Construction and infrastructure

Reconstruction, Development and Extension of Sofia Airport

Geotechmin OOD started participating in the reconstruction and extension of Sofia Airport by implementing the project Strengthening of the Iskar River – South of Sofia Airport in the period 2002 – 2004.

From 2003 to 2006, Geotechmin joined the construction of a New Runway System as a main subcontractor of the Consortium M.A.Al-Kharafi & Sons W.L.L. & ADMAK General Contracting W.L.L. From 2005 to 2006, Geotechmin took part in the construction of Terminal 2 at Sofia Airport as a subcontractor of the Austrian company STRABAG AG. Two subprojects were executed within the New Runway System project: Civil Works on a New Runway System and Correction of the Iskar River.

Geotechmin’s innovative approach was further demonstrated in the second subproject Correction of the Iskar River. The construction works commenced with temporary diversion of the river from the area which needed to be corrected. It was achieved by building an inlet canal for diverting river waters to the lake behind the rockfill embankment and an outlet canal for subsequent returning of these waters into the Iskar River beyond the correction area. The dewatered riverbed was then strengthened with three different types of lining: reinforced concrete lining with geogrids (under a bridge which was being built at the same time), lining with RENO mattresses on the riverbed (in the sections immediately upstream and downstream of the bridge structure), and rock lining (for the remaining part of the correction).

Ministry of Transport (financing – European Investment Bank and Kuwait Fund jointly with MAK/ADMAK Consortium)
Geotechmin OOD
Project implementation period:
2002 – 2006


A private company with over 30-year history, which has implemented some of the most successful and significant projects in the mining industry, industrial construction, road infrastructure and environmental protection in Bulgaria.