STI s. r. o, slovak tunneling and mining company. www. sti. sk.
Hlavná 74
053 42 Krompachy
Extension of metro in Helsinki from station Ruoholahti, direction west to area Matinkyla in Espoo. Total length of metro extension is 13, 9 km. Capacity 100. 000 passengers per day. Travel duration 16 min. . Subway tunnel for Prague metro line C. The length of the tunnel is 1200m for a cross section of 45m2 . Project started in 2011 and completed in 2013. Project type: Metro.