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By Miguel A Heredia

During the thirty three week of the year (August 12th to August 18th, 2019), at least 23 press releases were announced by companies working in Mexico, with six announcing financial rounds, five communicating production results, four reporting on resources and development of their projects, three disclosing deals and corporate issues, three informing on exploration results, and two commenting on Mexican issues.   ON MEXICO ISSUES, Mexican president, Andres Manuel Lopez Obrador, declared that current mining concessions won´t be cancelled but no new ones are going to be issued. Fresnillo plc led the 2018 Pb production in Mexico.  ON EXPLORATION, In Chihuahua, Kootenay released exploration drilling results from its Columba project. In Durango, Gainey advanced the drilling program at its Las Margaritas project. In Zacatecas, Galore provided an update of the drilling program performed at its Dos Santos project in Zacatecas. ON MINING, Americas Silver, Aura Minerals, Impact, Odyssey, and Sierra Metals reported production and financial results from their Mexican mining operations for the period Q2, 2019. ON FINANCING, Defiance, Galore, Impact, Kootenay, SilverCrest, Southern Silver, and Valterra announced financial rounds. ON RESOURCES AND DEVELOPMENT, Endeavour reported positive drilling and underground channel sampling results from its Parral project in Chihuahua. Minera Alamos announced commencement of phase 2 drilling at its Santana Au project in Sonora. Premier Gold provided an update of its ongoing drilling program at its Mercedes mine in Sonora. Mag Silver provided an update of mine development at its Juanicipio project in Zacatecas. ON DEALS AND CORPORATE ISSUES, Santacruz and its 50% owned subsidiary company Carrizal Mining entered into an agreement to extend the expiry date of the current Zimapan mine lease agreement located in Hidalgo state. Telson curtailed mining operations at its Campo Morado mine in Guerrero and plans to focus on construction of mine at its Tahuehueto Au project in Durango.  Discovery Metals granted stock options to certain officers, directors, employees, and consultants (Puerto Rico project, Coahuila).


  • Mexican president, Andres Manuel Lopez Obrador, declared that current mining concessions won´t be cancelled but no new ones are going to be issued. He said that concessions have not being held for production purposes but rather for financial speculation. He also asked mining companies to take care of the environment and pay salaries to the miners as in USA and Canada. Mining companies remain to be seen if his vow will translate into action since, until now, there is not a detailed legal and regulatory framework.
  • Fresnillo plc., led the 2018 Pb production in Mexico. Five companies produced approximately 73% of the 538.3M Lb Pb produced in 2018, with Fresnillo producing 22.1%, followed closely by Newmont-Goldcorp with 22%.


  • Kootenay Silver Inc., announced drill results of the six first holes drilled at its Columba Silver project in Chihuahua. Results have confirmed shallow-high grade Ag mineralization associated to quartz-calcite veins, breccias, and stockworks in five of the six holes. Widths range from 4.8m to 16.5m on the F Vein, and from 1.17 to 1.5m on unknown hanging wall veins in two of the holes. Significant intersections were encountered in hole CDH-19-01 with 93 g/t Ag over 16.5m, including 141 g/t Ag over 9.42m, and including 390 g/t Ag over 1m; hole CDH-19-02 with 104 g/t Ag over 14m and 213 g/t Ag and 0.31 g/t Au over 3.73m, including 328 g/t Ag over 1m, and 332 g/t Ag and 0.55 g/t Au over 0.70m; hole CDH-19-05 with 230 g/t Ag over 4.83m, including 518 g/t Ag over 2m, and including 775 g/t Ag over 1.15m; and hole CDH-19-06 with 133 g/t Ag over 10.45m before entering into a mine stope over 3m wide, including 287 g/t Ag over 1.45m. the hole CDH-19-06 also hit two hanging wall veins with 235 g/t Ag over 1.5m wide, and 267 g/t Ag over 0.87m wide. “Drilling thus far has tested approximately 450 meters of strike in broad spaced fences of holes from depths as shallow as 20 meters to as deep as 150 meters with 5 of 6 holes intercepting the F vein”. 
  • Gainey Capital Corp., reported that is doing the last activities to prepare the infrastructure required to commence the drilling program at its Las Margaritas project in Durango. The focus now is on repair and constructs 39km of road to facilitate access to and between drill sites. The company will provide further updates as the drilling commences.
  • Galore Resources Inc., announced that it has completed four core holes for a total of 1,324m at El Alamo target within its Dos Santos project in Zacatecas. These four holes are part of a 2,500 drilling program. Samples from holes EA-001 and EA-002 were submitted to the lab and results are expected soon. Hole EA-003 was abandoned prior to reaching the target depth due to mechanical issues. “Drill holes have intersected more extensive zones of pyrite mineralization than anticipated, both fresh and oxidized. Pyrite and strongly oxidized zones, normally within brecciated limestone, are of particular interest based on previous sampling of the surface outcrops that were found to contain weakly anomalous gold values to high-grade gold values (high of 20g/t Au) from previous trench sampling”.


