Montgomery & Associates

Evaluation of potential 100-year drawdown impacts from groundwater pumping to supply the proposed RC mine.

This report summarizes the results of hydrogeologic investigations at the Skunk Camp site to inform Water Working Group Action Item WR30 (Submittal of Skunk Camp Conceptual and Predictive Modeling Results).

The program has been developed to characterize and monitor groundwater and surface water chemistry upgradient, downgradient, and in the vicinity of the proposed Skunk Camp Tailings Storage Facility (TSF).

This submittal of hydrogeological data for the Skunk Camp site was prepared in response to Water Working Group Action Item WR-7 “Summary and Data for water quality, water level data base for Skunk Camp and Gila River”.

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 report presents the results of the Model including development, calibration, and predictive simulations in response to Water Working Group Action Item WR30 (Submittal of Skunk Camp Conceptual and Predictive Modeling Results).

This Monitoring and Mitigation Plan was prepared in response to public issues raised during scoping and public and agency comment on the Draft Environmental Impact Statement (DEIS) for the Resolution Copper mine and land exchange.

This report describes the conceptual hydrogeologic model of the Skunk Camp site. The conceptual model encompasses the entire Skunk Camp model domain, with specific detail given to the vicinity of the proposed Skunk Camp tailings storage facility (TSF).

Aquifer testing at the Skunk Camp investigation area in Pinal and Gila Counties, Arizona.

This catalog has been prepared to summarize available information for selected springs and seeps in the Upper Queen Creek, Devils Canyon, Mineral Creek, and Dripping Springs Wash watersheds.


Email Address Created for Land Exchange Questions

The Southwestern Region Office of Lands and Minerals Management is overseeing and administering the land exchange and appraisal process which includes the 2,422-acre Oak Flat Federal Parcel. All questions about the land exchange and appraisal process should be emailed to

Objection Period Ends March 1

Interested parties who previously submitted formal comments about the project have until March 1 to file an objection to the Tonto’s proposed decision.

For more info, view TNF News Release.

Programmatic Agreement Info

To comply with Section 106 of the National Historic Preservation Act, the Tonto National Forest developed a Programmatic Agreement (PA) and included it in Volume 5, Appendix O of the final EIS. The PA was created in cooperation with the Advisory Council on Historic Preservation, the State Historic Preservation Office, tribes and other consulting parties. The PA contains an agreed upon process for identifying, evaluating and addressing adverse effects to historic properties associated with this undertaking.

To review Volume 5 and the PA, Download Vol 5 PDF, 27 MB.

Forest Service Point of Contact

John Scaggs
Tonto National Forest

Apache Leap Special Management Area
Apache Leap SMA website