Water Resources

July 27, 2016

U.S. EPA Contract No. GS-10F-0210U, Task Order 43 EP-G149-00241, “Technical Review Support / Analysis of conceptual design for ephemeral channel...

June 13, 2016

WET has been contracted by Rosemont to provide this response to the technical memorandum produced by Dr. Mathias Kondolf and James Ashby for Robert Leidy of the EPA. On October 30, 2014 WET met...

May 10, 2016

This document constitutes new information available to the Coronado National Forest and as such it will be assessed as appropriate in a Supplemental Information Report (SIR) as required under FSH...

May 6, 2016

The Center for Biological Diversity (CBD) contacted Integrated Hydro Systems, LLC and requested Robert Prucha review available studies and evaluate assess potential impacts of the proposed...

April 19, 2016

Via a letter dated December 17, 2015, Pima County Administrator Chuck Huckleberry transmitted to the U.S. Environmental Protection Agency (EPA) a memorandum by Powell et al. (2015) providing...

February 16, 2016

During meetings between the Coronado National Forest, U.S. Fish & Wildlife Service (USFWS), WestLand Resources, Inc. (WestLand), SWCA, and Rosemont Copper Company on February 9, 2016, there...

March 31, 2015

The WO Groundwater Team was asked to assist the Coronado NF in evaluating the efficacy of performing additional groundwater modeling tasks for the Rosemont Mine project as suggested by the USGS,...

March 20, 2015

During a meeting on March 9, 2015, the USGS raised verbal concerns about the range of the sensitivity analysis used for storage properties in the Rosemont groundwater models. Storage properties...

March 15, 2015

Topics Discussed:

  • Discussion of USGS comments from February 4, 2015 letter
  • Discussion by additional USGS suggestions for evaluation model uncertainty

March 4, 2015

Between November 17 and December 2, 2014, SWCA undertook field data collection efforts on Cienega...

Between approximately 2000 and 2002, the Arizona Department of Environmental Quality undertook a survey of the physical integrity of Cienega...

February 18, 2015

As part of coordination activities with other federal agencies between May and November 2014, various methods of analysis were discussed and reviewed that might be applicable to analyzing impacts...

February 11, 2015

Additional water quality information was submitted by Rosemont Copper Company to the Coronado National Forest on January 17, 2015, representing the most complete database of groundwater quality...

February 4, 2015

As requested by the U.S. Forest Service (USFS), the U.S. Geological Survey (USGS) has performed a peer review of the documentation of a series of tests on the possible effects of selected boundary...

February 3, 2015

This State Water Quality Certification (Certification) is issued by the Arizona Department of Environmental Quality (ADEQ) under the authority of Section 401(a) of the federal Clean Water Act (CWA...

February 1, 2015

The application for the Clean Water Act (CWA) Section 404 permit, as submitted, involves discharge of fill material into Barrel Canyon and associated tributaries including Wasp Canyon, McCleary...

January 16, 2015

Attached are the following pdf files for the US Forest Service review:

  • Precipitation (rain) samples – stable isotopes of oxygen and hydrogen, from 12/2012 to 10/2014
  • ...

January 15, 2015

The analyses presented by SWCA (2013), and included in the Final Environmental Impact Statement...

December 13, 2014

This Technical Memorandum responds to the November 25, 2014, Coronado National Forest (Forest) request for additional information to support the Supplemental Biological Assessment. Drawdown...

December 10, 2014

Enclosed find a location map and hydrographs of projected groundwater level drawdown through 1,000 years post-mining at nine locations requested in a November 25, 2014 letter from the Coronado...

September 30, 2014

As requested, our hydrologists Stan Leake, Jesse Dickinson, Don Pool have conducted a technical review of Hydro-Logic Technical Memorandum "Simulated Empire Gulch Spring Discharge and Stream...

As requested, our hydrologists Stan Leake, Jesse Dickinson, Don Pool, and Nick Paretti have conducted a technical review of Pima County report "Impacts of the Rosemont Mine on Hydrology and...

As requested, our hydrologists Stan Leake, Jesse Dickinson, Don Pool, and Nick Paretti have conducted a technical review of SWCA draft memorandum "Refined approaches to streamflow predictions...

As requested, our hydrologists Stan Leake, Jesse Dickinson, Don Pool, and Nick Paretti have conducted a technical review of WestLand Resources report "Rosemont Copper Project: Potential...

September 14, 2014

Scientific support for complex management decisions involving water use and impacts to aquatic systems requires a better understanding of critical instream flow and habitat...

