Dong-Ah Geological Engineering Company Ltd. is a Korea-based company engaged in the civil engineering business. The Company operates its business mainly through five divisions: mechanical tunnels division, which uses shield and semi-shield methods to construction tunnels; ground improvement division, which uses deep cement-soil mixing (DCM) method in ground construction; general civil engineering division, which engages in the construction of roads, subway and bored piles, and diaphragm walls division; and engineering division, which provides design, research, measurement and other services. The Company is also engaged in the environment business, which engages in the construction of water treatment systems, including desalination plant and others. As of December 31, 2011, the Company had three affiliated companies.
(Source: ARS)