200 trucks a day during crossrail

I suppose we should do what we can to make sure Lord Berkeley gets what he wants, because that really will be a nightmare - 200 trucks in central London every day to dispose of soil. Eek.

http://www.contractjournal.com/Articles/2009/04/02/66494/200-trucks-a-day-in-central-london-during-crossrail.html

Why don't they just dig a big hole and put all that soil into it????