Editing Victoria line (section)

===Ventilation===
[[File:Heron Island Vic Line shaft.jpg|thumb|upright=0.75|Ferry Lane fan shaft and emergency access point at Heron Island, approximately halfway between {{stn|Blackhorse Road}} and {{stn|Tottenham Hale}} stations|alt=The aboveground Ferry Lane fan shaft building and emergency access point at Heron Island, approximately halfway between Blackhorse Road and Tottenham Hale stations]]
About 50 ventilation shafts were constructed during the construction phase.<ref>{{cite report |chapter-url=https://www.icevirtuallibrary.com/doi/pdf/10.1680/iicep.1966.8978|chapter=Discussion on Paper No. 6845 |title=Victoria Line: experimentation, design, programming, and early progress |first1=C. E. |last1=Dunton |first2=J. |last2=Kell |first3=H. D. |last3=Morgan |work=ICE Proceedings |volume=34 |issue=3 |date=1 June 1966 |page=459 |issn=1753-7789 |publisher=[[Institution of Civil Engineers]]|doi=10.1680/iicep.1966.8978 }}</ref> Midpoint tunnel ventilation shafts remain between stations. Special "local arrangements" are in place should it be necessary to evacuate passengers from trains via Netherton Road emergency escape shaft.<ref>{{cite journal|url=http://7julyinquests.independent.gov.uk/evidence/docs/TFL43-1.pdf |series=Tc100 |issue=2 |date=28 April 2002 |page=1 |title=Detrainment of Passengers |author=London Underground |journal=Standards|archive-url=https://web.archive.org/web/20110825152609/http://7julyinquests.independent.gov.uk/evidence/docs/TFL43-1.pdf|archive-date=25 August 2011|access-date=24 October 2018}}</ref> Planning permission for a shaft at Ferry Lane, next to Tottenham Hale station, was granted on 11 January 1968, during the first phase of construction.<ref>{{cite web |url=http://www.planningservices.haringey.gov.uk/portal/servlets/ApplicationSearchServlet?PKID=57126 |title=OLD/1968/0211 |date=11 January 1968 |quote=Land At Ferry Lane: Construction of new fan house form Victoria Line. |access-date=1 August 2013 |work=Online Planning Services |publisher=Haringey Council |archive-date=4 September 2015 |archive-url=https://web.archive.org/web/20150904093443/http://www.planningservices.haringey.gov.uk/portal/servlets/ApplicationSearchServlet?PKID=57126 |url-status=dead }}</ref>

By mid-2009, trial [[boreholes]] for a cooling system at Green Park station had been drilled and more were scheduled to be created by the end of 2009.<ref name="lul-md-report-2009q1"/> In 2010, ''[[Engineering & Technology]]'' reported that {{convert|200|L|impgal|}} of water per second for the cooling system was being pumped through heat-exchangers at Victoria station from the [[River Tyburn]] and into the River Thames.<ref name="douglas-2010">{{cite journal |url=https://eandt.theiet.org/content/articles/2010/07/air-conditioning-of-london-underground-reality-or-dream/ |volume=5 |issue=10 |title=Air-conditioning of London Underground&nbsp;— reality or dream? |date=2 July 2010 |first=Lawrie |last=Douglas |journal=[[Engineering & Technology]] |access-date=25 October 2018 |url-status=live |archive-date=25 October 2018 |archive-url=https://web.archive.org/web/20181025120614/https://eandt.theiet.org/content/articles/2010/07/air-conditioning-of-london-underground-reality-or-dream/}}</ref>

Between 2009 and 2014, thirteen ventilation shafts were refurbished. In the first phase were Drayton Park, Gillingham Street, Moreton Terrace, Pulross Road, Somerleyton Road and Tynemouth Road.<ref name="klettner"/> For the second phase were Cobourg Street, Dover Street, Gibson Square, Great Titchfield Street, Isledon Road, Kings Cross, Palace Street and Rita Road.<ref name="klettner">{{cite news|url=https://www.constructionnews.co.uk/archive/underground-keeps-its-cool-24-01-2008/|title=Underground keeps its cool|date=24 January 2008|time=Andrea|last=Klettner|work=Construction News|access-date=11 June 2012 |url-status=live |archive-url=https://web.archive.org/web/20181120054410/https://www.constructionnews.co.uk/archive/underground-keeps-its-cool-24-01-2008/ |archive-date=20 November 2018 }}</ref>

By 2009, changes at Cobourg Street were in the planning stage and demolition at Moreton Terrace, Somerleyton Road and Drayton Park shafts had taken place.<ref name="lul-md-report-2009q1">{{cite report |url=http://www.tfl.gov.uk/assets/downloads/corporate/04a-LU-MD-Report.pdf|work=Managing Director's Report&nbsp;– London Underground |date=20 May 2009 |editor-first=Richard |editor-last=Parry |title=Performance Report to the Rail and Underground Panel |issue=Period 13 2008/09, ended 31 March 2009 |author=London Underground Limited |publisher=Transport for London |access-date=12 June 2012 |archive-url=https://web.archive.org/web/20130801071258/http://www.tfl.gov.uk/assets/downloads/corporate/04a-LU-MD-Report.pdf |archive-date=1 August 2013 |url-status=dead}}</ref> Planning permission for Netherton Road shaft was granted on 8 September 1967.<ref>{{cite web |publisher=Haringey Council |url=http://www.planningservices.haringey.gov.uk/portal/servlets/ApplicationSearchServlet?PKID=76720 |title=OLD/1967/0517 |quote=Construction of new ventilation shaft and emergency staircase for Victoria Line. |date=8 September 1967 |access-date=1 August 2013 |work=Online Planning Services |archive-date=4 September 2015 |archive-url=https://web.archive.org/web/20150904093443/http://www.planningservices.haringey.gov.uk/portal/servlets/ApplicationSearchServlet?PKID=76720 |url-status=dead }}</ref> On 31 March, the demolition and rebuilding of Netherton Road shaft was allowed as [[permitted development]].<ref>{{cite report |chapter-url=http://www.haringey.gov.uk/mar_09_-_apps_decided_for_web.pdf |work=Planning Applications Decided |chapter=01/03/2009 to 31/03/2009 |date=6 April 2004 |access-date=21 June 2012 |title=HGY/2009/0151: LUL Mid-Tunnel Vent Shaft, Netherton Road N15 |quote=Demolition and rebuilding of existing headhouse in order to upgrade existing cooling system to Victoria Line. |publisher=Haringey Council |author=Urban Environment Directorate |archive-url=https://web.archive.org/web/20091025014722/http://www.haringey.gov.uk/mar_09_-_apps_decided_for_web.pdf |archive-date=25 October 2009 |url-status=dead}}</ref><ref>{{cite web |publisher=Haringey Council |work=Online Planning Services |url=http://www.planningservices.haringey.gov.uk/portal/servlets/ApplicationSearchServlet?PKID=195064 |title=HGY/2009/0151 |quote=Demolition and rebuilding of existing headhouse in order to upgrade existing cooling system to Victoria Line. |date=31 March 2009 |access-date=1 August 2013 |archive-date=4 September 2015 |archive-url=https://web.archive.org/web/20150904093443/http://www.planningservices.haringey.gov.uk/portal/servlets/ApplicationSearchServlet?PKID=195064 |url-status=dead }}</ref>