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The USDA Forest Service (USFS) and the Confederated Tribes of the Umatilla Indian Reservation (CTUIR) worked together to rehabilitate 2.1 miles of Clear Creek floodplain, a tributary of the North Fork John Day River Basin. Dredge tailing were deposited from mining operations on Clear Creek's floodplain from the 1930's to the 1950's. These tailing confined the stream channel and degraded the floodplain. The work was completed by moving dredge tailing piles adjacent to the Clear Creek channel, using track-mounted excavators and dump trucks. A caterpillar tractor was used to contour the material placed outside the immediate floodplain, blending it into the hillside. The restored floodplain was very near channel bankfull level following excavation and contoured to accept future flood flows. Monitoring was initiated through pre and post-project photo points and cross-section measurements. Work was completed in two efforts. In 1997 and 1998 floodplain restoration was adjacent to the reconstruction of Road 13 from the junction with Road 10 from Clear Creek River Mile 1.9 to 3.1 for a distance of 1.2 miles. In 1999 the Environmental Assessment for Lower Clear Creek--Granite Creek Floodplain Restoration Project was completed for work proposed on Clear Creek from the mouth up to River mile 1.9 and the Granite Creek floodplain from River miles 5.9 to 7.7. Restoration proposed in the 1999 Environmental Assessment is the subject of this report.

• Cover
• Copyright
• Contents
• Preface
• SESSION 1 Tailings Dam Failures-Lessons Learned from Technical and Governance Realities
• Integrating Tailings Technical and Governance Realities to Better Appreciate System Failures
• Tailings Dam Failures-Acts of Man
• Mount Polley Mine Tailings Spill: Five Years Later
• Lessons Learned from Tailings Dam Failures: A Social, Regulatory, Technical, and Governance Perspective
• SESSION 2 State of Practice
• Cerro Verde Mine and Quebrada Linga Tailings Storage Facility: An Operational Excellence Partnership

• Construction and Operation of Tailings Storage Facilities: The Freeport-McMoRan Perspective
• Using Leading Practices to Disrupt Traditional Operation of a Tailings Storage Facility
• Case Study: Pre-Closure Tailings Management
• SESSION 3 Tailings Governance
• Tailings Dam Failures and Regulatory or Social Response: A Reflection of Lack of Trust?
• Tailings Governance and Management System: Freeport-McMoRan's Perspective
• Tailings Dam Safety Management and Governance Framework at Anglo American
• Tailings Dam Safety and Governance at BHP

• SESSION 4 Tailings Continuum-Selection of the Right Tailings Technology
• Process Considerations for Tailings Dewatering Across the Continuum
• Tailings Facility Design and Advancements in Tailings Technologies
• The Future Is Now
• Recent Developments in Tailings Dewatering Technology
• SESSION 5 The Importance of Culture in Safe Tailings Management
• Some Observations on Cultural Change in Tailings Management
• Integrating Company Culture and the Role of Engineer of Record
• Rio Tinto Tailings Culture
• Freeport-McMoRan's Tailings Stewardship Culture and Case Study
• Index

This book provides summaries of the presentations and discussions at the Mine Tailings: Perspectives for a Changing World symposium, held at the SME 2020 annual conference. It deals with the question of how to best address the risks associated with tailings disposal.

