In article
,
thagor2008@googlemail.com () wrote:

> Chalk , sand , whatever. Point is theres nothing that can't be
> tunnelled through now as long as they money is available. If they
> think sand is an issue they should go ask the Egyptions how they built
> the cairo metro.

Precisely. The cost is too high, especially with a surface railway
network already available.

-- 
Colin Rosenstiel