The state Department of Natural Resources granted an expanded permit to Constantine Metals for seismic and other work in a site below the Palmer Project that it says could be used for tailings storage despite opposition from Klukwan and environmentalists.

The Palmer Project is a proposed copper, zinc and gold mine in the mountains above Glacier Creek, a tributary of the Klehini River, located about 37 miles from Haines.

In May, Constantine applied for an…