• 1. Mining - The Issues. Introduction. Tailings and waste rock analyses. Disposal. Reclamation. Water recycle. In-plant abatement. Toxicity of effluents. Ongoing research. Concerns of public and legislative bodies. Corporate responsibility. 2. Development of Waste Water Regulations and Guidelines. 3. Influence of the Mining and Mineral Extraction Process. Introduction. Mining. Crushing, grinding, beneficiation and mineralogy. Leaching. Liquid-solids separation. Solution purification and product recovery. Conservation and by-product recovery. Chemistry. Control. 4. Toxicity of Mining and Milling Reagents to the Environment. Introduction. Toxicity of some selected reagents in the milling circuit. Toxicity of some petrochemicals to fish. Reagent biodegradability. Effects of soluble metal-extractant complexes. 5. Tailings Impoundment Selection and Design. Introduction. Tailings and waste rock characteristics. Design of overall treatment system. Impoundment design for tailings. Design for waste dumps. Liners and barriers. 6. Tailings Deposition. Introduction. Deposition methods. 7. Water Management. Criteria. Control of water in the impoundment area. Tailings ponds. Dewatering of tailings. Water recycling and reuse. 8. Monitoring of Tailings Impoundment Site. 9. Sampling and Analysis. Introduction. Sampling. Analyses. Speciation procedure. Analytical techniques for soils. 10. Weathering and Migration Processes. Introduction. Global cycles. Characterization of tailings and waste rock. Hydrogeology influences. Dissolution, precipitation and exchange processes. Eh - pH relationships. Oxidation of sulphides, acid drainage and prevention. Soil development profile. Migration. The ecosystem. Conclusions and summary. 11. Effluent Treatment for Environmental Control. Introduction. Control and prevention of acid mine drainage. Treatment of acidic and other waste waters. Biological and ecological systems. 12. Some Specific Tailings. Decommissioning, Reclamation and Covers. Introduction. Alumina plant tailings. Base metals. Coal. Flotation circuits. Gold. In-situ operations. Iron ore. Oil sands tailings. Phosphate rock. Potash. Sand and gravel. Titanium. Uranium. 13. Decommissioning, Reclamation and Covers. Introduction. Covers. Possible close-out options. Conclusion. 14. Methodology and Plan for Investigating Weathering, Migration and Close-Out - The Model. Introduction. Source terms. The model. Weathering and migration studies. Modelling. Chemical, physical and natural barriers. Examination of tailings and/or waste rock for eventual cover and close-out: summary. 15. Costs of Disposal Options and Management. Introduction. Tailings treatment in mill. Slurry thickening. Slurry transport. Tailings impoundment. Effluent treatment. Effluent transport and/or evaporation. Restoration of tailings area. Sampling and analysis. Evaluation of costs.
• Appendix I. Conversion units. Subject Index.
• (source: Nielsen Book Data)

Environmentally, the past 10-15 years have experienced a very positive approach to improving the quality of effluents discharged from mining and milling processes, and ultimately the quality of seepage from the tailings impoundment area into the environment. This book assembles all the various aspects of the process and of tailings management which have an impact on the environment, thus providing significant examples to help those involved in tailings problems. The text is devoted to the many practical aspects of tailings management - the concerns, the problems, the solutions where knowledge exists, and the presentation of a methodology to examine mine and metallurgical wastes for the ultimate objective of designing the best disposal option for that particular site. Contents: 1. Mining - The Issues. Introduction. Tailings and waste rock analyses. Disposal. Reclamation. Water recycle. In-plant abatement. Toxicity of effluents. Ongoing research. Concerns of public and legislative bodies. Corporate responsibility. 2. Development of Waste Water Regulations and Guidelines. 3. Influence of the Mining and Mineral Extraction Process. Introduction. Mining.
(source: Nielsen Book Data)

• Metals in aquatic and terrestrial systems / A.C.M. Bourg
• Microbiological oxidations of minerals and mine tailings / B.C. Kelley and O.H. Touvinen
• Response of plants and vegetation to mine tailings and dredged materials / W.H.O. Ernst
• Case histories of coastal and marine mines / D.V. Ellis
• Development of dredged material disposal sites / W. van Driel and J.P.J. Nijssen
• Biological assessment of the environmental impact of dredged material / W. Ahlf and M. Munawar
• Soil pollution by metals from mining and smelting activities / T. Asami
• Geochemistry of priority pollutants in anoxic sludges / M. Kersten
• Assessment of metal mobility in dredged material and mine waste by pore water chemistry and solid speciation / U. Förstner and M. Kersten --Diagenetic processes in aquatic mine tailings deposits in British Columbia / T.F. Pedersen and A.J. Losher
• Behaviour of trace metals in a tropical river system affected by mining / J. Jeffery, N. Marshman, and W. Salomons
• Heavy metal transport in streams--field release experiments / B.M. Chapman, D.R. Jones, and R.F. Jung.

• Ch. 1. An Introduction to Deep Sea Tailing Placement / George W. Poling
• Ch. 2. Selection of Subsea Tailing Placement / George W. Poling
• Ch. 3. Engineering Challenges and Solutions / George W. Poling
• Ch. 4. The History of the Morphological Change on the Seafloor of Rupert and Holberg Inlets / James W. Murray and Clem A. Pelletier
• Ch. 5. Geochemistry: Chemical Stabilities of Tailings Sediment / George W. Poling
• Ch. 6. Changes in Physical and Chemical Properties of Rupert Inlet Waters / Timothy R. Parsons
• Ch. 7. Changes in the Biological Properties of the Pelagic Environment of Rupert Inlet Waters During 22 Years of Mine Operations / Timothy R. Parsons.