Hydrogeology Articles

  • What is an Aquifer?

    Aquifers are natural formations that store groundwater, but these vital structures are threatened The word “aquifer” means “water bearer.” In the context of hydrogeology, it refers to a natural underground formation of permeable ...


    By Fluence Corporation

  • Airborne Geophysical Solutions for Geotechnical Challenges

    SUMMARY Assessing geological risk is a significant part of infrastructure planning and managing project cost overruns and delays are persistent challenges for engineers and project managers. Risks can be difficult to control given the high cost of detailed ground investigation programs using traditional approaches (i.e. geotechnical drillings). Airborne electromagnetic surveys ...


    By SkyTEM ApS

  • Hydrogeologic and Geochemistry Support for Open Pit and Underground Mining at Ernest Henry Mine - Case Study

    Project Description The Ernest Henry Mine is a large open pit copper mine with deeper mineralization that was targeted for underground mining. A Feasibility Study (FS) was conducted to evaluate the potential for mining of the underground component by sublevel‐caving methods. The FS required the consideration of groundwater, including an evaluation of the expected inflows to the ...


    By Itasca International, Inc

  • Laver Rock Mechanics Pre-Feasibility Study - Case Study

    Project Description Boliden is investigating the Laver low-grade copper deposit for potential future mining. The old Laver deposit was discovered in the 1930s, and was operated between 1938 and 1946. Mining was primarily conducted as small-scale underground mining, but a small open pit was also in operation at that time. The currently investigated deposit is of larger scale and with lower ...


    By Itasca International, Inc

  • Rock Mechanics Study for the Kevitsa Strategy Project - Case Study

    Project Description The Kevitsa open pit mine has been in operation since 2012 and was acquired by Boliden in 2016. A new strategic plan is currently being developed to investigate an increase in production. In conjunction with this, the geotechnical slope design parameters for the final pit depth, including a possibly deeper pit, need to be analyzed. OFFICE ...


    By Itasca International, Inc

  • Predictions of Groundwater Inflow to Sublevel Stope Mining - Case Study

    Project Description This project involved simulating the proposed open pits and underground mining of the Aurora Mine in Guyana, predicting potential inflow rates into the pits and underground workings, and providing pore‐pressure distributions to the geomechanical model. OFFICE U.S. Denver Itasca Denver, Inc. ...


    By Itasca International, Inc

  • The Economic Challenges of Dewatering at the Victor Diamond Mine in Northern Ontario, Canada

    Abstract: The challenges of mining economically have never been greater than under current global financial conditions. The costs and efficiency of dewatering are particularly important at De Beers Canada’s Victor diamond mine in northern Ontario where: the bottom of the water-bearing carbonate country rocks is near the bottom of the planned pit, limiting the ...


    By Itasca International, Inc

  • Numerical Evaluation of Effectiveness of Drainwells in Dewatering Overburden at Surface Coal Mines

    Abstract: Typical sedimentary sequences overlying coal seams consist of interbedded sandstones, siltstones, shales, and rider coal seams. In many surface coal mine settings, these sediments are saturated; and prior dewatering of them is necessary for effective and economic mining, including the stacking of saturated spoils. Such sedimentary sections usually have a very low vertical ...


    By Itasca International, Inc

  • Mine Dewatering in a Compartmentalized Hydrogeologic Setting at Sishen Mine in South Africa

    Abstract: Sishen mine in South Africa is one of the largest open-pit iron mines in the world. It is characterized by a complex, compartmentalized hydrogeologic setting that comprised numerous dykes, regional water-bearing faults, and inter-bedded localized geologic units. The groundwater flow in the vicinity is mainly controlled by regional dykes and faults in a karst aquifer. A 3-D ...


    By Itasca International, Inc

  • Use of a Finite Element Code to Model Complex Mine Water Problems

    Abstract: Numerical models are now used routinely to predict ground-water inflows to both surface and underground mines and to help design dewatering systems. Two of the more complex problems encountered in mine dewatering are 1) predicting the configuration of the phreatic surface and height of the seepage face in pit highwalls for slope stability analysis and 2) predicting inflow to ...


