Yes.
After demolition of the existing building structures at Parramatta and during initial ground excavations, a lot of colonial architecture was found and therefore a lot of artifacts, which meant painfully slow archeological digs had to occur. This delayed the Parramatta site for over 12 months while these took place.
It shouldn't be an issue though as the tunnel boring machines towards Parramatta will be launched from Olympic Park so the station box should be complete by the time they reach there.
I dare say that a lot of the artifacts that have been found will be incorporated into the new station as a museum like display in the underground concourse, much like has been done at the new metro station at Central.
The rest of this metro is powering along.
Tunnel boring machines that were launched from The Bays station are approaching Lilyfield and it won't be long before they are at the Five Dock station box. Demo of both the entrances for Pyrmont station is complete and is beginning in Hunter st in the city. Burwood North and Olympic Park station boxes are complete and Nth Strathfield is well underway.
I eagerly await the report the state govt is about to release regarding this project.
In the meantime, the WSA metro is also powering along.
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