The Tool Desk
Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →There is no universally safest way to store mine tailings. A mine should compare conventional impoundments, filtered dry stacks, thickened or paste systems, in-pit or underground disposal, and co-disposal against the same site-specific criteria: tailings behavior, geology, seismicity, climate, water balance, construction stages, consequence classification, community exposure, emergency response, closure performance and lifecycle cost. The Global Industry Standard on Tailings Management (GISTM) requires this alternatives analysis and requires designs to be updated when monitoring data or material conditions change.
What tailings storage is designed to control
Tailings are the finely ground mineral-processing residues left after valuable minerals are recovered. They commonly contain water, process chemicals and particles that can remain mobile for long periods. A storage facility must keep the solids stable, control seepage and free water, withstand floods and earthquakes appropriate to its setting, and remain manageable through construction, operation, closure and post-closure.
As an Amazon Associate I earn from qualifying purchases.
In a conventional facility, an embankment retains deposited tailings and process water. In other systems, water is removed before placement, tailings are deposited at higher density, or material is placed in a mined void or underground opening. Each approach changes the hazards rather than eliminating them. A dry stack may reduce stored free water but introduce demanding filtration, drainage, dust, erosion and weather-resilience requirements. An in-pit option may reduce surface exposure but create difficult groundwater, geochemical and long-term stability questions.
The GISTM expresses the overarching objective as “zero harm to people and the environment with zero tolerance for human fatality.” That objective makes the choice of technology only the first decision; governance, construction quality, water management and emergency readiness determine whether the design performs safely.
#1 Best Overall
- Valued Carpenter Pencil Set: You will get 2 pcs solid carpenter pencils with 26 piece 2.8 mm refills, 1 replaceable sharpener, 1 plastic storage box.The complete carpenter pencils combination allows you to finish your work faster and more easily
- Deep Hole Marker Pencil: The deep-hole construction pencils adopts 45mm elongated tip design, which is more convenient to mark in the small hole or in other tight areas that other carpenter markers cannot reach
- Carpenter Pencils with Sharpener: The sharpener is screwed into the top of the work pencil, which won't get lost either. Built-in pencil sharpener that keep the lead with pointed and smooth to Improves line of sight in fine work
- Stronger Solid Lead: This work pencil is matched with a 2.8 mm thick lead , which is much thicker and stronger during the drawing process of construction work, it will not break or damage easily
- Marks on Various Surfaces: 3 colors solid construction pencil can marks on various surfaces,such as metal, plastic, wood, paper etc. Ideals for woodworkers, contractors, craftsmen, builders, merchants and masons
Principal tailings-storage options
Conventional water-retaining impoundment
Tailings are deposited behind an engineered embankment, with a pond or other free-water zone managed inside the facility. Design reviews must examine embankment and foundation stability, seepage, pond location, freeboard, flood routing, staged raises, liquefaction, static instability and credible breach paths. The upstream and downstream consequences of a release are part of the design basis, not an afterthought.
Conventional impoundments can be appropriate where the geology, climate, water balance, construction capability and operating controls are favorable. Their risk depends on the actual facility and its management; the available standards do not provide a universal failure rate or rank every impoundment against every alternative.
Filtered or “dry-stack” tailings
Filtration removes more water before placement, reducing the free-water inventory and potentially changing embankment loading and release pathways. The resulting stack still needs geotechnical design for its foundation, drainage, slope geometry, traffic and placement sequence. Operators must control dust, wind and rainfall erosion, protect filters and drains, recover process water, and demonstrate that the stack remains workable during wet, cold or otherwise adverse conditions.
Dry stacking is therefore not automatically safe or feasible. Filter performance, energy demand, filter-cloth availability, pumping and conveying arrangements, rainfall intensity, freeze-thaw conditions and closure cover performance can all control whether the option works at a particular mine.
Thickened and paste tailings
Thickening or paste technology increases solids concentration and uses rheology control to reduce free water and support higher-density deposition. The design must show that the material can be pumped, discharged uniformly and drained without creating saturated zones or unstable beaches. Important variables include mineralogy, particle-size distribution, chemistry, climate, beach slope, deposition pattern, energy use and water-recovery targets.
