CARLSBAD, N.M. (AP) — Gov. Susana Martinez has secured state funding to help shore up a giant cavern in southern New Mexico that is on the verge of collapse.

The Carlsbad Current-Argus reports the Republican governor on Thursday signed into a law a bill that redirects a portion of the vehicle excise tax to generate $30 million over three years to address the brine well near Carlsbad.

The cavity underneath the edge of the city was caused by the extraction of a salt formation. Experts expect an impending collapse, which could take with it a busy highway interchange that leads to two national parks.

Carlsbad and Eddy County have committed $4 million each in spending on the problem in additional to the state funding.

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Information from: Carlsbad Current-Argus, http://www.currentargus.com/