Public Transport Authority spokesman David Hynes said the $240 million extension was on schedule to open to passengers by the end of this year.
‘Butler station has to be completed before work can start to link the station to the Transperth network,’ Mr Hynes said.
‘While the station itself is almost complete, there is plenty of work to be finished on the connecting railway lines and supporting infrastructure.
‘During a line closure from February 28 to March 3, PTA employees and contractors removed existing track and overhead power lines, and installed and commissioned a new signalling system and new track and overhead powerlines to connect Clarkson to Nowergup yard.’
Mr Hynes said they were continuing to build and commission the track, overhead power lines and signalling system between Nowergup and Butler, and would start testing trains along the extension later this year.
‘Developments include hoisting into place the platform, concourse and bus information digital display boards,’ he said.
‘Passenger information consoles have been wall mounted at both platforms ” these have all been tested and commissioned.
‘In terms of security, CCTV cameras have also been installed, tested and commissioned.’
Mr Hynes said all carparks and the station’s bus interchange had been completed and landscaped, and they had installed a public artwork titled Rain on Water, designed to mimic the effect of raindrops falling on a still water surface.
Artist Geoffrey Drake-Brockman, who specialises in optical illusions and robotics, designed the colourful 38m-long aluminium and acrylic work, which spans the width of the station.
The artist also created the Totem robotic artwork outside Perth Arena (nicknamed The Pineapple) and Spiral for the WA Police headquarters.