Date: Sat, 7 Mar 2009 18:45:49 -0800 (PST)
>From: snipped-for-privacy@bbs.cpcn.com
>To: snipped-for-privacy@invalid.telecom.csail.mit.edu
>Subject: Re: To Bury or Not to Bury [Telecom]
>
>As to burying power lines, obviously individual lines to houses and
>lines to a block of houses can be buried. But is there a limit to the
>amount of voltage on a line that can economically be placed
>underground? I thought at one point higher voltages don't work so >well underground.
>
>I'll note that while in the city phone lines are buried, in the
>suburbs they're on poles.
Several of the major transmission lines feeding the City of Boston have been placed underground in the last few years:
"As part of its commitment to serve customers well, NSTAR has commenced construction of three new, underground 345-kilovolt (345-kV) transmission lines. The purpose of the new lines is to reinforce the Greater Boston Area, including surrounding communities, with additional electric power to meet both near term and longer term customer needs for reliable electric service."
See also:
And there is a "PowerPoint" presentation which explains the economics and why the utility decided to construct a new 18-mile underground 345-kv transmission line rather than augment existing lines or construct a new overhead line:
(Sorry about the very long URLs.)
Regards, Will