  • Americas Silver Corporation, reported revenue of $15M and net loss of $8M for the period Q2, 2019. Guidance for 2019 remains unchanged at 1.6-2.0M Oz Ag and 6.6-7.0M Oz AgEq at cash cost of $4.0 to $6.0 per Oz Ag and AISC of $10.0-12.0 per Oz Ag produced. The Company had a cash balance of $6.3M as at June 30, 2019.
  • Aura Minerals Inc., announced revenue of USD $50,374,000 for the period Q2, 2019, from which USD $16,828,000 correspond to Cu revenue from its Aranzazu mine in Zacatecas. Total cost of production at Aranzazu was USD $12,915,000, depletion and amortization of USD $1,618,000, gross margin of USD $2,295,000. The company had other expenses for the amount of USD $1,872,000, for a resulting income before taxes of USD $423K.
  • Impact Silver Corp., presented Q2, 2019 production and financial results from its Zacualpan mining district in Mexico State. Impact milled 33,616 tonnes of 160 g/t Ag to produce 145.6K Oz Ag. The company reported revenues of $2.8M.
  • Odyssey Marine Exploration, announced financial results for Q2, 2019. Odyssey reported a net loss of $2.8M and total revenue of $0.8M (Bay of Ulloa phosphate project, Baja California Sur).
  • Sierra Metals Inc., reported Q2, 2019 consolidated production and financial results from their Mexican and Peru operations. The company produced 9.7M Lb Cu, 0.8M Oz Ag, 16.6M Lb Zn, 8.1m Lb Pb, and 2,540 Oz Au. Cash cost per Lb CuEq payable Lb was USD $1.51 and an AISC of USD $2.55, while at its Cusi mine, the cash cost per Oz AgEq produced was USD $16.49 and an AISC of USD $25.67. Sierra Metals announced an adjusted EBIDTA of USD $126M, and an operating cash flow of USD $12.8M.


  •  Defiance Silver Corp., closed a non-brokered private placement in the amount of $3,323,106. Gross proceeds will be used to continue an aggressive exploration program at its San Acacio Silver project in Zacatecas. It exploration program will be focused on drilling the new Ag shoots along the Veta Grande vein, the recently defined Ag-Cu geophysical anomaly, and further resource expansion.
  • Galore Resources Inc., announced that is continuing its effort to implement a non-brokered private placement to raise up to USD $1.5M. Net proceeds of the non-brokered private placement will be used for continued drilling of the El Alamo claim, drilling at the Los Gemelos claim (Dos Santos project in Zacatecas) and for general working capital.
  • Impact Silver Corp., completed its second series of the third and final tranche of a non-brokered private placement for gross proceeds of $554.2K. Net proceeds will be used for greenfield exploration on its large ground package in Zacualpan Silver mining district, Mexico State, and projects such as San Ramon Deep extension, Manto America, and Santa Teresa.
  • Kootenay Silver Inc., announced a non-brokered private placement for gross proceeds of $5M. Net proceeds of the private placement will be used to advance exploration of the Columba Ag project in Chihuahua, potentially adding a further drill rig to expedite the current drill program, and to fund further work at Copalito, Sinaloa, La Cigarra, Chihuahua, and other projects as well as for general working capital purposes.
  • SilverCrest Metals Inc., completed its prospectus offering for gross proceeds of $25.3M. The company also announced that SSR Mining Inc., purchase SilverCrest stock in a separate non-brokered private placement for gross proceeds of CAD $4.6M. The company plans to use the net proceeds to continue exploration and advancement of its Las Chispas project in Sonora to feasibility level, and for working capital purposes.
  • Southern Silver Exploration Corp., closed the first tranche of a non-brokered private placement for gross proceeds of $3.1M. At final closing, due to increased interest in the offering, the company plans to close on an oversubscribed amount to a maximum of 22.5M units for gross proceeds of $4.5M. Net proceeds will be used to continue the 2019-20 exploration programs on its Cerro Las Minitas project in Durango.
  • Valterra Resource Corporation, extended 30 days the closing of its equity financing. The offering is for $375K with an over-allotment option to increase it by up to 10%. Net proceeds from the private placement may be used in part to fund costs associated with initial exploration programs for the Los Reyes Au-Cu project in Chihuahua.


