CMP's 1920s equipment gets a $3M makeover

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Central Maine Power Company (CMP) has embarked upon a transmission line project in Portland, Maine.

CMP's current equipment has a long, but certainly not infinite, lifespan. The Iberdrola USA subsidiary began construction of the new electric transmission line to replace an existing three and a half mile line between the Portland and Westbrook substations.

"Some of this equipment has been in place since the 1920s," said CMP Spokesperson John Carroll. "It has a long lifespan, but not infinite. The new line will ensure continued reliability and provide transmission system capacity to meet growing demand in this part of the city."

Of the $400 million project, $3 million will be used this year to expand and modernize the system. As part of the improvements, the project will use slightly taller wood poles and higher capacity conductors, as well as have the capacity to work at a voltage higher than 34,500 as future needs dictate.

This week, CMP began cutting back and clearing trees to establish temporary access roads for construction vehicles. When the line is taken out of service at the beginning of March, crews will begin removing the existing line to make way for new poles, conductors and guy wires. Once construction is complete, CMP will stabilize any disturbed soil and restore groundcover.

Work in the corridor should be complete by the end of May.

For more:
- visit CMP

Related Article:
CMP launches major substation