Edneyville Community has published a paper reviewing underground options for the transmission line.
From Hendersonville Lightning:
The group decided to independently study the cost and viability of running underground lines, she said. “There’s just so much misinformation out there,” she said.
Although Duke contended it had not run underground lines, she cited an October 2013 article “by two of Duke’s senior engineers” in the trade journal Transmission and Distribution World that describes an underground transmission line installation that Duke completed that year. “This line, the Barnard Creek-Town Creek 230-kV underground line, is the same voltage as the line now proposed to be run overhead through Henderson County,” the report said.
Read more in the Hendersonville Lightning
Just this month (8/18/2015) it was announced that Northern Pass officials unveiled a new project route Tuesday that buries an additional 52 miles of the 192 mile transmission line under state roadways. As reported in the Concord Monitor (NH):
The company also announced a multimillion-dollar fund to invest in communities that host the project and a plan to direct a portion of the line’s hydropower to New Hampshire consumers.
But in order to bury more of the 192-mile line that would run from Pittsburg to Deerfield, the company had to scale back the size of the project from 1,200 megawatts to 1,000 – still enough to power 1 million homes.
Even though Northern Pass officials had previously said that burying more of the electric transmission line would send costs skyrocketing, a top Eversource Energy executive said Tuesday the project is still estimated to cost $1.4 billion.
Furthermore, the article stated that “Some had complained the project wouldn’t directly benefit New Hampshire, and instead feed power-hungry states to its south.”