NM city frets as brine cavern threatens collapse

CARLSBAD, N.M. — The bright yellow signs are the first indication that things aren't right in Carlsbad.

"US 285 south subject to sinkhole 1,000 feet ahead," motorists are warned.

But there is little other evidence that in southeastern New Mexico's oil country, a giant cavern sits beneath the surface, ready to swallow part of the highway and possibly a church, several businesses and a trailer park.

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