The original stage of the Yanchep line, formerly known as the Joondalup line, began construction in November 1989. It was opened between Perth station and
Joondalup station on 20 December 1992, and was extended to
Currambine station on 8 August 1993. An extension to
Clarkson station opened on 4 October 2004, and an extension to Butler station opened on 21 September 2014. Since planning for the line began in the 1980s, it has been planned to eventually reach Yanchep. Alkimos station was built as part of the Yanchep Rail Extension, which involved the construction of of track and two other stations: Eglinton and Yanchep. The Yanchep Rail Extension originated from a commitment by the
Labor Party prior to winning the
2017 state election to build the extension as part of its
Metronet project. In December 2019, the main contract for the Yanchep Rail Extension and the
Thornlie–Cockburn Link was awarded to the NEWest Alliance, a
joint venture of
CPB Contractors and
Downer Group. By the end of 2020, earthworks at Alkimos station had begun. The first major concrete pour for Alkimos station occurred in March 2021. Following that, it was planned for the concrete retaining walls and bridges to be built. By May 2022, the retaining walls were complete and backfilling was ongoing and by October 2022, construction of the platform and concourse had begun. By March 2023, the concrete slab for the concourse had been completed and installation of the structure steel for the concourse had started. The station's four escalators had been installed by May 2023, and by June 2023, the structural steel was complete and work on the roof was ongoing. In September 2023, work that was in progress included paving the platforms, lift car installation, and construction of the bus interchange canopies and ceilings and partitions for the platforms and concourse. By March 2024, the station's structure was complete and internal fittings and furniture was being installed. Landscaping was underway and the public art pieces were being installed. The Yanchep Rail Extension was originally meant to open in late 2021. After the May 2023 state budget, the government said that the Yanchep extension "is due for completion at the end of 2023, with services commencing in the new year". At the end of 2023, the Yanchep extension was still under construction and services were planned to commence in the first half of 2024. The actual opening date was revealed in April 2024. The Yanchep Rail Extension and Alkimos station opened on 14 July 2024, upon which the Joondalup line was renamed the Yanchep line. ==Services==