Fire engine stuck in hole in street.

[G-CPTN]

A fire engine in Los Angeles has sunk into a large hole caused by a burst water main in the San Fernando Valley.
It is thought the crew were responding to a pipe break on a residential street.
All firefighters escaped without injury as the cabin slowly continued to sink into the muddy water-filled hole.

http://news.bbc.co.uk/1/hi/world/americas/8244904.stm?ls

[Western SMT]

More info and photos of the same incident

http://www.nydailynews.com/news/national/2009/09/08/2009-09-08_four_firefighters_escape_injury_when_fire_truck _falls_into_giant_sinkhole.html

http://www.google.com/hostednews/ap/article/ALeqM5gVO7EjVnGmOKde83ltUCTD2nk59gD9AJBP1G1

[redd9]

And I thought the Roads were bad in Rugby!

[G-CPTN]

Cavitation due to scouring (especially from leakage from a pressurised pipe) is commonplace. The surface 'structure' - usually a solid material such as tarmac or concrete can disguise this until a heavy load causes this to break through.