Rank #2
- Ergonomically Designed: Work in tight areas with a compact design that gets into tough spots
- Both tools are designed to fit into difficult to reach spaces
- Complete a wide range of applications with a high-performance motor that delivers up to 300 UWO, and an impact driver delivering up to 1,400 in-lbs of torque
- Both the DEWALT impact driver and drill driver feature integrated LED work lights with a convenient 20-second delay, ensuring enhanced visibility in dimly lit or challenging work areas
- One-Handed Loading - Keep one hand free with a 1/4 in. hex chuck that accepts 1 in. bit tips
In-pit, underground or combined disposal
Mined pits and underground workings can provide storage where their geology, hydrogeology, geochemistry, stability and permitting conditions are suitable. The assessment must consider interactions with groundwater, pit-wall movement, future mining, subsidence, contaminant migration and the ability to monitor or intervene after closure. Combining surface and underground placements can reduce one facility’s volume but creates interfaces that need their own design criteria.
Co-disposal and backfill
Co-disposal mixes tailings with waste rock, while backfill places tailings underground to support mined openings or replace some surface storage. These methods can reduce the volume of a surface impoundment, but handling, mixing quality, geochemical reactions, curing, access and production scheduling may constrain them. They are alternatives to evaluate, not generic substitutes for a properly designed facility.
How to compare technologies before selecting one
GISTM Principle 5 requires an alternatives analysis that considers tailings technologies and design choices in their technical, social, environmental and local-economic context. The analysis should be documented at concept, detailed-design, operating and closure stages, then revisited when performance data or material conditions change.
| Decision axis | Questions the study should answer |
|---|---|
| Free-water inventory | How much process water and stormwater can be present, where will it sit, and how quickly can it be removed or routed during an extreme event? |
| Embankment and foundation loading | What loads, pore pressures, drainage conditions and staged raises will the foundation and containment structures experience? |
| Static and seismic stability | Could the deposited material, foundation or embankment liquefy or deform under static loading, earthquake shaking or rapid drawdown? |
| Water recovery and energy | What pumping, thickening, filtration and reclaim-water systems are required, and can they operate reliably through outages and changing ore conditions? |
| Climate and flood resilience | Can the facility manage design storms, snowmelt, drought, extreme heat, freeze-thaw and projected climate changes over its life? |
| Footprint, dust and erosion | What land area is disturbed, and how will windblown dust, surface erosion and sediment transport be controlled? |
| Construction and operations | Can each construction stage be built to the design intent, inspected and maintained with available skills, equipment and materials? |
| Monitoring and response | Which instruments and inspections will detect changing conditions, and who has authority to act when a trigger is reached? |
| Closure and post-closure | Can the final landform, cover, drainage and water treatment remain stable with a defined owner and funding after mining ends? |
| Consequences and community exposure | Which people, infrastructure, ecosystems and cultural or economic resources lie downstream, and how would a credible release affect them? |
| Permitting and lifecycle cost | What approvals, social commitments, energy, maintenance, monitoring and closure liabilities apply over the full facility life? |
A multi-criteria decision record should show the assumptions, uncertainties, rejected options and reasons for the selected concept. A low water inventory does not compensate for an unbuildable filter plant; a small footprint does not offset an unmanageable closure liability.
How tailings-dam failures develop
Failure can involve the embankment, foundation, abutments, reservoir, pond, rim or appurtenant structures. Common initiating conditions include uncontrolled seepage and internal erosion, inadequate freeboard, overtopping, foundation weakness, static or seismic liquefaction, rapid drawdown, poor construction quality, blocked drains, unexpected tailings behavior and loss of operational control. A credible risk assessment traces how an initiating event could progress to breach, runout and downstream impact.
Rank #3
- 【Great Compatibility】This Katerk 1/4 inch hex shank bit holder is specifically designed for 1/4 inch hex shank drill bits. It's compatible with most 1/4 fast hex handles, hex sockets, various electric screwdrivers, and handheld screwdrivers. The bit holder makes it a valuable addition for any handyman.
- 【Secure and Safe】Built with a secure backup nut design, each drill bit holder securely locks onto your bits, ensuring they stay firmly in place. Additionally, our bit holder incorporates a high-quality steel ball rolling design that holds up to several kilograms of weight, ensuring your various drill bits don't fall off.
- 【Easy One-Handed Operation】The bit holder for impact driver allows you to change bits single-handedly, simplifying your workflow. Its multi-color design further allows for quick identification of the drill bit you need.
- 【Compact and Convenient】Thanks to its compact size, this 1/4 inch bit holder is easy to carry around. The bit holder allows for easy attachment to various tools, making this a convenient addition to your construction accessories. The Katerk bit holder is cast from high-quality alloy material, promising a long product lifespan. Despite its rugged strength, the bit holder remains lightweight, making it portable.
