Olli-Matti Kärkkäinen2018-07-05T09:45:20+00:00 Kluuvi Parking Facility and Civil Defence Shelter (1996-1999)
Olli-Matti Kärkkäinen2018-07-05T09:49:55+00:00 South Hermanni Underground Parking Facility (2006-2011)
Olli-Matti Kärkkäinen2018-07-05T09:52:21+00:00 Huhmarisvaara Underground Restaurant and Training Facility (1999-2002)
Olli-Matti Kärkkäinen2018-07-05T09:54:35+00:00 Sipoo Community Centre and Civil Defence Shelter (1999-2004)
Olli-Matti Kärkkäinen2018-07-05T09:56:56+00:00 Leppävirta Underground Winter Sports Centre (2000-2004)
Olli-Matti Kärkkäinen2018-07-05T09:58:56+00:00 City-Center Underground Maintenance Facilities and Civil Defence Shelter (2002-2011)
Olli-Matti Kärkkäinen2018-07-05T10:12:32+00:00 Tampere Region Central Wastewater Treatment Plant (2015-)
Olli-Matti Kärkkäinen2018-07-05T10:27:07+00:00 Salmisaari Underground Coal Storage Facility (1999-2004)
Olli-Matti Kärkkäinen2018-07-05T10:21:39+00:00 Helsinki Region Environmental Services Authority, HSY (2010-)
Olli-Matti Kärkkäinen2018-07-05T10:27:52+00:00 Hartwall Arena Training Hall and Restaurant (1998-1999)
