The developer of the Northern Pass transmission line that would bring Canadian hydropower to New England has proposed burying 60 miles of the line through scenic areas of New Hampshire, a change that will force a reduction in its capacity.

The price tag on the proposed Northern Pass transmission line in New Hampshire appears likely to rise after a draft environmental impact statement released last week showed the cheapest route would also have the greatest environmental impact.

Hydro-Quebec is looking to expand its exports to its long-standing customers in the Northeast power markets, a Quebec spokeswoman told the Connecticut Power and Energy Society.