Water Resources

August 13, 2012

This report summarizes meteorological measurements collected at the Rosemont Copper Mine monitoring stations. The Rosemont Copper Mine is a new open pit copper mine proposed by Augusta Resource...

July 11, 2012

This memorandum provides the results of surveys for the spring features identified as potentially occurring in the Analysis Area. The objectives of the survey were to:

  1. Map springs...

July 1, 2012

This report develops the key site water management structures planned for the Rosemont Copper Project designed to protect the environment and Project facilities. This preliminary site water...

June 29, 2012

A response to the May 3, 2012 letter from Coronado National Forest (CNF) concerning their review of documents submitted in support of groundwater impacts for the Rosemont...

This technical memorandum responds to the May 3, 2012, Coronado National Forest (Forest) request for additional information on the Rosemont Project groundwater flow models. Groundwater flow models...

June 25, 2012

Engineering Analytics Inc has prepared this Technical Memorandum to present a conceptual design for a riser pipe that will allow Rosemont to install a pump back system to remove treated water from...

June 1, 2012

The Rosemont Copper Project (Project) is a proposed open pit mine located in Pima County, Arizona with an operational life of 20 to 25 years. This Project will require the construction of four (4...

This Integrated ...

March 30, 2012

The Rosemont Copper Project (Project) site is located in the Santa Rita Mountains southeast of Tucson. Peaks in the Santa Rita Mountains are over 6,000 feet above mean sea level (amsl) and the...

March 15, 2012

On November 1, 2010, the U.S. Army Corps of Engineers (Corps) approved a preliminary jurisdictional determination (JD) of potential

On November 1, 2010, the U.S. Army Corps of Engineers (Corps) approved a preliminary jurisdictional determination (JD) of potential

March 13, 2012

On November 1, 2010 the U.S. Army Corps of Engineers (Corps) approved a preliminary jurisdictional determination (JD) of potential

On November 1, 2010 the U.S. Army Corps of Engineers (Corps) approved a preliminary jurisdictional determination (JD) of potential

March 1, 2012

This plan is designed to supply data required to detect potential impacts from Project development on springs and on regional streams in and downstream of the Project area, particularly the reach...

January 31, 2012

This Technical Memorandum summarizes the conceptual stormwater control features anticipated for the Barrel Alternative associated with the proposed Rosemont Copper Project (Project) in Pima County...

This technical memorandum summarizes the conceptual stormwater control features anticipated for the Scholefield-McCleary Alternative associated with the proposed Rosemont Copper Project in Pima...

January 13, 2012

December 23, 2011

The purpose of this document is to present an overview to Maest and Kuipers (2006; hereafter M-K (2006))1 and that study’s effort to assess the reliability of water quality...

November 12, 2011

Comparison of sources of recharge and withdrawal in mine water supply analysis area.

The proposed mine would pump groundwater near Sahuarita on the west side of the Santa Rita Mountains and transport it to the mine site on the east side.

October 11, 2011

Rosemont Copper is transmitting the following applications for your records.

  • Section 404 Permit Application for the Rosemont copper Project ACOE File No. SPL -2008-00816- MB,...

August 19, 2011

Seeps and springs (hereafter referred to as springs) occupy a very small land area in the arid southwest, yet they are vital resources for many plant and animal species. Despite their limited...

In this technical memorandum, WestLand Resources, Inc. (WestLand) describes the likely range of effects of the proposed action and action alternatives being considered by the Tonto Nation Forest...

August 18, 2011

The technical memorandum contains the Pima County Regional Flood Control District (PCRFCD) comments regarding hydrology for Rosemont Mine, followed by Tetra Tech’s responses.

At the request of Rosemont Copper, Montgomery & Associates (M&A) evaluated...

August 17, 2011

At the request of Rosemont Copper Company, Engineering Analytics (EA) has completed a postclosure analysis to determine the...

August 5, 2011

At your request, MWH Americas, Inc. (MWH) has reviewed the input and output (I/O) files prepared by Montgomery and Associates (M&A) for the simulations of Rosemont Copper’s mine supply...

