The USFS developed a model (referred to hereafter as the October 2013 Model) to attempt to quantify the impact to surface water resources in Upper Cienega Creek and its tributaries resulting from the modeled groundwater drawdown from the Rosemont Copper Project (the Project). In this document, we provide a critique of the October 2013 Model and discuss its appropriateness for use in an ESA Section 7 consultation. In addition, we provide an alternative approach toward the assessment of potential impacts to these surface water resources.
Rosemont Copper Company. 2014a. Review of USFS Model and an Alternative Approach to Inform the Effects of Groundwater Drawdown on Cienega Creek. Prepared for the Coronado National Forest. Tucson, Arizona: Rosemont Copper Company. June 6.