news room

CMP News

Central Maine Power Company, 83 Edison Drive, Augusta, ME 04336

Contact:   John Carroll        



CMP Breaks Ground on Coopers Mills Road Substation

AUGUSTA, Maine, August 17, 2011 — Central Maine Power Company (CMP) has started work on the new Coopers Mills Road Substation in the central Maine community of Windsor. The new facility will replace the Maxcy’s Substation nearby, which will be decommissioned.

“Once it’s finished, the Coopers Mills Road Substation will be one of the key hubs of our newly upgraded transmission system,” said Doug Herling, vice president of Special Projects at CMP. “Eight transmission lines will interconnect here, and the facility will provide much of the power to the northern and eastern parts of our service area.”

The early stages of work will involve site development for the new facility west of Cooper Mills Road and north of Maxcy's Mill Road on the eastern side of the existing transmission line corridor. A 2,700-foot gravel access road will be built from the Maxcy's Mill Road, across from the existing substation. Crews will also clear vegetation, do excavation and grading, and transport materials to the site.

After site development, construction of the substation foundation, structures, electrical components, control house, and fencing will take place, followed by the installation of the eight transmission lines that will connect at the facility. A new 170-foot microwave tower will be installed at the Coopers Mills Substation for communications purposes during outages.

The substation will have one large autotransformer, one 115/34 kV transformer, and one 115/12kV transformer, 25 circuit breakers, plus numerous switches and other components. Its purpose will be to step down transmission-line voltage for delivery of power to communities in the central and eastern parts of CMP’s service area.

Construction in the area is expected to continue for several years and be completed by 2014.

Central Maine Power Company’s MPRP is a $1.4 billion investment in Maine’s bulk power transmission system. The five-year project includes the construction of six new 345,000 volt substations, upgrades to more than 40 existing substations, and the installation or rebuilding of about 450 miles of transmission line in 75 communities from Eliot to Orrington. The project will improve the reliability of the company’s bulk power grid and to enable the integration of new energy resources in the region. The five-year project is expected to generate nearly 3,000 jobs in direct and indirect employment during the peak years of construction. The utility expects to complete the project by mid-2015.


About CMP and Iberdrola USA: CMP, a subsidiary of Iberdrola USA, is Maine’s largest electricity transmission and distribution company, serving more than 600,000 customers. The company has been ranked #1 in customer satisfaction three times by J.D. Power and Associates. Iberdrola USA, a subsidiary of global energy leader Iberdrola, S.A., is an energy services and delivery company with more than 2.4 million customers in upstate New York and New England. We are a team of dedicated individuals working as one to deliver value to our customers, employees and shareholders. By providing outstanding customer service and exceptional reliability, while holding safety and the environment in high regard, we aspire to be a world-class energy company.
For more information, visit and