  •  Endeavour Silver Corp., reported positive exploration drilling results from its Parral project in Chihuahua. The company completed 15 surface and underground drill holes totaling 3,160m, and 462 underground channel samples in 3 blocks in the Sierra Plata mine on the Veta Colorada vein system. Significant drill intersections are in hole VCS-02 with 346 g/t Ag over 9.6m true width (TW), including 784 g/t Ag over 0.50m TW in the hanging wall of Veta Colorada, and 283 g/t Ag over 5m TW, including 975 g/t Ag over 0.5m TW in Veta Colorada; hole VCU-03 with 326 g/t Ag over 8.2m TW, including 727 g/t Ag over 0.3m TW in Veta Colorada; hole VCU-04 with 253 g/t Ag over 7.7m TW, including 1,200 g/t Ag over 0.4m TW; and hole VCU-05 with 332 g/t Ag over 13.1m TW, including 3,770 g/t Ag over 0.2m TW. Channel sampling highlights include 2 samples exceeding 1,000 g/t Ag such as 1,705 g/t Ag over 0.55m TW, and 1,480 g/t Ag over 0.95m TW. The rest of the sampling results vary between 509 and 911 g/t Ag in widths ranging from 0.3 and 1.50m. The full width of the vein is not exposed so the sampling is partially indicative of the Ag mineralization.
  • Minera Alamos Inc., announced the commencement of phase 2 drilling at its Santana Au project in Sonora. The goal is to expand resources at the main Nicho deposit as well as follow-up drilling on several new discoveries made during Phase 1 work in late 2018.
  • Premier Gold Mines Limited., provided and update of its ongoing drilling program at its Mercedes mine in Sonora. The company has confirmed two high-grade zones: the Lupita extension, and the newly discovered San Martin target area. Significant drill interceptions were encountered in hole L19-422D at the San Martin area with 14.02 g/t Au and 136 g/t Ag over 2.9m; hole L19-414D at the Lupita area with 8.41 g/t Au and 68 g/t Ag over 3.9m, including 16.2 g/t Au and 92 g/t Ag over 1.4m; hole L19-414D with 4.57 g/t Au and 27 g/t Ag over 4.5m; and hole UG-RDO19-40 at Rey de Oro area with 18.15 g/t Au and 27 g/t Ag over 2.3m.
  • Mag Silver Corp., and its JV partner Fresnillo plc, provided and update of mine development at its Juanicipio project in Zacatecas. The company reported that underground development continues and is now approaching 22km to date, “with the current emphasis on: developing the three internal spiral footwall ramps at depth along the full strike length of the Valdecañas Vein system; constructing the underground crushing chamber; advancing the conveyor ramp from both ends to and from the planned mill site (with the box cut for the underground conveyor exit portal now complete); integrating additional ventilation and other associated underground infrastructure, and starting of the internal shaft sinking (head chamber for the shaft has been excavated and winding equipment ordered)”. Progress at Juanicipio has been rapid with multiple engineering milestones delivered, and construction on track for H2, 2020 commissioning target according to the operator Fresnillo. The mill-site preparation is underway and the construction of surface infrastructure facilities continues.


