Arizona environmental regulators are considering rule changes that could weaken protections for streams that would help clear the way for construction of the proposed Rosemont Copper Mine in the Santa Rita Mountains on the Coronado National Forest southeast of Tucson.
The Arizona Department of Environmental Quality will hold a public meeting to discuss the proposed rule changes Thursday, May 10 at the State of Arizona Office Building, 400 W. Congress in Tucson.
The all-day meeting includes a discussion that is related to streams that would be negatively impacted by the mile-wide, half-mile deep open pit mine from 3 p.m. to 5 p.m.
The late afternoon meeting will include a discussion on the definitions and regulations for designating and managing Outstanding Arizona Waters that currently receive the highest level of state protection under the federal Clean Water Act. The proposed mine would impact two streams currently classified as Outstanding Arizona Waters: Davidson Canyon and Cienega Creek.
The OAW designation is crucial because the U.S. Army Corps of Engineers has told Hudbay that its application for a Clean Water Act permit needed to build the $1.9 billion mine is in jeopardy because of the mine’s negative impacts on Davidson Canyon.
Davidson Canyon drains into Cienega Creek. Davidson Canyon was designated an OAW in December 2008 after the Pima Association of Governments passed a resolution supporting the protection.
The state has formed a committee to develop proposed rules. The committee includes two officials from ADEQ, the Sierra Club, Pima County, the Arizona Mining Association, Rosemont Copper, Cienega Watershed Partnership, Community Water Coalition, Arizona Game & Fish Department and National Park Service. Continue reading