Dive Summary:

• Central Maine Power Co. (CMP) began work to replace three miles of electric transmission cables beneath the streets of downtown Portland, Maine.
• Contractors for CMP will complete the work a section at a time and expect the replacements to be installed by the end of December.
• CMP also plans an upgrade to the Union Street substation in 2013 that will include state-of-the-art integrated electronic controls and a gas-insulated switchgear.

From the article:

Central Maine Power Co. (CMP), a subsidiary of Iberdrola USA, began work to replace 3 mi of electric transmission cables beneath the streets of downtown Portland. The $3 million project will ensure continued high quality service to residents and businesses in the city’s Old Port and Congress Street districts. The work will not interrupt service to customers, but it may cause some congestion at worksites on some streets. ...