WET has been contracted by Rosemont to provide this response to the technical memorandum produced by Dr. Mathias Kondolf and James Ashby for Robert Leidy of the EPA. On October 30, 2014 WET met with the EPA and their contractors (authors of the technical memorandum) on site at Sonoita Creek to walk the conceptual design in the field. The purpose of the site visit was to help the EPA and their contractors understand the principles behind the conceptual design, and to collect constructive feedback from the EPA on improving the conceptual design. After the site visit, the Kondolf-Ashby team reviewed the conceptual design (WET, 2014) pertaining to the Sonoita Creek Mitigation Project and prepared a technical memorandum dated July 27, 2015 that summarized their review.
Water and Earth Technologies. 2016. Response to Technical Memorandum dated July 27, 2015 by Dr. Mathias Kondolf and James Ashby. Prepared for Rosemont Copper Company. Fort Collins, Colorado: Water and Earth Technologies, Inc. June 29.