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Roland Perry · September 6th 12, 09:06 AM posted to uk.transport.london,uk.rec.driving

In message , at 08:44:53 on Thu, 6 Sep
2012, d remarked:
I heard on the news that they might have to replace the tarmac on some of the
rest of the road. Why? It can cope with heavy rain so whats different about
mains water?

Water mains are under high pressure (never seen a film of a decapitated
fire hydrant?) and therefore are prone to wash out considerable amounts
of soil under the road, before it eventually collapses into the hole.
--
Roland Perry