July 24, 2014

The focus of this Technical Memorandum, however, is Upper Empire Gulch Spring and whether or not there is evidence of hydraulic connectivity to the regional aquifer...

July 22, 2014

In October 2013, the Coronado National Forest and Environmental Protection Agency (EPA) collaborated on a revised approach for disclosing streamflow and riparian impacts that could result from the...

July 14, 2014

If constructed, the Rosemont mine will reduce streamflow and groundwater inputs into...

July 9, 2014

Empire Gulch is a tributary to...

June 27, 2014

The U.S. Forest Service (USFS) developed a model (referred to hereafter as the October 2013 Model) to attempt to quantify the impact...

This Technical Memorandum is provided in response to the U.S. Forest Service (USFS) Hydrology Working Group meeting on June 10-11, 2014. The USFS requested that Rosemont Copper modify the Tetra...

The focus of this Technical Memorandum, however, is Upper Empire Gulch Spring and whether or not there is evidence of hydraulic connectivity to the regional aquifer...

June 25, 2014

The Forest Service used analyses by SWCA (2013) to complete a risk analysis of the potential for drawdown to increase the length of dry stream in the upper Cienega...

June 23, 2014

The BLM provided a tour of aquatic resources for the USFWS, Ecological Services on Empire Spring and...

June 18, 2014

In June 2014, the Forest Supervisor indicated to the U.S. Fish and Wildlife Service his intention to reinitiate Section 7 consultation. The Forest Supervisor then convened a group of cooperating...

June 17, 2014

Cover only - electronic media file

June 6, 2014

The USFS developed a model (referred to hereafter as the October 2013 Model) to attempt to quantify the impact...

April 8, 2014

On October 29, 2013, Mindy Vogel (Coronado National Forest Project Manager) requested by email any further available hydrologic information for Empire Gulch. This request was sent to the EPA, BLM...

January 31, 2014

EPA Contract No. GS-1OF-0210U, Task Order 8 EP-G149-00202, Arizona Water Rights Analysis, requests the development of a Technical Memo providing an overview of Arizona water rights law, including...

January 6, 2014

This document describes the environmental monitoring data that were received from the Barrel Canyon and Davidson Canyon instrumentation stations. The purpose of this report is to provide a summary...

November 4, 2013

Various water data for Las Cienegas National Conservation Area, including:

  • Raingage data
  • Groundwater and well data
  • Photos of Empire Gulch
  • ...

August 30, 2013

Public comments were received on the Draft EIS, as well as on the Preliminary Administrative FEIS that was distributed to the cooperating agencies on July 1, 2013, concerning various aspects of...

August 29, 2013

Public comments were received on the Preliminary Administrative FEIS that was distributed to the cooperating agencies on July 1, 2013, concerning the analysis of impacts to riparian areas and...

August 25, 2013

A Preliminary Administrative FEIS was distributed to the cooperating agencies on July 1, 2013. Comments were received from both U.S. Environmental Protection Agency (USEPA) and the Arizona...

August 23, 2013

Public comments were received on the Draft EIS, as well as on the Preliminary Administrative FEIS that was distributed to the cooperating agencies on July 1, 2013, concerning the use of the 200-...

July 1, 2013

This Stormwater Pollution Prevention Plan (SWPPP) is for the Rosemont Copper Project (Project) mining operation and covers exploration, construction, operational, and...

June 26, 2013

The purpose of this memo is to estimate the approximate amount of explosive residue that may be present at the site, to roughly estimate the concentrations that could occur in stormwater...

April 5, 2013

The purpose of this memo is to estimate the amount and phasing of stormwater reductions during operations of the mine. All surface water modeling conducted by Rosemont has been for post-closure...

January 11, 2013

This Technical Memorandum was prepared in response to an October 18, 2012 meeting between Rosemont Copper Company, the Coronado National Forest (Forest), and various other government agencies and...

December 26, 2012

The purpose of this memo is to document hydrographs reviewed for several wells located along...

The purpose of this memo is to document the method used to estimate post-mine flow in Davidson Canyon at the confluence with...

December 1, 2012

Spanning parts of the seven states of Arizona, California, Colorado, New Mexico, Nevada, Utah, and Wyoming (Basin States), the Colorado River Basin (Basin) is one of the most critical sources of...

November 12, 2012

This document presents proposed conservation measures developed by Rosemont Copper Company (Rosemont) to address potential impacts of the proposed Rosemont Copper Project on water features in the...

September 21, 2012

In semiarid climates, a

September 19, 2012

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...

August 8, 2012

The purpose of this memo is to provide professional opinions on action items generated during a specialist panel discussion with CNF held May 3, 2012 related to surface water located at some...