July 21, 2011

This technical memorandum provides a summary of Tetra Tech’s findings related to predicted regulatory (100-year) hydrology and average-annual...

July 11, 2011

This technical memorandum provides a summary of Tetra Tech's findings related to predicted regulatory (100-year) hydrology and average-annual...

June 9, 2011

 
This tech memo provides responses to comments made by SRK on behalf of the CNF concerning the Infiltration, Seepage...

June 8, 2011

 
The application of rock riprap associated with the drop chutes will be re-evaluated in the final design effort and alternate channel...

May 31, 2011

 
The springs inventory was extensively revised by SWCA.  

This technical memorandum refers to the Rosemont Copper Technical Memorandum dated May 6, 2011, and the referenced Doc# 049/11-15.3.2. In that document, Rosemont Copper and TetraTech respond to...

May 23, 2011

 
Tetra Tech provided acceptable responses to all questions with the exception of two items listed.

May 18, 2011

Rosemont Copper Company (Rosemont) received review comments on both the Montgomery & Associates (M&A) and Tetra Tech groundwater flow models in a letter titled “Groundwater Modeling...

May 13, 2011

 
Response to the May 5, 2011 Technical Memorandum prepared by SRK Consulting titled Rosemont Pit Lake...

 
Tetra Tech's response to review comments on the pit lake...

May 6, 2011

 
This tech memo is in response to the April 5, 2011 tech memo prepared by Golder Associates titled Review of "Rosemont Site Water Management Update Review Responses".

 
FS/BLM comments are restated in Section 2.0 and followed by responses.  Only responses pertinent to Tetra Tech are provided in this tech memo.

April 22, 2011

 
A technical reviw of "Infiltration, Seepage...

A technical review of “Infiltration, ...

April 12, 2011

 
This tech memo presents revised Fate and Transport modeling of the proposed Rosemont Copper Project Heap Leach...

April 11, 2011

During post-submittal review of the Rosemont Mine model submitted in 2010, Montgomery & Associates (M&A) determined that precipitation...

April 6, 2011

 
This memo reviews the internal technical consistency of the:  Tetra Tech numerical groundwater models (Steady-State, Mining Phase, and Post Closure models) and the Tetra Tech...

April 5, 2011

 
This memo provides additional comments to Tetra Tech's reponses to Golder's review on November 30, 2010.

March 31, 2011

 
The comments in the present review are grouped into two topics: (1) pit lake...

March 8, 2011

The technical memorandum titled Rosemont Flow-Through Drain Design Summary (Tetra Tech, 2010d) was prepared in response to the April 14, 2010 Comprehensive Request for Additional Information from...

January 13, 2011

This memorandum provides a technical review of the full version of the report Regional Groundwater Flow Model Rosemont Copper Project (Tetra Tech, 2010i) dated November 2010. This review was...

January 1, 2011

Rosemont Copper has recently revised its numerical groundwater model, completed by Errol L. Montgomery and Associates, and has also had Tetra Tech complete a new groundwater model in support of...

December 1, 2010

 
Overview of water usage in copper mining in Arizona.

November 30, 2010

 
The purpose of this report is to provide a brief review that addresses in a general manner the potential for Rosemont using the alternative water sources identified by the CNF. ...

This tech memo provides responses to the review comments provided to Rosemont Copper Company on the Site Water Management Update report prepared by Tetra Tech.

November 23, 2010

 
This tech memo presents responses to the specific comments by SRK and Tetra Tech's revisions included in the updated report.

November 17, 2010

November 16, 2010

This tech memo provides a response to SRK's comments.

November 12, 2010

This addendum includes additional explanation and analysis for the groundwater flow model used to simulate impacts of water supply pumping for the Rosemont mine as part of an EIS.

September 27, 2010

September 15, 2010

This tech memo provides a summary of Tetra Tech's findings related to the infiltration (recharge) of stormwater runoff...

