A crumbling mineshaft caused the 40-foot-by-40-foot sinkhole that closed part of the highway, state transportation officials said.
A state Department of Environmental Protection map shows three abandoned mines next to I-80 in Wharton. The area that includes Wharton, Dover, Mine Hill and Rockaway had numerous iron mines in the ...
The 40-foot sinkhole on I-80 in Wharton had completely shut down ... abandoned mineshaft that collapsed underneath the highway. A map on the New Jersey Department of Environmental Protection ...