MWH Constructors Begins Construction on Ina Road Water Pollution Control Facility Upgrades

Broomfield, Colo., August 4, 2010 – MWH, the global wet infrastructure sector leader and provider of environmental engineering, construction and strategic consulting services, announced that it has signed a $169 million contract with Pima County (Ariz.) to begin construction as construction manager-at-risk (CMAR) for the Ina Road Water Pollution Control Facility (WPCF) capacity and effluent quality upgrade project. Construction on this latest phase of the project is expected to begin in August.

The contract is the largest approved in Pima County history, and comprises a significant portion of the $720 million total for upgrades to the County’s wastewater facilities. When complete, modifications to the Ina Road facility will replace outdated treatment facilities while increasing treatment capacity from 37.5 million gallons per day (mgd) to 50 mgd to meet federal standards.

“We’re pleased the County has selected MWH to lead the way on such a significant project for the residents of Pima County,” said Blair M. Lavoie, PE, Senior VP and Director of U.S. Operations for MWH Constructors. “These upgrades will ensure Tucson and the surrounding area can sustainably meet the needs of a growing population while maintaining a commitment to the highest environmental standards.”

Since June 2008, MWH Constructors has served as CMAR for preconstruction and construction activities at the Ina Road project site. Archaeological excavations conducted to assist the project in meeting County and State cultural resources compliance requirements revealed a 3,000-year-old irrigation network, increasing archaeologists’ understanding of the life ways of the ancient people of the Tucson Basin in what Archaeology Magazine named one of the top 10 finds of 2009. The finding has not impacted the project’s overall expected completion date of July 2013.