This tech memo summarizes the stormwater control features anticipated for the Expanded Barrel Only Alternative associated with the proposed Rosemont Copper Project in Pima County Arizona.

September 10, 2010

This tech memo presents a Stormwater Assesment for the Expanded Barrel Only Alternative being considered in the US Forest Service EIS for the proposed Rosemont Copper Project.

August 31, 2010

This tech memo is in response to April 14, 2010 Comprehensive Request for Additional Information from ADEQ.

This tech memo provides information related to the flow-through drain system that is proposed as part of the Rosemont Copper Project.

 
This tech memo provides estimates of sediment...

This tech memo summarizes the results of a groundwater flow modeling effort prepared by Tetra Tech for the proposed Rosemont Copper Project.

Provides information related to the Heap Leach...

This tech memo provides an analysis of the BADCT alternatives for the Settling Basin at the Rosemont Copper Project.

This tech memo provides a Waste Rock...

August 30, 2010

This tech memo serves as a transmittal of an updated Infiltration, Seepage...

In addition to the tailings...

August 27, 2010

This tech memo addresses design and drawing revisions that have occurred since the preparation of the report titled "Process Water...

August 26, 2010

This tech memo summarizes the protocol and test results performed in support of the Rosemont Heap Leach...

August 24, 2010

This Tech Memo summarizes the results of a predictive pit lake...

 
The following technical review has been prepared to review the underlying assumptions contained within this study and to assess the conclusions of the study.

August 23, 2010

This tech memo provides estimated source volumes and chemical makeup for the following facilities for use, as needed, in the area-wide fate and transport modeling work associated with the Rosemont...

This tech memo provides estimated depth to groundwater from existing ground and/or facility bottom elevations based on the updated locations of those facilities regulated under the APP program.

August 20, 2010

This tech memo supersedes any previous liner leakage...

This tech memo supesedes any previous liner leakage...

This tech memo documents the durability of the overliner drain fill planned for use as part of the Heap Leach...

August 18, 2010

This tech memo provides an updated layout of the facilities at the Rosemont Copper Project.

August 17, 2010

 
This memo provides a technical review of the two Technical Memoranda, Groundwater Flow Model Construction and Calibration and Steady-State Sensitivity Analyses.

 
This Technical Memorandum presents the sensitivity analyses performed on the groundwater flow models prepared by Tetra Tech for the proposed Rosemont Copper Project.

August 14, 2010

This tech memo summarizes the methods and computations employed to estimate the capacity of the Phase 2 Heap Leach...

August 13, 2010

This tech memo documents the estimated deflection of the solution collection pipes related to the Heap Leach...

August 11, 2010

This tech memo provides a summary of Tetra Tech's anchor trench stability analysis related to the Heap Leach...

Provides a summary of Tetra Tech's settlement analysis related to the Heap Leach...

August 10, 2010

Presents supporting design information related to the leachate collection piping layout for the Heap Leach...

August 5, 2010

Golder Associates (Golder) conducted a review of the Site Water Management Update for the Rosemont Copper Project (April 2010, Tetra Tech). The Site Water Management Update is presented in five...

August 3, 2010

This tech memo provides an updated volume requirement for the planned Raffinate...

 
This tech memo was prepared to provide comments related to the review of the following report: Davidson Canyon Hydrogeologic Conceptual Modle and Assessment of Spring Impacts,...

August 2, 2010

 
This tech memo provides a technical review of Hydraulic Property Estimates (Tetra Tech, 2010).

July 30, 2010

 
This memo provides a technical review of the tech memo Hydrogeologic Framework Model (Tetra Tech, 2010)

July 9, 2010

Tetra Tech's groundwater flow modeling team has evaluated short-term aquifer...

May 11, 2010

Provided here are comments related to the review of the following two reports: (a) Davidson Canyon Hydrogeologic Conceptual Model and Assessment of Spring Impacts, Rosemont Copper Project (Tetra...

May 7, 2010

SRK evaluated each ACD for technical and practical feasibility on the basis of expert professional judgment and knowledge of the specific scientific and engineering aspects of the alternative....