    By Itasca International, Inc

  • Quantifying the Effect of Localized Depressurization on a Deep Underground Ore Body at the Mcarthur River Mine through Cross Hole Hydraulic Testing and Groundwater Modeling

    Abstract: The McArthur River mine in northern Saskatchewan is the largest single producer of uranium in the world. Most of the ore is extracted by raisebore mining methods at depths of 530 to 600 m below ground surface where pore pressures in the fractured host sandstone and gneiss are on the order of 5 MPa. Currently, ground freezing is used to isolate the ore from ground-water sources. ...


    By Itasca International, Inc

  • Using MINEDWto simulate pore pressure as input for FLAC3Dand 3DEC

    It has become common practice to create a three-dimensional (3-D) geomechanical model for the analysis of rock stability. One of the key inputs for a geomechanical model is the 3-D pore-pressure distribution. For complicated geologic settings under excavation, such as open pit walls and underground mine workings, pore pressures generally do not follow hydrostatic distributions with depth; ...


    By Itasca International, Inc

  • Karowe Mine Groundwater Flow Model and Predictive Dewatering Simulations - Case Study

    Project Description Karowe Mine, located approximately 16 kilometers (km) southwest of the town of Letlhakane, is a diamond mine where the second largest diamond ever found on record, with a weight of 1,111 carats, was discovered. This project involved simulating mine dewatering and excavation to evaluate future dewatering requirements, as well as providing guidance for future monitoring ...


    By Itasca International, Inc

  • Testing the upper limits - Case Study

    PROJECT BACKGROUND For two days, hydrogeologist Lee Florea and his fellow explorers have been slowly plodding step by step to the top of Washington’s Mount Rainier. Laden with up to 80 pounds of supplies and scientific gear, they watch enviously as recreational climbers cruise past them carrying half that on their path to the summit. But there’s a big difference ...


    By In-Situ, Inc.

  • Bee Branch Creek Restoration Project - Case Study

    Project Location: Dubuque, Iowa Owner: Upper Bee Branch Creek-Channel, Streets, and Utilities GC: Tschiggfrie Excavating Project Revenue: 200,000,000 Project Start and End Date: July 2015 SUMMARY The City of Dubuque’s Bee Branch Creek Restoration Project was awarded a 2018 Eddy Award. The ...

  • Reconsidering horizontal to vertical well ratios for site clean-up

    Directional drilling has been used for a variety of purposes; utilities, dewatering, and remedial activities. Cutting costs for remedial activities it is always of consideration. What the costs are to clean-up a site via traditional vertical extraction wells versus using a horizontal well system needs to be reconsidered based upon todays remedial challenges. Traditionally, it has been stated that ...


    By EN Rx, Inc.

  • Passive seismic HVSR surveying for groundwater exploration at the Chilalo Graphite Project, Tanzania

    Summary Passive seismic HVSR surveying is increasingly being used for investigating the thickness of soft sedimentary cover deposits sitting over hard and fresh bedrock, and for direct drill targeting of paleochannels for groundwater and brine resources. A detailed passive seismic HVSR survey was carried out at the Chilalo Graphite Project in SE Tanzania to assist with defining the thickness ...


    By MoHo s.r.l.

  • Lost Hill Utility District 46 Widening

    Project Location: Lost Hill, California Engineer: CannonCorp Owner: CannonCorp GC: Todd Companies Project Dates: May 2018 – June 2018 ...

  • WMU Field Course Preps Future Hydrogeologists with Hands-On Experience

    Overview Students from around the country sign up for the Hydrogeology Field Course at Western Michigan University in order to gain experience with equipment and applications that will prepare them for the workplace in ways a textbook never could. Challenge In a competitive job market, it stands to reason that students who graduate with the most practical experience in their field will have an ...


    By In-Situ, Inc.

  • Water Crisis in Jordan

    Facing severe drought and needs of refugees, the country is digging deep for freshwater resources Jordan, one of the driest countries on earth, is said to be experiencing its worst drought in 900 years. Its baseline water supply is inadequate and becoming worse with climate change. And, since the eruption of war and political unrest in the region, it has been difficult to name another ...


    By Fluence Corporation

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