The Pima County Board of Supervisors voted today to formally oppose Rosemont Mine, planned southeast of Tucson.

Supervisors will send notice to the Forest Service on Valentine's Day, issuing a formal objection to the agency's tentative approval of the mine and its final environmental impact statement.

The letter is expected to force the federal agency to respond to the county’s long list of concerns regarding planned copper mine in the Santa Rita Mountains.

A memo by County Administrator Chuck Huckelberry outlined a number of concerns the county has with the mine. He specifically faulted the project’s proposed mitigation and monitoring measures, calling them “woefully inadequate.”

Supervisor Richard Elías said the action by the board is consistent with consistent with the county’s long-standing concerns with the Rosemont Mine.

The county must submit the letter to the Forest Service no later than Feb. 14, Huckelberry said.

The decision by the Supervisors on Tuesday morning was not unanimous, however. Supervisor Ally Miller voted against the objectionl but did not make a comment about her vote.