Water Resources

The documents listed below are Baseline Reports categorized topically as water resources.

This catalog has been prepared to summarize available information for selected springs and seeps in the Upper Queen Creek and Devils Canyon watersheds (UQC/DC). The springs and seeps included in this catalog were selected based on proximity to planned facilities as proposed by Resolution Copper (RC) for the Resolution mine project. The catalog was prepared by Montgomery & Associates (M&A) and WestLand Resources, Inc. (WRI) on behalf of RC.

As part of continuing biological resources support for Resolution’s GPO, WestLand conducted surveys for special-status plant species associated with water features that occur in the vicinity of the GPO (Study Area). The objective was to survey for special-status species with potential to occur in the Study Area, and to continue compiling baseline data on wetland and riparian plant species at a combination of lentic (ponds and stock tanks) and lotic (perennial and intermittent drainages, seeps, and springs) habitats (hereafter, “sites” and “reaches”, respectively).

This report was prepared for Resolution Copper (RC) to describe surface water features monitored in the Oak Flat area. Sites monitored, methods of data collection, and findings of data collection from March through September 2017 are presented. Fourteen sites were studied to provide baseline technical hydrologic monitoring in the Oak Flat area within or adjacent to the projected disturbance zone of the proposed RC block cave mine.

This report presents a flood-duration flow frequency analysis for selected durations (1 day, 3 day, 7 day, 15 day, and 30 day) at 173 streamgaging stations throughout Arizona and in western New Mexico.

Computed flood flow frequency and volume‐duration‐frequency values for points of interest on Queen Creek and Devil’s Canyon. The intent is to quantify surface water hydrology in these two watersheds to assist Resolution Copper Mining (RCM) with assessment of potential impacts to surface water flows associated with the proposed mining and associated activities near Superior, Arizona.

Flooding is among the worst natural disasters responsible for loss of life and property in Arizona, underscoring the importance of accurate estimation of flood magnitude for proper structural design and floodplain mapping. Twenty-four years of additional peak-flow data have been recorded since the last comprehensive regional flood frequency analysis conducted in Arizona. Periodically, flood frequency estimates and regional regression equations must be revised to maintain the accurate estimation of flood frequency and magnitude.

This catalog has been prepared to summarize available information for selected springs and seeps in the Upper Queen Creek and Devils Canyon watersheds. The springs and seeps included in this catalog were selected based on proximity to planned facilities as proposed by Resolution Copper for the Resolution mine project. The catalog was prepared by Montgomery & Associates and WestLand Resources Inc on behalf of Resolution Copper.

This report has been prepared to summarize the review and analysis of long-term hydrographs to support ongoing National Environmental Policy Act (NEPA) review process for the Resolution Project near Superior, Arizona. The principal objective of this report is to present and review groundwater level and hydraulic head data for the RC hydrologic monitoring network. Limited interpretation is provided to help describe notable hydraulic changes.

This surface water baseline report has been prepared to support the ongoing National Environmental Policy Act (NEPA) review process for the Resolution Project near Superior, Arizona. This report is an addendum to the Surface Water Baseline Report prepared by M&A (2013) that includes detailed analysis and discussion of surface water monitoring results in the Resolution Project study area; Devils Canyon, Queen Creek, and Mineral Creek.

A series of stream gauges is located within the upper Queen Creek, Devil’s Canyon, and Mineral Creek watersheds, located near Superior, AZ. These gauges are owned and maintained by Resolution Copper Mining (RCM). The historical stream gauge records were analyzed by JE Fuller Hydrology & Geomorphology, Inc in order provide an assessment of the quantity and quality of the surface water data. These data were also used to characterize and quantify volumetric surface water discharge characteristics in the three watersheds.

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Temporary Contact Update

The Tonto Supervisor’s Office in Phoenix remains temporarily closed in July 2019 due to a building renovation project. As a result, questions from the media and general public regarding the Resolution Copper Project and Land Exchange should be e-mailed to John Scaggs at: john.scaggs@usda.gov

EIS Timeline - Feb 2019

  1. Proponent submits revised Plan of Operations [Sep 2014]
  2. Federal Register Notice of Intent to prepare EIS [Mar 2016]
  3. Public scoping period and scoping meetings
    [5 meetings between Mar-Jun 2016; comment period extended from 60 days to 120 days, closed Jul 18, 2016 ]
  4. Compile and review existing data
  5. Prepare project description and identify project alternatives
  6. Publish Alternatives Evaluation Report [Sep 2017]
  7. We Are Here
    Validate Baseline Information; analyze environmental effects
  8. Prepare Draft EIS
  9. Federal Register Notice of Availability of Draft EIS
  10. 90-day public review and comment period, with public meetings
  11. Respond to public comments and prepare Final EIS
  12. Federal Register Notice of Availability of Final EIS and Draft ROD
  13. 45-day Public Objection Period
  14. Resolve objections to Final EIS and draft ROD
  15. Issue Final Record of Decision

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Forest Points of Contact

Media & General Info
John Scaggs
jscaggs@fs.fed.us

Project Manager
Resolution Copper
Mary Rasmussen
mcrasmussen@fs.fed.us

Apache Leap Special Management Area
Apache Leap SMA website