Australia. This was because it was cheaper to purchase a complete locomotive than buy the components individually. They were named after sidings on the BHP system. Since they did not have the newer, isolated cab of the second and subsequent batches, 4301-4313 were traded in to Progress Rail for locomotives with newer cab assemblies and repatriated to the United States in January 2015 being taken to Muncie, Indiana for store. They were overhauled and sold to Chemin de fer Arnaud (4), Montana Rail Link (4) and Quebec North Shore & Labrador (5). It operated in 2015 a fleet of 23 SD70ACe/LCi locomotives beside of 142 standard SD70ACe, from which the newest locomotives are built in 2014. The second batch of 10 SD70ACes (4314-4323) arrived between August and November 2006. An order for a third batch of 13 SD70ACe/LCi's (4334-4346) was placed in August 2007, but such was the demand for locomotive power in the Pilbara region, a deal was done with BNSF for BHP Billiton to purchase ten standard North American SD70ACes (4324-4333) that were in build as their 9166, 9167, 9184–9191. Construction was sufficiently advanced when the deal was concluded for them to have been painted, hence they were delivered in BNSF orange livery. Some modifications have been made to bring them in line with the rest of the fleet. A fifth batch of SD70ACes (Numbers 4347–4355) was delivered in July 2009. An additional 18 units (numbers 4356–4373) were delivered in the second half of 2010, bringing the total of SD70ACe type locomotives in service to 72. In March 2012, BHP Billiton ordered a further 80. As at October 2020, BHP operated 10 SD70ACes (4324-4333) and 174 SD70 Ace/LCis (4314-4323, 4334-4497) In July 2012 fellow Pilbara operator, Fortescue Metals Group, took the delivery of the first of a fleet of 19, later extended to 21 (701-721). SD70ACS (2009-present) The SD70ACS is a AC variant for heavy haul freight, used in desert environments. The first 25 units were ordered for Saudi Railway Company in April 2009 and assembled in the London, Ontario, plant for delivery in the second half of 2010. Special features include a pulse filtration system, movable sand plows, EM2000 control system and FIRE display system. Mauritania's Société Nationale Industrielle et Minière placed a contract for six SD70ACS locomotives in October 2010. In July 2011 Etihad Rail ordered seven SD70ACS locomotives for delivery in 2012. Seven locomotives were