  •  Santacruz Silver Mining Ltd., and its 50% subsidiary company Carrizal Mining S.A. de C.V., entered into an agreement with Minera Cedros S.A. de C.V., (a wholly-own subsidiary of Grupo Peñoles, S.A.B. de C.V.), to extend the expiry date of the Zimapan mine lease agreement, located in Hidalgo state. “Carrizal must make monthly payments to Minera Cedros based on 4% NSR from the concentrates produced by the Zimapan mine for each respective month, subject to the minimum payment each month being USD $45K and the maximum payment being USD $60K”.
  • Telson Mining Corporation, curtailed indefinitely mining operations at its Campo Morado mine in Guerrero and placed the mine into care and maintenance. The decision was taken since the company is concerned about certain activities in the vicinity of Campo Morado that put at risk the health and welfare of its workforce. The company plans to focus on construction of mine at its Tahuehueto Au project in Durango.
  • Discovery Metals Corp., granted stock options to certain officers, directors, employees, and consultants (Puerto Rico project, Coahuila).


Content like what you have just read can be seen at and at LinkedIn’s Mexico Mineral Exploration Group.

On the picture above, a diatreme breccia in a prospect in Durango, Mexico.  Photo by Miguel A Heredia.

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LTE versus Wi-Fi in underground mining Mining practices are demanding for more efficient ways of operation. This has resulted in mines adopting many different technologies to assist them in driving down costs and increasing profits. These applications enable mining companies to measure, collect and report on many different areas within the production environment. One common requirement that all these applications have is a network to carry data from one end to another. The type of connectivity medium is usually dictated by a few factors, some of these include; - Data size - Data transmitting intervals - Distance - Availability to electricity - Data protocol type (Wi-Fi, Ethernet) - Environment (Surface, underground) With the constant developments in technology, and more specifically mining systems becoming more open standards-based, promotes commercial network technology to be introduced into these demanding environments. One of those being LTE (Long Term Evolution) technology. If we use a smart device in our personal capacity, we are already quite familiar with how this works - mobile wireless, high-speed data connection. So how would this work in an underground mining environment? Well, the answer is not simple, and that's exactly what we want to test

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The Trial Site

The mine is one of the biggest gold producers in the world and has a large operation consisting of open-cast (surface) and underground mining methods. The mine has rolled out Wi-Fi access points in a section of the mine but wants to investigate the feasibility of underground LTE. The need for an underground network is for a fleet management system to all production equipment (loaders, haul trucks, drills). The outcome of the test will need to provide the capacity and coverage the network will be able to provide. The Testing Partner - Scan RF Projects Scan RF Projects have designed and implemented purpose-built networks. These include networks in Open-pit, underground hard rock and intrinsically safe underground environments to some of the biggest global mining companies. Overview of trial The LTE trial will consist of fixed hardware in the form of a base station that will be installed at a pre-defined area in the mine. A mobile unit will be installed on a vehicle and the coverage together with throughput will be measured with specific software, as the vehicle moves through the sections. Keep following the weekly series of posts to follow progress.

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LTE vs Wi-Fi Test. With existing technologies such as Wi-Fi and Fibre, connectivity is already available in underground environments. Most mining operations split production and IT networks, and therefore having multiple network infrastructure required for disparate systems. The potential introduction of LTE could enable one standard network typology for a multitude of applications such as: 1. Mining Operations - Fleet Management - Remote operation of machinery - Maintenance: Equipment health, Tyre and Fuel monitoring - Autonomous vehicles - Safety: Drowsiness, anti-collision, access control - Geotechnical, geology, SCADA 2. Environment - Weather stations - Seismic radars - Dust Emission 3. Process Control - Leach Pad control: Flow, pressure, oxygen - Leaking alerts 4. Hydrogeology - Water resource management (production, levels, pressure, flow, consumption) - Waterwell operation - Dewatering 5. IT - Connectivity to remote locations. - Wireless corporate network - Industrial Internet of Things 6. Security - Access Control - CCTV The purpose of the LTE underground trial is to determine whether it is a feasible stand-alone option or if a combination of wireless technologies is required to address the ever-growing demand for connectivity.

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Wi-Fi versus LTE in underground ming

We are running a test in the DRC to compare Wi-Fi and LTE effectivenes in underground mining. Or team has just arrived in the DRC. What we want to look at is what the best solution would bei ie Wi-Fi; LTE or a hybrid and to compare the results. We have done a few videos in preparation for this test which I will post here. Please let me know if there are any specific questions you want to be answered.

