MWH Acquires Mining Services Consulting Firm in Peru

Wednesday, August 20th 2008

MWH, a global provider of environmental engineering, strategic consulting and construction services, today announced the acquisition of Ground Water International S.A. (GWI), a hydrogeological consulting firm headquartered in Lima, Peru. GWI, one of the largest ground water consultancies in Peru, provides ground water and related environmental consulting services to mining clients across South America.

The transaction builds on MWH’s strategy to strengthen its water resources and mining services portfolio and to grow its presence in South America. Further, it will allow the company to increase the depth of its service offerings and expertise across the Americas and in other geographic regions in which MWH operates.

“Ground Water International has valuable and proven ground water consulting expertise that will augment MWH’s presence in Latin America,” said Alan Krause, President and Chief Operating Officer of MWH. “Our business in Latin America has been growing steadily over the past few years, and with the addition of GWI’s portfolio of services and ground water experts, we are well positioned to pursue a broader range of opportunities not only in South America, but in other parts of the world as well.”

Formed in 2004 and managed by David Evans and Todd Hamilton, the 45-employee firm has grown steadily over the past four years.

Growing the number of experts available to serve mining clients in Latin America continues to be a priority and strategic objective for MWH. MWH has 10 offices in Latin America that provide engineering services to the hydropower, mining, water management and industrial sectors.

Specifically, GWI brings expertise in:

* Site characterization; * Water supply and resource protection; * Mine dewatering and wastewater management; * Ground water input to geotechnical investigation and analysis; * Numerical modeling of ground water flow and contaminant transport; * Karst investigation and aquifer vulnerability analysis; * Contaminant hydrogeology; * Risk evaluation; and

* Mine closure planning.

Headquartered in Broomfield, Colo., MWH is a private, employee-owned firm with more than 7,000 employees worldwide. The company provides water, wastewater, mining, energy, natural resource, program management, consulting and construction services to industrial, municipal and government, and other private sector and public sector clients in the Americas, Europe, Middle East, India, Asia and the Pacific Rim. For more information about MWH, please visit the company’s Web site at www.mwhglobal.com.