Waterloo Underground Depot

{{Short description|London Underground maintenance depot located in Waterloo, London}}

{{Use dmy dates|date=June 2023}}

{{Use British English|date=March 2017}}

{{Infobox railway depot

| name = Waterloo Underground Depot

| image = Waterloo station MMB 26 1992-stock.jpg

| image_size =

| caption = Waterloo Underground Depot seen from Waterloo Underground Station

| location = Waterloo, London

| coordinates = {{coord|51.5017|-0.1113|type:landmark_region:GB_scale:2000_source:Google|display=inline,title}}

| grid_ref_UK = TQ311798

| owner =

| depotcode = WC (1973 -){{cite web|url=http://www.therailwaycentre.com/Resource_data/AllTimeShedCodes.pdf|title=The all-time guide to UK Shed and Depot Codes|date=5 May 2006|work=TheRailwayCentre.com|access-date=19 August 2016|url-status=usurped|archive-url=https://web.archive.org/web/20131217221651/http://www.therailwaycentre.com/Resource_data/AllTimeShedCodes.pdf|archive-date=17 December 2013}}

| type = EMU

}}

Waterloo Underground Depot is a London Underground maintenance depot which stables the Waterloo & City line's fleet of 1992 Stock trains. The depot is entirely below ground and is situated beyond the Waterloo & City line platform end at Waterloo Underground station.{{harvnb|Webster|Greengrass|Greaves|1987|p=84}} Trains from Bank reverse at the depot before returning. It is one of the smallest depots on the Underground network, and one of the only two depots to be completely underground, the other being White City Depot on the Central line. For larger items like rolling stock, lengths of rail and other heavy machinery, access to the depot can only be achieved via a shaft on Spur Road, requiring a large crane to do so.{{Cite web|date=5 May 2006|title=Waterloo & City line / 5 Month closure / Scope of works|url=http://www.metronetrail.com/default.asp?sID=1141210191343|url-status=dead|archive-url=https://web.archive.org/web/20060505103521/http://www.metronetrail.com/default.asp?sID=1141210191343|archive-date=5 May 2006|access-date=2 May 2021|website=Metronet}}