As a leading company for close-to-nature river improvement techniques, we seek to develop techniques that increase self-purification of streams by using the porous revetments method. These porous revetments, comprised of natural rocks among which aquatic organisms can live, have a broad structure that promotes contact oxidation and achieves excellent dimensional stability through integration of natural rocks with wire mesh. For the past ten years, we have participated in close-to-nature river improvement, and in projects for the purification of polluted rivers and streams, for local governments, the Korean Land Corporation, the Korean Rural Corporation and the Korea Water Resources Corporation at the head of Cheonggye Creek. In addition, we also have received a lot of praise and recognition for our work on projects for road construction, such as highways, and national and provincial roads, including retaining walls (SPA and GMW). We have resolved to become a 21st-century leader, which improves balance of development and increases the efficiency of homeland and local governments, through providing the best quality and services.