Dartford Cable Tunnel

{{Short description|Tunnel under the river Thames in London, England}}

{{Infobox power transmission line

| name = Dartford Cable Tunnel

| country = UK

| owner = National Grid plc

| current_type = AC

| AC_voltage = 400 kV

| type = Underground tunnel

| est = 2004

| coordinates = {{coord|51|28|5|N|0|14|58|E|display=inline|region:GB_scale:2000}}

}}

{{Use dmy dates|date=September 2018}}

{{Use British English|date=February 2018}}

The Dartford Cable Tunnel is a 2.4 km utility tunnel beneath the Thames, upstream of the Dartford Crossing. With a diameter of ~{{convert|3|m|0|abbr=on}}, it carries a 400 kV National Grid electrical transmission cable. It is accessible by foot as a crossing of the Thames, but by authorised personnel only.{{cite web|author= |url=http://www.nce.co.uk/national-grid-builds-new-thames-tunnel-at-dartford/729148.article |title=National Grid builds new Thames tunnel at Dartford |publisher=Nce.co.uk |date=1 May 2003 |accessdate=15 July 2015}}{{cite web|author= |url=http://www.voltimum.co.uk/news/5337/cm/abb-completes-dartford-cable-tunnel-hv-cable-installation.html |title=ABB completes Dartford Cable Tunnel HV cable installation |publisher=Voltimum.co.uk |date=3 April 2006 |accessdate=15 July 2015}}[http://www.tunnelsonline.info/intextlinkresult.asp?linkid=9977] {{webarchive |url=https://web.archive.org/web/20041029164232/http://www.tunnelsonline.info/intextlinkresult.asp?linkid=9977 |date=29 October 2004 }} It was built in 2003–04 at a cost of £11 million (equivalent to £{{Inflation|UK|11|2003|cursign=£}} million in {{Inflation/year|UK}}).{{cite web|author=Nicolas Janberg |url=http://en.structurae.de/structures/data/index.cfm?id=s0018301 |title=Dartford Cable Tunnel (Dartford, 2005) | Structurae |publisher=En.structurae.de |date=23 July 2014 |accessdate=15 July 2015}}{{cite web|url=http://www.abb.co.uk/cawp/seitp202/ff30ff23cdf0a76fc125716c0058db5a.aspx |title=New current flows under the Thames |publisher=Abb.co.uk |date=15 May 2006 |accessdate=15 July 2015}}