Consulting

Mining of metals is one of the key activities that support economical development of our society. In this context, solution mining has become an increasingly relevant industrial process. An economically efficient leaching process relies on three fundamental disciplines geology, metallurgy and hydrodynamics. The tools developed by HGS are especially well suited to generate the information necessary for the improved design, operation and closure of a leaching process.

HGS’ personnel have successfully completed a number of projects involving design, operational improvement, secondary recovery of metals and closure of solution mining facilities. The list below provides summary of the typical projects executed by HGS’ personnel.

Item	Client	Mine/Project Site	Type of Facilty	Project Purpose
1	Barrick Mercur, Utah	Mercur mine	Tailing impoundment	Closure
2	Codelco - Division Norte, Chile	Chuquicamata	Heap leach	Troubleshooting & optimization
3	Arizona Electric Power, Arizona	Cholla Plant	Flyash pond	Closure
4	Magma Copper, Arizona	Florence Project	In situ leaching	Ore Characterization
5	Cyprus-Amax, Nevada	Sleeper mine	Tailing impoundment	Closure
6	Cyprus-Amax, Nevada	Sleeper mine	Heap leach	Closure
7	Lassen Gold Mining, California	Hayden Hill mine	Heap leach	Closure
8	Cyprus Miami Corporation, Arizona	Miami mine	Waste dump	Ore Characterization
9	ERM-Rogers Landfill, Mississippi	Rogers Landfill	Landfill	Closure
10	Equatorial Tonopah Inc., Nevada	Tonopah Mine	Heap leach	Troubleshooting
11	Newmont Gold Mining, Nevada	Hollister Mine	Heap leach	Closure
12	Wind Mountain Mining, Nevada	Wind Mountain mine	Heap leach	Closure
13	Mantos de Oro Mining, Chile	Chimberos project	Waste dump	Design
14	Barrick Bullfrog, Nevada	Bullfrog mine	Tailing impoundment	Closure
15	Lassen Gold Mining, California	Hayden Hill mine	Tailing impoundment	Closure
16	Phelps Dodge Corporation, Arizona	Miami mine	Waste dump	Ore Characterization
17	Thompson Creek Mining, Idaho	Thompson Creek	Tailing impoundment	Design
18	Barrick Mining, Nevada	Ruby Hill	Heap leach	Closure
19	Barrick � Homestake, South Dakota	Homestake	Waste dump	Closure
20	Barrick Bullfrog, Nevada	Bullfrog mine	Waste dump	Closure
21	Placer Dome, Nevada	Bald Mountain	Waste dump/Heap leach	Closure
22	Newmont Gold Mining, Bolivia	Coricollo mine	Waste dump	Closure
23	Rayrock Mining, Nevada	Dee Gold mine	Tailing impoundment	Ore Characterization
24	Independence Mining, Nevada	Jerritt Canyon	Tailing impoundment	Ore Characterization
25	Cominco Metals, Alaska	Red Dog mine	Tailing impoundment	Ore Characterization
26	Independence Mining, Nevada	Big Springs mine	Tailing impoundment/Heap leach characterization	Closure
27	Homestake Mining, Nevada	Prebble mine	Tailing impoundment/Heap leach	Closure
28	Placer Dome, Mexico	Mulatos project	Waste dump design	Design
29	Coeur d�Alene Mines, New Zealand	Golden Cross	Waste dump design	Design
30	Phelps Dodge Corporation, Arizona	Tyrone	Leach Dump	Optimization
31	Phelps Dodge Corporation, Arizona	Bisbee	Waste Dump	Closure
32	Broken Hill Proprietary, Chile	Minera Escondida	ROM leach demonstration heap	Ore Characterization & Modeling
33	Phelps Dodge Corporation, Peru	Cerro Verde	Heap leach	Ore Characterization
34	Placer Dome, Nevada	Cortez	Heap leach	Ore Characterization
35	Phelps Dodge Corporation, Arizona	Process Technology Center	Heap leach technology	Tech. Development
36	Teck-Cominco Research Center	Confidential	Heap leach	Optimization
37	Placer Dome, Chile	Zaldivar	Heap leach	Ore Characterization & Troubleshooting
38	Broken Hill Proprietary, Chile	Minera Escondida Norte	ROM leach operation	Ore Characterization
39	Coeur Rochester, Nevada	Coeur Rechester	Heap leach operation	Optimization
40	Division Chuquicamata, Codelco	Chuquicamata	Waste Dump - In situ leaching initial characterization and design	Design & Implementation
41	BetzDearborn, USA	Research office	Testing of agglomerating aid	Optimization
42	AMT, USA	Old Reliable	Waste Dump	System Design & Closure
