ARCADIS AWARDED US$17 MILLION CONSTRUCTION .

Amsterdam, January 11, 2012 - ARCADIS (EURONEXT: ARCAD), the international consultancy, design, engineering and management services company, today announced that its Brazilian subsidiary ARCADIS Logos has signed a large contract to provide construction management services for a major mining project in the Brazilian state of Minas Gerais. The client is Mineração Usiminas S.A., a company set up in 2010 as part of Usiminas S.A. group, Latin America's biggest flat steel conglomerate. The contract value amounts to US$17 million for 14 months of services.

Mineração Usiminas is responsible for the mining, railway transportation and port operations of the Usiminas group and has four mines in the so-called Iron Square of Minas Gerais. ARCADIS Logos will support Mineração Usiminas with construction management services for the implementation of the Friáveis Project, which includes the construction of two greenfield Ore Processing Plants. The Friáveis Project is part of an ambitious R$4 billion investment program involving the construction of industrial facilities, dams and loading terminals. With a planned production capacity of 3 and 4 million tons per year, the plants of the Friáveis Project are expected to start operations at the end of 2012. At the peak of the construction phase, ARCADIS Logos will have over 110 people at the jobsite.

"Our relationship with Usiminas started back in 2008, when ARCADIS Logos was chosen to provide consultancy services for the development of this impressive mining and industrial site. From this date on the partnership has grown up to the point where we are now signing our biggest contract with the company so far. It shows that mining continues to be a strong driver for our business in Brazil", said Manoel Antonio da Silva, CEO of ARCADIS Logos.

For more information please contact Joost Slooten at +31-20-2011083, or outside office hours at +31-6-27061880 or via email joost.slooten@arcadis.com.

About ARCADIS:

ARCADIS is an international company providing consultancy, design, engineering and management services in infrastructure, water, environment and buildings. We enhance mobility, sustainability and quality of life by creating balance in the built and natural environment. ARCADIS develops, designs, implements, maintains and operates projects for companies and governments. With 19,000 people and EUR 2.3 billion in revenues, the company has an extensive international network supported by strong local market positions. ARCADIS supports UN-HABITAT with knowledge and expertise to improve the quality of life in rapidly growing cities around the world. Please visit: www.arcadis.com