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I agree in that it all depends on the details. You obviously can build on it, since, as an example, all of Florida, except for the panhandle, is karst. And building over holes in the ground is not necessarily a bad thing (otherwise subways and the like wouldn't make much sense).
by Jace on Sat Mar 26th, 2011 at 02:12:48 PM EST
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A subway train falling into a hole isn't going to contaminate the sub-surface water supply of the city for tens of thousands of years.

She believed in nothing; only her skepticism kept her from being an atheist. -- Jean-Paul Sartre
by ATinNM on Sat Mar 26th, 2011 at 02:21:24 PM EST
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I meant that we build quite a bit on top of things like subways, which are nothing more than holes in the ground.
by Jace on Sat Mar 26th, 2011 at 02:36:08 PM EST
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Subways are more than just holes through the ground. They have structure to prevent collapse. The inadequacy of such structures was vividly on display in Hollywood, CA during the last phase of construction for The Red Line back in the late '90s. Existing buildings were put at risk.

"It is not necessary to have hope in order to persevere."
by ARGeezer (ARGeezer a in a circle eurotrib daught com) on Sat Mar 26th, 2011 at 02:48:07 PM EST
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If a hole doesn't have structure, it wouldn't be a hole.
by Jace on Sat Mar 26th, 2011 at 08:50:14 PM EST
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True, but that doesn't mean it is nearly as strong as a purpose built structure.

"It is not necessary to have hope in order to persevere."
by ARGeezer (ARGeezer a in a circle eurotrib daught com) on Sat Mar 26th, 2011 at 10:36:40 PM EST
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