This Technical Memorandum updates and supersedes previous summaries of Tetra Tech’s findings related to predicted baseline (pre) and post-mining regulatory (100-year) hydrology, average-annual runoff for baseline and post-mining conditions and average-annual sediment delivery for baseline and post-mining conditions at the proposed Rosemont Copper Project (Project Site). The project site is located in Sections 25 and 36 of T18S, R15E; Sections 19, 20, 21, 28, 29, 30, 31, and 32 of T18S, R16E; Section 1 of T19S, R15E; and Sections 5 and 6 of T19S, R16E, G&SRM, Pima County, Arizona.
Zeller, M. 2012. Baseline and Post Mine Hydrology and Sediment Delivery at USGS Gage for Barrel Alternative. Document No. 054/12-320929-5.3. Technical Memorandum. Prepared for Rosemont Copper Company. Tucson, AZ: Tetra Tech. July 11.