43	Placer Dome, USA	Confidential	In situ leaching scooping evaluation	Process Design
44	Phelps Dodge Corporation, Arizona	Process Technology Center	Heap leach - solution inventory	Tech. Development
45	PAN Australia	Puthep proyect	Heap leach design	Characterization & Optimization
46	Aur Resources, Chile	Quebrada Blanca	Heap leach	Optimization
47	Barrick, USA	Ruby Hill	Heap leach	Closure
48	Anglo American, USA	CC&V	Heap leach	Ore Characterization
49	Phelps Dodge Corporation, N.M.	Chino	ROM Dump	Ore Characterization
50	Placer Dome, Canada	Research Center	Leaching of Carbonaceous Ore	Ore Characterization
51	Broken Hill Proprietary, Chile	Minera Escondida Norte	Development of heap-flow model	Tech. Development
52	Phelps Dodge Corporation, AZ	Sierrita	Tailing impoundment	Material Characterization
53	Equatorial Tonopah Inc., Nevada	Tonopah	Post-mortem of Heap leach operation	Litigation & Closure
54	Minera Dayton, Chile	Anadacollo	Heap leach	Closure
55	Phelps Dodge, Arizona	Morenci	Heap leach	Ore Characterization
56	Minera Maricunga Bema/Kinross, Chile	Refugio	Heap leach	Closure
57	Codelco - Division Andina, Chile	Andina	Waste Dump	Design for FS
58	Copper Co Ltd, Australia	Ladie Annie	Heap leach	Design for DFS
59	Broken Hill Proprietary, Chile	Minera Spence	Heap leach	Ore Characterization
60	Chesapeake Gold Corp., USA	Confidential	Heap leach	Ore Characterization for DFS
61	Minara Resources, Australia	Murrin Murrin	Heap leach design	Ore Characterization for DFS
62	Minara Resources, Australia	Murrin Murrin	Heap leach	Monitoring & Optimization
63	Grupo Frisco, S.A., Mexico	Minera Maria	Heap leach	Ore Characterization
64	Minera Penmont, S.A., Mexico	La Herradura	Heap leach	Ore Characterization
65	Freeport McMoRan, USA	Tohono	Heap leach	Secondary Cu Recovery
66	Freeport McMoRan, USA	Morenci	ROM leach operation	Process Monitoring
67	Asarco LLC, USA	Ray	Heap leach	Optimization
68	Western Copper Corporation, Canada	Carmacks	Heap leach	Conceptual Closure
69	Broken Hill Proprietary, Chile	Spence	Heap leach	Ore Characterization
70	Finders Resources Ltd, Indonesia	Wetar	Heap leach	Ore Characterization for DFS
71	QuadraFNX Mining Ltd.	Carlota	Heap leach	Troubleshooting & characterization
72	Freeport McMoRan, USA	Safford	Heap leach	Troubleshooting & characterization
73	GeoBiotics LLC	Quebrada Blanca	Bioleaching	Characterization & Monitoring
74	Rio Tinto, USA	Capitol Castings	Bioremediation	Characterization & Monitoring
75	South American Silver Corporation	Malku Khota	Heap leach	Ore Characterization
76	Western Copper Corporation, Canada	Carmacks	Heap leach	Ore characterization & Design
77	Rio Tinto, Australia	Ranger	Heap leach	Ore characterization & monitoring
78	Rio Tinto, Australia	Rossing	Heap leach	Process review
79	Rio Tinto, USA	Kennecott Utah Copper	Heap leach demonstration facility	Ore Characterization
80	Rio Tinto, USA	Kennecott Utah Copper	Heap leach demonstration facility	HL Process Monitoring
81	Rio Tinto, Australia	La Granja	Heap leach	Ore Characterization and HL design
82	Rio Tinto, Australia	La Granja	Heap leach	Process Monitoring
83	Sandfire Resources NL	DeGrussa	Heap leach	Ore Characterization and HL design
84	Mintek	Hydrodynamic Lab	Heap leach	Ore Characterization
85	Mintek	Various	Heap leach	Ore Characterization & Design
86	Freeport McMoRan, USA	Safford Tech. Center	Heap leach	Ore Characterization
87	Rio Tinto, Technology and Innovation	Bundoora T&I	Heap leach	Ore Characterization
88	Talvivaara Mining Company	Talvivaara	Heap leach	Ore Characterization
89	Do�a Ines de Collahuasi	Collahusi	Heap leach	Ore Characterization
90	Cobre del Mayo, SA de CV	Piedras Verdes	Heap leach	Ore Characterization
91	NewGold	Cerro San Pedro	Heap leach	ER Tomography & Sec.Au Recovery
92	Rio Tinto, USA	Kennecott Utah Copper	Heap leach	Pilot Test Heap
93	Rio Tinto, USA	Kennecott Utah Copper	Heap leach	ER Tomography
94	Cobre del Mayo, SA de CV	Piedras Verdes	Heap leach	ER Tomography & Sec. Cu Recovery