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50 year Aggregate Demand vs Permitted Supply

DID YOU KNOW?- According to the California Department of Conservation, California lacks sufficient permitted aggregate mines to meet future needs. Many areas have less that half the permitted reserves needed to meet projected demand for the next 50 years.  3414425949?profile=RESIZE_710xIn the image above we highlighted the San Bernardino Region. Currently, there are approximately 156 million tons of permitted aggregate reserves yet over the next 50 years this region will demand 938 million tons.  

Another area of concern is Stanislaus County. This county currently has 39 million tons of permitted aggregate reserves yet over the next 50 years this county will demand 160 million tons.


Take a look at the interactive CALCIMA map by clicking on the link here----> 

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Local miners

We source for an international person or buyer, whom will help sell or buy the Gold we currently have in stock. I represent very Local Miners who we have organized into a cooperative society. They amount to more than 3600 in membership from 16 Different villages in the region. Every member is continuously mining and at the end of each day, every one contributes his finds. From one person is 2 Gram, from another 5 gram and yet another can come up with nothing or half a gram. This is how we arrive at the end quantity that we offer for sale

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+50 Mill ROI in 12 months. Mine Production.

Hi All,

I have my CEO coming to Australia in late October and then to India to present on a numbe of topics in and around the following areas.

• Production OEE, Theory of Constraints and Asset Utilization.
• Asset Performance
• Predictive Maintenance
• Defect Elimination
• Equipment Downtime
• Asset Health, Reliability and Availability
• Metallurgical Accounting

I have a case study which is attached and outlines a +50 Million dollar ROI within the first 12 months using the Optimum System, if you are interested to know more or would like to be appart of a presentation in Perth Australia late October 2019 or you are a company in India or New Zealand or PNG and would like to know more please make contact with me.


It seems the case study will not attach, please PM me if you are interested to know more.


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This post is directed at mining professionals working with stope design and/or mine planning in underground mines. Underneath you find a short description of the research project and the survey related to it. The project description can also be found on the Survey-site itself. So in case the text underneath seems to detailed, you can already find the link to the survey here:
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You send me many letters asking me to write my business plan. It is right that you are interested in my opinion. I worked in different universities of the world. I communicate a lot online with different people.

I can share my independent opinion about mining in the world. Everywhere is the same. They promise to do this work and go to the laboratory to do experiments. Next on luck. It turns out or not. 

There is no laboratory in the world has enough equipment and specialists to create new generation technologies. Problems are growing. Traditional types of ores are running out but for new ores there is no technology.

I did a little calculation. How much money is needed to create a modest modern ore benefication laboratory.
1. Buildings and facilities – 20 million dollars
2. Equipment and apparatus – 15 million dollars
3. Monthly expenses are more than 15-20 million dollars per month.

At full load, this laboratory and design organization can perform work for a maximum of 2-3 million dollars per month. This whole company of specialists from around the world will be able to perform work only in a close-knit team: because each of them knows only his own problem and does not control the whole situation in the complex.

This means that every month you lose 18-12 million dollars per month (216-144 million dollars a year). You also spent another 35 million on equipment and building. Also You have to spend several million on staff training.

Let’s say that you went the traditional way. You invested hundreds of billions of dollars (for 50-100 years). You have trained hundreds of new specialists, opened new research institutes and laboratories, and issued hundreds of scientific grants. And so, 50-100 years passed, but a miracle did not happen. If you have not yet done this, then stop, and do nothing.

Universities understand that they have no such opportunities, but they really want the money. They create a fairy tale for investors on paper. Next to the sign that this is a student’s educational laboratory of ore beneficiation, new ones will appear: Innovation Center, Technology Center, Technology Certification Center, Certification Center of raw materials (ore, waste), Center for complex processing of raw materials, Laboratory for waste processing and so on.

If earlier it was a backward laboratory with old non-working equipment measuring 100 square meters, now, according to documents, this is a certified scientific center measuring 200-600 square meters and with the latest stunning equipment worth millions dollars.

