{"id":16,"date":"2026-07-09T22:16:26","date_gmt":"2026-07-09T22:16:26","guid":{"rendered":"https:\/\/sts.swellmedia.online\/proyectos\/escondida-water-supply-ews\/"},"modified":"2026-10-28T18:10:16","modified_gmt":"2026-10-28T21:10:16","slug":"escondida-water-supply-ews","status":"publish","type":"sts_proyecto","link":"https:\/\/sts.swellmedia.online\/en\/proyectos\/escondida-water-supply-ews\/","title":{"rendered":"Escondida Water Supply (EWS)"},"content":{"rendered":"

The world's largest copper operation required securing its supply of desalinated water through large-scale underwater intake and discharge works, carried out in the open sea and under demanding oceanographic conditions.<\/p>\n

STS Scope.<\/strong> Construction of the underwater intake and discharge works for the EWS seawater desalination plant. The scope included two 2,000 mm diameter underwater intake tunnels (530 m each), a 2,000 mm diameter discharge outfall pipe, the recovery of the tunnel boring machines (TBMs) from a sea shaft at -40 m, underwater concreting of foundations, and the underwater assembly of 400-ton intake structures and the discharge pipes with their diffusers. STS had previously carried out the marine geotechnical studies and tunnel engineering, with over 220,000 man-hours completed without accidents.<\/p>\n

Differentiator.<\/strong> STS handled everything from marine geotechnical studies and tunnel engineering to underwater construction, including the underwater assembly of 400-ton intake structures and the recovery of tunnel boring machines (TBMs) from the seabed, using commercial-grade saturation diving and work-class ROVs. This flagship, world-class project was completed with over 220,000 man-hours and no accidents.<\/p>","protected":false},"excerpt":{"rendered":"

Submarine intake and discharge works for the BHP EWS desalination plant in Coloso, with tunnels and structures of 400 tons.<\/p>","protected":false},"featured_media":0,"menu_order":4,"template":"","class_list":["post-16","sts_proyecto","type-sts_proyecto","status-publish","hentry"],"yoast_head":"\nEscondida Water Supply: Obras Submarinas BHP | STS<\/title>\n<meta name=\"description\" content=\"T\u00faneles de captaci\u00f3n de 2.000 mm y montaje submarino de estructuras de 400 ton para la desaladora EWS de BHP en Coloso, Antofagasta. 2015-2016.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/sts.swellmedia.online\/en\/proyectos\/escondida-water-supply-ews\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Escondida Water Supply (EWS) \u2014 BHP | STS\" \/>\n<meta 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