PSE Completes 40-Mile Transmission Line Upgrade, Improving Regional Electric Reliability

Line Spans Skagit, Snohomish Counties

BELLEVUE, Wash. (Nov. 3, 2010) – Puget Sound Energy yesterday completed transmission line upgrades along 40 miles of the company's existing utility corridor between its Sedro-Woolley substation in Skagit County and its Horse Ranch substation near Everett in Snohomish County. The project upgraded PSE's existing 115 kilovolt transmission line to a 230 kV transmission line and installed a new fiber-optic line, improving electric reliability to utility customers throughout the region and increasing capacity of the regional bulk electric system.

"The upgrade of this line brings important improvements to the entire regional electric system serving the Puget Sound area," said Dom Amor, manager of local government and community relations for PSE. "This line not only allows us to meet our customers' current and future demand for electricity, it serves as an important back up for several regional utilities, including the Snohomish Public Utility District."

PSE began work on the line in May 2009, which involved replacing 300 existing wooden H-frame poles with 300 new monopole steel structures, stringing new conductor and installing a fiber-optic line, which allows PSE to monitor and coordinate the transmission system remotely through instantaneous communications. To accommodate the new line, PSE upgraded its Sedro-Woolley substation and will be upgrading its Horse Ranch substation in 2011.

For more information, please visit PSE's Sedro-Woolley – Horse Ranch 230 kV transmission line project Web page at www.PSE.com/MajorConstruction.

About Puget Sound Energy

Washington state's oldest local energy utility, Puget Sound Energy serves more than 1 million electric customers and nearly 750,000 natural gas customers in 11 counties. A subsidiary of Puget Energy, PSE meets the energy needs of its customer base through incremental, cost-effective energy efficiency, procurement of sustainable energy resources, and far-sighted investment in the energy-delivery infrastructure. PSE employees are dedicated to providing great customer service and delivering energy that is safe, reliable, reasonably priced, and environmentally responsible. For more information, visit www.PSE.com.

Contact information

Gretchen Aliabadi, 1-888-831-7250