April 6, 2010

This tech memo discusses select stormwater components associated with the design of the Heap Leach...

April 5, 2010

This tech memo discusses stormwater management for the final reclaimed surface of the Dry Stack Tailings...

This tech memo provides Tetra Tech's design analysis related to the use of flow-through drains at the proposed Rosemont Copper Project.

This tech memo discusses the design and sizing of the flow-through drains associated with the base concept of the Rosemont Ridge Landform at the proposed Rosemont Copper Project.

Revised tech memo regarding Tetra Tech's findings related to the infiltration of stormwater runoff...

This tech memo discusses the hydrologic and hydraulic calculations performed for the Pit Diversion Channel...

April 2, 2010

This tech memo describes the hydrologic & hydraulic methodology used to manage and control storm runoff...

This report addresses the detailed engineering of the Dry Stack Tailings...

This tech memo discusses stormwater management and the design of detention ponds and stormwater conveyance channels for the final reclaimed surface of the Waste Rock...

April 1, 2010

This report further develops the key site water management structures planned for the Rosemont Copper Project designed to protect the environment and Project facilities. This update is specific...

March 31, 2010

This tech memo presents a Stormwater Assessment of the Scholefield Tailings...

March 15, 2010

This tech memo documents the Prescriptive BADCT closure recommendations for the lined facilities associated with the proposed Rosemont Copper Project.

March 9, 2010

 
This information is preliminary and provided for use in alterntive visual analysis associated with the Rosemont Copper Project.

March 5, 2010

This tech memo presents a Stormwater Assessment for the Barrel and McCleary Alternative being considered in the US Forest Service EIS for the proposed Rosemont Copper Project. This analysis...

Cited by Tetra Tech in 012430. (R-326)

This tech memo presents a Stormwater Assessment for the Mine Plan of Operations...

This tech memo presents a Stormwater Assessment for the Partial Backfill Alternative being considered in the US Forest Service EIS for the proposed Rosemont Copper Project. This analysis...

This tech memo provides a summary of Tetra Tech's findings related to predicted post-mining regulatory (100-year) hydrology and average-annual runoff...

This tech memo presents a Stormwater Assessment for the Scholefield Tailings...

This tech memo presents a Stormwater Assessment for the Sycamore Tailings...

March 4, 2010

This tech memo provides a summary of Tetra Tech's findings related to predicted baseline regulatory (100-year) hydrology and average-annual runoff...

March 1, 2010

This tech memo compares the natural groundwater fluctuations of the system near the Rosemont property with the drawdown predicted by the hydrogeologic model.

WestLand has completed a preliminary jurisdictional determination pursuant to USACOE Regulatory Guidance Letter 08-02, of areas that may be considered by the ACOE as potential waters of the United...

February 9, 2010

 
This review has been undertaken at the request of SWCA and the CNF. This memo provides comments related to a review of the report, Groundwater Flow Modeling Conducted for Simulation...

January 28, 2010

This tech memo discusses the design of stormwater conveyance channels associated with the Dry Stack Tailings...

January 27, 2010

This tech memo discusses the selection of the hydrologic methodology/design storm criteria applied to the proposed Rosemont Copper Project.

January 1, 2010

This tech memo presents a Stormwater Assessment for the Barrel Only Alternative being considered in the US Forest Service EIS for the proposed Rosemont Copper Project. This analysis quantifies the...

A description of the hydrologic dynamics and key physical processess that are governing groundwater-surface water interactions in Davidson Canyon which includes a discussion on springs and their...

Upon cessation of mining, the local water table...

This report presents an update to the February 2010 Geochemical...

This investigation evaluates the environmental consequences of developing the Rosemont deposit, with a focus on the potential to impact...

This report presents the results of the infiltration and ...

This report presents the results of a regional groundwater flow model developed for the Rosemont project. This geologically based, numerical flow model predicts the formation of a pit-lake within...