July 18, 2012

SRK reviewed Montgomery & Associates (M&A) and Tetra Tech (TT) groundwater modeling Technical Memoranda and draft and final reports, met at various times with the M&A modeling staff,...

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 10, 2012

The purpose of this letter is to provide additional information concerning possible modifications to the Barrel (Preferred) Alternative. In short, Rosemont has determined that although the Barrel...

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...

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...

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 ...

In 1986, the Ford Foundation touted the Arizona Groundwater Management Act for its innovative approach to water management. Thirty-one years after the Act’s passage, Arizona‘s water-...

March 30, 2012

The purpose of this Davidson Canyon Conceptual Groundwater Monitoring Plan (Plan) is to recommend additional monitoring locations and data collection that can be used to assist in predicting and...

March 15, 2012

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

March 2, 2012

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

January 1, 2012

Groundwater provides drinking water for millions of Americans and is the primary source of water to irrigate cropland in many of the Nation’s most productive agricultural regions....

Comparison of projected future water demand and supply across the conterminous United States indicates that, due to improving efficiency in water use, expected increases in population and economic...

The Forest Service has released the first national ...

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,...

September 7, 2011

August 19, 2011

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...

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

July 1, 2011

The U.S. Department of Agriculture (USDA) Strategic Plan for fiscal year (FY) 2010–2015 targets the restoration of...

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 proposed Rosemont Copper Company (Rosemont) operation will require approximately 3,800 gallons per minute (gpm) (6,132...

 
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.

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...

April 22, 2011

 
A technical reviw of "Infiltration, Seepage...

April 14, 2011

A technical review has been undertaken and this Technical Memorandum prepared at the request of SWCA and the Coronado National Forest, in accordance with a request for a Statement of Work dated...

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...

February 14, 2011

A technical review has been undertaken and this Technical Memorandum prepared at the request of SWCA and the Coronado National Forest, in accordance with a request for a Statement of Work dated...

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...

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

Considering environmental water needs alongside human demands is an emerging paradigm in water policy. The science of environmental water needs (or e‐flows) is ever growing and evolving. And yet,...

Determining the best methods for quantifying environmental flow needs depends on what is to be studied as well as how the information will be used. The perspective of the scientist studying the...

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...

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.

November 1, 2010

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

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...

October 22, 2010

This memorandum provides a technical review of the full version of the Montgomery & Associates (M&A) report, Revised Groundwater Flow Modeling Conducted for Simulation of Proposed Rosemont...

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.

August 30, 2010

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

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

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).

August 1, 2010

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

July 30, 2010

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

July 26, 2010

Rosemont Copper Company (Rosemont) is planning the development of an open pit mining and mineral processing operation known as the Rosemont Copper Project (Project) on the east side of the Santa...

July 9, 2010

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

Rosemont Copper Company (Rosemont) is planning the development of an open pit mining and mineral processing operation known as the Rosemont Copper Project (Project) on the east side of the Santa...

July 5, 2010

Groundwater is a key driver of riparian condition on dryland rivers but is in high demand for municipal, industrial, and agricultural uses. Approaches are needed to guide decisions that balance...

July 3, 2010

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 (...

July 1, 2010

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...

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....

May 3, 2010

This memorandum provides a technical review of the report, Geochemical...

April 30, 2010

A technical review has been undertaken, and this Technical Memorandum prepared at the request of SWCA and the Coronado National Forest, in accordance with a request for a Statement of Work dated...

April 21, 2010

The updated groundwater model was used to predict dewatering...

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 to...

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 to...

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 to...

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 to...

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 to...

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...

This Technical Memorandum presents a Stormwater Assessment for the Barrel and McCleary Alternative being considered in the US Forest Se rvice...

This Technical Memorandum presents a Stormwater Assessment for the Barrel Only Alternative being considered in the US Forest Service En vironmental...

This Technical Memorandum presents a Stormwater Assessment for the Scholefield ...

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...

February 1, 2010

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

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

The MODFLOW-SURFACT computer input tiles and Groundwater Vistas (GWVistas) files were also made available for review. There were three file sets available, including SteadyState, Trans_DRN, and...

January 28, 2010

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

January 27, 2010

This technical memorandum discusses the selection of the hydrologic methodology/design storm criteria applied to the proposed Rosemont Copper Project (Project) in Pima County, Arizona. This...

January 1, 2010

At the request of the U.S. Forest Service, an instream flow assessment was conducted at Cherry Creek, Ariz., to investigate...

This Technical Memorandum documents the results of the predictive groundwater flow models prepared by Tetra Tech for the proposed Rosemont Copper Project (Project) located on the east side of the...