- 【Cool Christmas Gift For Men Stocking Stuffers】 This screwdriver bit holder, driver bit holder, impact bit holder, can be given as a gift to your loved one, especially for anyone involved in construction or electrical work. It's a must-have for stocking stuffers for men and women, tools gifts for dad, tech gadgets for men, gifts for dad, gifts for him, gifts for husband, gifts for boyfriend, cool gadgets for men, and cool gifts for dad.
Tailings properties can change as ore sources, grinding conditions, water chemistry or deposition methods change. Beach slopes, density, saturation and pore pressures observed during operation may differ from the original model. Designs and operating rules therefore need a feedback loop from field data to engineering decisions.
Do these 3 things before closing this tab:
1Clear out junk files and repair common Windows errors2Scan for outdated or missing drivers - takes under a minute3Repair Windows errors before they cause bigger problemsEight controls that reduce failure risk
1. Build an integrated knowledge base
Compile geology, geotechnical conditions, hydrology, hydrogeology, tailings testing, climate data, upstream and downstream basins, mine plans and operating constraints. Characterize variability, not only average values. Update the knowledge base when new drilling, laboratory results, monitoring trends or climate information changes the design assumptions.
2. Use risk-based design
Identify failure modes for the entire facility and its appurtenances, estimate likelihood and consequences, and select controls that address the highest risks. Include temporary and interim configurations, not only the final embankment. Design criteria should be traceable to the consequence classification and credible hazards at the site.
3. Control water with a live water balance
Maintain a water-balance model that accounts for process inflows, rainfall, evaporation, seepage, reclaim, treatment capacity, snowmelt and operating outages. The water-management plan should prevent unintentional releases by controlling pond location, drainage, seepage collection, spillways, diversions and freeboard. Review forecasts and measured levels frequently enough to act before storage margins are lost.
4. Design and verify every construction stage
Cover start-up, partial raises, interim storage, the final raise and closure. Survey as-built geometry, verify materials and compaction, inspect drains and filters, and document deviations. If construction differs from the design intent, stop and resolve the change through the accountable engineer rather than allowing an informal field modification to become permanent.
Rank #4
- Long Nib and Deep Hole Marker: Our mechanical carpenter pencil with 45mm nib is designed for easy marking of deep holes or narrow areas. These construction pencils are the great choice for woodworking tools, construction tools, carpenter tools, contractor tools, wood carpentry tools and architect tools
- Extra Refills in 2 Colors for Versatile Marking: The construction mechanical pencil comes with 12 extra 2.8mm refills, including 6 red and 6 black refills. The black refill is suitable for light surfaces, while the red wax is perfect for dark surfaces. Our carpenter mechanical pencil makes sure that you'll have an ample supply for extended use
- Built-in Sharpener: Our construction pencil comes with a built-in sharpener to ensure the mechanical pencil tip is always sharp and ready for use. Never buy an extra pencil sharpener again. A great tool for any woodworker pencil, contractor pencils. The refill can easily be extended or retracted with a simple click of the pencils mechanical, allowing you to work more efficiently and accurately
- Portable Clip Design: Our deep hole construction pencil features a portable clip design, easy to carry and attach to your pocket or tool box, so that you can keep the carpenter pencils mechanical close at hand, making it a convenient tool to have on the go. Great gifts choice for carpenters
- Stronger Pencil Lead: The black refills are made of lead, sturdy and smooth. The red refills are made of wax, clear and light. These marking pencils are much thicker and stronger than normal pencils during the marking process of construction work, suitable for various surfaces, such as glasses, metal, boards, floors, walls, furniture, etc. The written marks can be easily wiped with a wet paper towel when needed
5. Connect monitoring to decisions
Use instrumentation and inspections suited to the identified failure modes: for example, piezometers for pore pressure, survey points or radar for movement, seepage measurements, water-level gauges and deformation observations. Define trigger levels, response times, responsibilities and escalation in a trigger-action response plan. Data review must lead to an action, not merely a dashboard update.
6. Make independent review and accountability explicit
Name the accountable operator, the engineer responsible for design and the independent technical reviewer. Independent review should test assumptions, construction records, surveillance data, risk controls and proposed changes. Management must give these roles authority, resources and direct access to decision-makers.
7. Prepare for emergencies and recovery
Develop inundation maps and emergency action plans for credible release scenarios. Establish warning methods, communication protocols, evacuation routes, drills, coordination with authorities and arrangements for protecting responders. Plans should address night-time events, loss of power or communications, blocked roads, vulnerable populations and the transition from immediate life safety to environmental and community recovery.