The groundwater flow model was designed to simulate conditions prior to pit development, during pit dewatering...

This tech memo provides a comparison for the stormwater monitoring data and Synthetic Precipitation Leaching...

This Tech Memo provides an update on the status of the sensitivity analyses performed to date on the groundwater flow models prepared by Tetra Tech for the proposed Rosemont Copper Project (...

December 4, 2009

 
This memo presents the findings of MWH's review of the development and simulation results of the numerical groundwater flow model for Rosemont Copper 

September 10, 2009

This memo discusses the methodology behind the estimation of the Local and General Probable Maximum Precipitation (PMP) storm distributions for the Rosemont Copper Project.

August 26, 2009

This report documents the technical performance of a transmission plan of service proposed by Rosemont.

July 1, 2009

This report presents updated recommendations for the water supply facilities and project design criteria. Recommendations and design criteria are conceptual and should not be considered final.

May 21, 2009

Additional investigations for the Phase 2 hydrogeologic characterization program for the proposed Rosemont mine, included a long-term multi-well aquifer...

May 5, 2009

The objectives of this memo are to address questions related to acid rock drainage...

May 4, 2009

This technical memorandum has been prepared to demonstrate the Best Available Demonstrated Control Technology...

This tech memo presents the leach pad drain pipe sizing results for the Phase 1 and Phase 2 Heap Leach...

May 1, 2009

This report discusses the design of the Process Water...

April 29, 2009

This memo provides the potential volume of stormwater run-off that will be captured by the Heap Leach...

April 24, 2009

January 20, 2009

The purpose of this memo is to document the calculations used to evaluate the level of engineering control achieved for various liner systems as part of the BADCT analysis for APP regulated...

January 1, 2009

This report presents information and supporting documentation required for an area-wide APP application for the Rosemont Copper Project.

Montgomery & Associates developed a groundwater flow model designed to simulate conditions prior to pit development, during pit dewatering...

Montgomery & Associates conducted groundwater flow modeling investigations for simulation of mine supply groundwater pumping from proposed locations near Sahuarita.  Investigations...

WestLand has completed a preliminary jurisdictional determination pursuant to USACOE Regulatory Guidance Letter 08-02, of areas that may be considered by the ACOE as potential waters of the United...

In accordance with the Phase 2 hydrogeologic characterization program for the proposed Rosemont Mine, 27 groundwater wells and 3 multi-level groundwater piezometers were constructed in the...

This memo was developed to solidify various design criteria for use at the Rosemont Copper Project site by various consulting groups. The goal of this analysis was to review info generated from...

This tech memo describes updates to the Arizona Department of Water Resources (ADWR) Tucson Active Management Area Model in the vicinity of Sahuarita and Green Valley.

December 1, 2008

This tech memo describes updates to the Arizona Department of Water Resources (ADWR) Tucson Active Management Area Model in the vicinity of Sahuarita and Green Valley.

February 13, 2008

This memo describes current plans for implementation of the groundwater monitoring program for the Rosemont Project.

December 3, 2007

A preliminary evaluation of springs within the Rosemont Project Area has been completed by Errol L. Montgomery & Associates.

November 28, 2007

This memo summarizes the hydrologic analysis performed for the area along the north and south perimeter of the Rosemont Ridge Landform. This analysis was done in order to assess the potential...

November 19, 2007

Forest Service requested data related to stream channels and flow characteristics near the Compliance Point Dam. In response to FS, field data, observations and a basic hydrographic survey of the...

July 25, 2007

June 12, 2007

This memo presents the results of liquefaction and slope...

June 1, 2007

Presents groundwater protection concepts.

April 27, 2007

June 2, 2006

Summarizes the sizing of the lined freshwater and contingency ponds and the unlined stormwater pond for the Rosemont Mine Siting Study.

January 1, 2004

This guidance manual describes the process that an...

This report summarizes meteorological measurements collected at the Rosemont Copper Mine monitoring stations. The Rosemont Copper Mine is a new open pit copper mine proposed by Augusta Resource...