While freshwater sustainability is generally defined as the provisioning of water for both people and the environment, in practice it is largely focused only on supplying water to furnish human...

This Technical Memorandum presents a Stormwater Assessment for the...

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...

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

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 

October 28, 2009

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

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 30, 2009

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

April 29, 2009

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

April 27, 2009

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.

April 24, 2009

February 26, 2009

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...

February 1, 2009

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

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

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...

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...

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.

April 1, 2008

The Augusta Resources Corporation proposes to construct the Rosemont Mine project in the northern Santa Rita Mountains. The proposed open pit would cover about 700 acres. Full construction of the...

February 13, 2008

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

January 1, 2008

Approved jurisdictional determinations (JDs) and preliminary JDs are tools used by the U.S. Army Corps of Engineers (Corps) to help implement Section 404 of the Clean Water Act (CWA) and Sections...

This document is one of a series of Regional Supplements to the Corps of Engineers Wetland Delineation Manual, which provides technical guidance and procedures for identifying and delineating...

This report represents a state-of-the-art synthesis of current knowledge of the ecology and hydrology of ephemeral (dry washes) and intermittent streams in the American Southwest, and may have...

December 3, 2007

A preliminary evaluation of springs within the Rosemont Project Area has been completed by Errol L. Montgomery & Associates, Inc. (Montgomery) . The attached three tables and associated figure...

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 20, 2007

Water rights data requested by CNF for MPO.

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...

November 16, 2007

This memo is in response to the U.S. Forest Service’s request for information regarding ...

July 25, 2007

June 12, 2007

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

June 1, 2007

Presents groundwater protection concepts.

Intent of the Site Water Management Plan is to demonstrate how storm flows and sediment...

May 1, 2007

This technical guide provides guidance for implementing the U.S. Department of Agriculture (USDA) Forest Service national ground water policy. It describes hydrological, geological, and ecological...

April 27, 2007

January 1, 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, 2006

A numerical groundwater flow model of the Tucson Active Management Area (AMA) in Pinal , Pima and Santa Cruz Counties, Arizona , was developed to simulate the regional hydrologic system during a...

February 1, 2005

Davidson Canyon is a rare confluence of desert and riparian...

January 1, 2005

The Las Cienegas National Conservation Area (NCA) is located downstream from the town of Sonoita, Arizona. Sonoita is located in the headwaters of three watersheds - Cienega Creek, Sonoita Creek,...

Ground-water and surfaceflow depletions are altering riparian ecosystems throughout the southwestern United States, and have contributed to the decline of forests of the pioneer trees Populus...

A constant and assured supply of fresh water is critical to sustain ourselves, our communities, and our Nation. While true, this traditional approach, that water is for human use, is no longer...

November 1, 2004

This document provides guidance to States and Tribes authorized to establish water quality standards under the Clean Water Act (CWA) to protect aquatic life from toxic effects of selenium. Under...

September 28, 2004

August 5, 2004

In deciding whether a waterbody that is physically far-removed from a traditionally navigable water should fall under the...

January 1, 2004

This guidance manual describes the process that an...

The objectives of this study were to develop and use a linked groundwater and vegetation model to simulate groundwater and vegetation distributions in a riverine and reservoir-fringe system under...

November 1, 2003

The purpose of this study was to determine the relative contribution of Davidson Canyon to base flows in...

January 1, 2001

In the western United States, many native riparian forests are declining downstream from dams and diversions, primarily due to a lack of successful regeneration of native species. Conceptual...

January 1, 1996

Groundwater depletion threatens many riparian ecosystems in arid and semi-arid regions of the world. The aquifer...

Most commercial explosives contain from 70% to 94% (by weight) ammonium nitrate. When some of the explosives end up in shot rock and...

January 1, 1995

Water quality regulations currently in place in Canada and the USA include criteria for allowable nitrate concentrations in mine effluent. These regulations extend not only to operating mines but...

November 28, 1990

This report presents data supporting designation of a portion of...

January 1, 1988

Nutrients are environmental substances (elements or compounds) necessary for the growth and development of plants and animal s. Nitrogen, phosphorus, and sulphur are found i n varying proportions...

January 1, 1978

Hydrological aspects of the Rosemont environmental study comprise both surface and ground waters which might be affected by mining activity. Such factors as drainage basin size, orientation,...

July 7, 1975

Preliminary conclusions on the character and potential productivity of water from the groundwater reservoir underlying the Empire Ranch lands are based on the hydrological data and analyses of...

October 1, 1968

The material that follows is suggested for use in the evaluation of...

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...