what the worksite looks like and how the construction is progressing. We will update the photos as the work progresses.

The metro is being built on residents’ and nature’s terms – read more.