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UK National Grid wants to replace overhead pylons with a 3km tunnel
The National Grid wants to remove the pylons and replace them with a 3km tunnel under the Dwyryd Estuary in order to reduce the visual impact on the site with sits partially within the Snowdonia National Park.
http://www.cambrian-news.co.uk/article.cfm?id=132825
Gwynedd Council unanimously backed proposals by the National Grid to remove 10 of the pylons and replace them with a 3km tunnel under the Dwyryd Estuary.
https://www.dailypost.co.uk/news/north-wales-news/three-kilometre-tunnel-dug-under-18608844
National Grid's energy cable tunnels in Snowdonia will be built by Hochtief.
National Grid’s Visual Impact Provision (VIP) project, will see the removal of ten pylons and a roughly 3km stretch of existing overhead line, which runs from Minffordd, across the Dwyryd Estuary, and continues eastwards to just beyond Cilfor.
New Civil Engineer writes that the tunnel will be bored between two shafts and will have a diameter up to 4.4meters. Tunnel Boring Machine method will be used.
cover tunnel photo by: Matt Brown from London, England / CC BY
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National Grid has submits the planning application to tunnel within the Snowdonia National Park.
https://www.newcivilengineer.com/latest/national-grid-submit-snowdonia-tunnel-plans-09-04-2020/
National Grid submits Snowdonia tunnel plans
www.newcivilengineer.comThe energy company wants to remove 3.5km of overhead power lines and bury them underground. To do so it is seeking to construct a 3.5km tunnel beneath the