February 8th, 2006 at 09:32pm
According to the UEA website, the process used for this digging is Horizontal Directional Drilling. According to a person I know who knows about these sort of things, the direction of the drilling is controlled by water pressure, which is why it all starts on an angle but ends up going horizontally.
And a short video of the Horizontal Directional Drilling machine in action, including a UEA truck driving past.
Entry Filed under: Canberra Stories