Seems this is going ahead
Whats to become of the Perth Station building ?? I see no mention of one of Perths oldest buildings.
As for the rail photo - damn shame and a good reason to get trackside to catch trains in the sun in the Perth city.
Freo line will cross the Mandurah bored tunnel then dive and be in cut and cover for a length before emerging at some point before City West. This is mainly greenfield and readily achieved. Sinking the Joondalup line is far more challenging as it emerges from the bored tunnel into the dive, has a short run on the flat before diving into Roe St tunnel. Building this lower would have massive disruption.
However, there is one additional key issue. Perth Yard is the only meeting point of the Mandurah to Nowergup to the rest of the system and connectivity would be lost. Presumably train deliveries and transfers would be by road between Claisebrook and Nowegup. Even more importantly, footy trains could not run from Mandurah to West Leederville.
Personally, I think the railway should stay where it is and be boxed in, with development above and around the box. The stated aim is to open up Perth Yard though the developers just want lots of high rise.
Also note that Lake St is so named for a reason, Perth Yard is on the site of a lake, good luck with foundations.
Pity Wayne Swan's budget money is going to a project that does not add any capacity to the network. Fine, it tidies up the city, but isn't this more about property development than improving rail?
If anyone has seen the overloaded state of the station car park at Clarkson these days, that would surely be enough evidence to extend to Butler urgently. I'm sure there are other worthy extensions to the Perth network that would get people out of their cars and on to public transport.
Of course it might also be a good idea ordering more trains now, as they take more than 3 years to arrive! Might be ready for the next boom.