PacifiCorp has awarded a multi-year contract to build its Mona-Oquirrh transmission line in Utah, a key section of PacifiCorp's regional investment program to meet the current and projected needs of its electric customers.

The contract has been awarded to EC Source, a MasTec, Inc. affiliate. EC Source will provide engineering, procurement and construction services for this major transmission project, which will deliver additional power to serve customers of PacifiCorp's retail operating companies, Rocky Mountain Power and Pacific Power. Together, these companies serve more than 1.7 million customers in six western states.

"This segment, and our overall Energy Gateway transmission investment, is a fundamental part of PacifiCorp's plans and the region's plans to ensure long-term supply of reliable and affordable energy to meet the growing needs of our existing and future customers," said John Cupparo, vice president, transmission, PacifiCorp.

The Mona-Oquirrh segment is approximately 100 miles in length, consisting of a new single circuit 500/345-kV transmission line from an existing substation in Juab County to a future Limber substation to be built in Tooele County, and a double-circuit 345-kilovolt line from Limber to the existing Oquirrh substation in West Jordan, Utah.

"We're pleased to begin construction of this important addition to the transmission system we all depend on," said Richard Walje, president of Rocky Mountain Power. "We look forward to completing it on time and within budget to provide the safe, reliable electric service that is essential to the economies of all the states we serve. We appreciate the efforts of federal agencies and county and city officials in working through the many extensive details of this project."

During construction, EC Source will have multiple project facilities along the transmission line route with its main facility near Tooele, Utah, and will utilize extensively the local Utah labor force. Construction is scheduled to begin this summer, and the Mona-Oquirrh segment is expected to be in service for customers by mid-year 2013.