Saint Lawrence River crossing of HVDC Quebec - New England Transmission

Obelixx · July 22nd, 2009, 09:59 PM

Why was for the HVDC Quebec - New England Transmission as you can read on http://en.wikipedia.org/wiki/Quebec_...d_Transmission , a cable tunnel was built and the just few year old overhead line crossing dismantled? Building a cable tunnel under a river is the most expensive way to realize a powerline crossing of a river and only suitable in densly populated urban areas. Building an overhead crossing of a wide river is cheaper, but also still expensive. In my opinion it is not economic to build first an overhead powerline crossing with 2 100m+ towers and replace it just after a few years by a cable running through a tunnel?

***deasine*** · July 22nd, 2009, 10:01 PM

Wrong forum... I think you meant for the Canada forum.

July 22nd, 2009, 09:59 PM	#1
Obelixx Registered User Join Date: Apr 2005 Posts: 1,581 Likes (Received): 10	Saint Lawrence River crossing of HVDC Quebec - New England Transmission Why was for the HVDC Quebec - New England Transmission as you can read on http://en.wikipedia.org/wiki/Quebec_...d_Transmission , a cable tunnel was built and the just few year old overhead line crossing dismantled? Building a cable tunnel under a river is the most expensive way to realize a powerline crossing of a river and only suitable in densly populated urban areas. Building an overhead crossing of a wide river is cheaper, but also still expensive. In my opinion it is not economic to build first an overhead powerline crossing with 2 100m+ towers and replace it just after a few years by a cable running through a tunnel?

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July 22nd, 2009, 10:01 PM	#2
*deasine* =) Join Date: Sep 2007 Posts: 2,486 Likes (Received): 6	Wrong forum... I think you meant for the Canada forum.