To assess the noise impact of the proposed Mine, Tetra Tech conducted sound measurements, noise modeling, and noise predictions for the area around the Project site.
Tetra Tech. 2009e. Supplemental Noise Study, Rosemont Copper Project. Project No. 114-320794 (100-SFO-T22436; 100-SFO-T23373). Prepared for Rosemont Copper Company. Tucson, Arizona: Tetra Tech. April.