8. Plan closure from the beginning
Demonstrate that the final landform, cover, drainage and water-quality controls are feasible before construction begins. Implement progressive reclamation where practical, define measurable closure-success criteria and retain post-closure governance, inspection, monitoring and funding. The February 2025 ICMM good-practice guide emphasizes these lifecycle responsibilities.
Recommended Free Tools
Operating controls that deserve special attention
Pond position and freeboard
Keep the pond in the location assumed by the design and maintain the required freeboard for the current stage and forecast conditions. Unplanned pond migration toward an embankment can increase pore pressures and reduce the margin against instability. Operators need documented rules for reclaim, pumping, storm preparation and recovering from equipment outages.
Best Value
- Milwaukee Ink all Fine Point Marker, Black, 4 Per Pack
- 4 per pack Features Clog Resistant Marker Tip Writes through Dusty, Wet and Oily Surfaces Durable Marker Tip for Writing on Concrete, OSB and Rough Surfaces
- Clog resistant tip writes on dusty, wet and oily surfaces and is optimized for rough surfaces such as OSB, cinderblock and concrete
- Hard hat clip- attaches for easy access
- Quick dry time with reduced smearing and marking
Deposition and beach management
Deposition plans should produce the density, beach geometry and drainage assumed in the stability model. Track discharge points, beach slopes, water levels, pond movement and areas that remain saturated. Changes in ore blend or rheology may require revised deposition rates, spigot layouts or laboratory testing.
Seepage and drainage
Inspect drains, toe areas, seepage collection systems and downstream water-quality monitoring points. A change in flow, clarity, chemistry or pressure can indicate clogging, internal erosion or a developing preferential pathway. Treat unexplained trends as engineering issues requiring investigation, not as routine maintenance.
Governance under the Global Industry Standard
GISTM was issued in 2020 by the United Nations Environment Programme, the International Council on Mining and Metals and the Principles for Responsible Investment. It contains 15 principles and 77 auditable requirements covering affected communities, integrated knowledge, design, construction, operation, emergency response, closure, disclosure and accountability.
Quick wins for a faster PC:
Clear out junk files and repair common Windows errorsFree Scan →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Repair Windows errors before they cause bigger problemsFix Now →The standard is deliberately context-specific. It does not declare one technology safest; it requires operators to investigate alternatives and manage the selected facility through its full lifecycle. ICMM’s 2021 conformance protocols map the 77 requirements to 219 criteria, giving operators and reviewers a structured way to test evidence.
ICMM launch materials described 27 mining and metals companies and more than 35 regional and commodities associations, representing about one-third of the global industry through ICMM members. ICMM members committed to conformance by August 2023 for extreme- and very-high-consequence facilities and by August 2025 for other facilities. Those dates are member commitments, not a blanket statutory deadline for every mine worldwide.
The standard’s emphasis on transparency reflects lessons from the 25 January 2019 collapse at Vale’s Córrego de Feijão mine in Brumadinho, Brazil, which prompted the Global Tailings Review. UNEP Director Ligia Noronha summarized the principle plainly: “The approach to mine tailings facilities must place safety first by making environmental and human safety a priority in management actions and on-the-ground operations.”
Quick Recap
A practical decision workflow for a new or changing facility
- Define the inventory and setting. Confirm tailings characteristics, production schedule, water sources, climate, geology, seismicity and downstream receptors.
- Screen all plausible technologies. Include conventional, filtered, thickened or paste, in-pit or underground, and co-disposal or backfill where technically credible.
- Model the lifecycle. Evaluate construction stages, operations, closure and post-closure, including credible failure modes and consequence classification.
- Test uncertainty. Run sensitivity cases for tailings strength, saturation, storm events, earthquakes, water-reclaim outages, climate changes and production variability.
- Select controls with owners. Assign design, operating, monitoring, emergency and closure controls to named accountable roles.
- Record the decision. Preserve assumptions, rejected alternatives, review comments and approval authority so later changes can be assessed against the original basis.
- Reassess when conditions change. Update the design when monitoring, material behavior, mine plans, climate information or community conditions invalidate an assumption.
Questions engineers and communities should ask
- Where is the free water today, and where could it move during a storm or outage?
- What are the credible static, seismic, seepage and overtopping failure modes?
- Which construction stage has the smallest margin, and how is it monitored?
- What trigger requires reducing deposition, lowering the pond, evacuating people or stopping work?
- Who can make that decision at night or when normal communications fail?
- What evidence shows that the selected closure landform and drainage system will remain effective?
- How are affected communities involved in risk communication, emergency planning and disclosure?
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
