Documents

Email communication as follow-up to submittal to include mitigation requiring water levels be maintained at current levels, and replacement of water lost in fractured Queen Creek bed by pumping water into Queen Creek above Magma Bridge.

Email communication on questions asked during the Resolution Copper Project DEIS public meetings on 9/10/19 and 9/12/19.

At approximately 12:28 p.m. local time on January 25, 2019, tailings dam B-I at Vale S.A.’s Córrego do Feijão Iron Ore Mine (“Dam I”), located 9 kilometers (km) north-east of Brumadinho, in the state of Minas Gerais, Brazil, suffered a sudden failure, resulting in a catastrophic mudflow that traveled rapidly downstream.

This technical memorandum was prepared in response to Groundwater Work Group Action Item WR-12 “Pull well records and other information for QV and model the impacts” to provide information to address Draft Environmental Impact Statement (DEIS) comments about potential impacts to Queen Valley, Arizona water supplies from proposed Resolution Copper mining activities.

This paper discusses reasons including seepage, foundation failure, overtopping, and earthquake for tailings dam failures and explores failure mechanisms by referring to the available literature.

This letter is in response to questions posed by BGC Engineering "Assessment of Surface Faulting Investigations at the Skunk Camp TSF Location".

Large spreading shrub or small tree up to 8 m (26.25 ft) tall, but more often 1- 4 m (3.28-13.12 ft) tall, with roughish, dark gray bark and densely stellate-pubescent twigs.

This Final Environmental Impact Statement (EIS) analyzes impacts that may occur from a proposed land exchange combined with a proposed plan amendment.

During the Water Working Group Meeting held on June 25, 2020, there was a request for more details about how nitrogen (N) chemical loads and concentrations were estimated in the block cave geochemistry and tailings solute models. The purpose of this memo is to provide these details and to serve as clarification to action item WR-20.

The purpose of this process memorandum is to provide the background and summary of the total direct and indirect emissions of greenhouse gases (GHG) associated with the proposed action for the Resolution Copper Mine (RCM) Development near Superior, Arizona.