They enter into their documents famous people who do not even know it. I learned many times that someone enrolled me in my project or scientific school without my consent and permission.

They draw up the necessary documents and begin to search for the simpleton. However, they have no idea what they will do.

I know many such examples. If a researcher can just “eat money” for years without getting the expected final result, then he will do so (Murphy’s Law). The increase in funding for research will only exacerbate this situation.

I suggest that you bypass the path of traditional development.

I considered the costs and did not create a laboratory. I created “PETROVSKY´S MATRIX”.
For many years I have been working on creating a “Mineral Benefication Information System”. I create it with my own money and am the only copyright holder.

This system you need. I don’t need it.

I can create 5 competing technologies for any ore without any information system. It is very difficult and only I can do it. In fact, “Mineral Benefication Information System” will be my only competitor.

You need my “Mineral Benefication Information System” and “Petrovsky’s Matrix”.

No need to teach anyone. For this, you will need centuries of hard work and the abandonment of all your stereotypes, theories and delusions. I think that for you it is almost impossible in the near future.

You need just to create a my smart system and let it work.

You do not need hundreds of specialists in the field of mining, but only a few people to interact with the expert system”Mineral Benefication Information System”. An independent expert system will describe the real situation (only if it is correctly taught) and will give you the accurate way of solving the problem.

Therefore, if we are talking about relatively small investments (about USD 10-20 millions), then I can recommend you to invest in me, this is the most reliable investment.
So, my business plan is an investment in me and under my name. Then we decide what is best for you, we can determine in detail the larger investments (under USD 1 billion and more).

You choose.

Sincerely, Ph.D. Natalia Petrovskaya


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Dear all

I am happy to be a new member here.

Even more, I would like to share with you the latest edition of the EFEE Newsletter. There's several good technical and scientific articles from the mining and explosives industry. The Newsletter is free to share to anyone who would be interested.

If you wish to have more information about the EFEE Newsletter or advertising opportunities or even the federation itself, you are very welcome to contact me.

Just click here: EFEE Newsletter

Next edition in May!



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The effect of lightning in the mining industry

Lightning has a huge effect in the mining industry. An example is the accident in Porgera gold mine in New Guinea in 2006, in which a lightning strike implied electricity shortages for more than three months, implying daily losses of 700.000$.

Read more about the effect of lightning in the mining industry and how to pervent potential accidents:

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European Space Agency Funding Mining Services

Hi everyone, 

I wanted to share an opportunity with the European Space Agency:  

The European Space Agency is providing funding for the development of mining services that use satellite data e.g. satellite imagery to monitor mining sites, GPS to help machine guidance 

Hope it looks interesting.  

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OHS. Dust safety.

Dear Mining Industry Professionals,

I am working in Occupational Health and Safety field, specifically in mining and quarrying.

I'm happy to share the news about occupational dust-related diseases like silicosis, "black lung" etc. along with regulations and recommendations to protect workers from dust exposure.


Here is the first article about respirable crystalline silica regulations update.

OSHA developed the guidance to employers and employees regarding final rule regulating occupational exposure to respirable crystalline silica in general industry. 81 Fed. Reg. 16286. "OSHA noted that the use of clothes-cleaning booths would be permitted because although such booths use compressed air to clean clothes, the dust is “blown out of the employee’s breathing zone and is captured by a filter.” 81 Fed. Reg. at 16797."

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St. Barbara's Day - 4th of December

St Barbara’s Day – 4th of December

A special day to pause and to appreciate the people dedicated to the mining industry, and celebrate the rich endowment of mineral wealth that underpins much of our global economy and provides hope for the future. It is a time for fellowship and fraternity, and to remember those who have been lost in our industry throughout the past year.



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Mining, Reclamation, and Surety Bonds

Hi Everyone,


Thank you so much for adding me into this amazing and fascinating world.  I am very new to mining, strip mining, blasting, reclamation, etc.  My interest level comes from the level of surety bonds.  I am not sure this is even allowed here on this site but I wanted to let people know that when bonds are required for your work I have markets that are willing to entertain the requests.  I have helped many people place these types of bonds.


Please feel free to email me at should you want to discuss a certain situation, risk, or bond.  I may be able to help.  Thanks again!

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