Geomechanics.io

  • Free Tools
Sign UpLog In

Geomechanics.io

Geomechanics, Streamlined.

© 2026 Geomechanics.io. All rights reserved.

Geomechanics.io

CMRR-ioGEODB-ioHYDROGEO-ioQCDB-ioFree Tools & CalculatorsBlogLatest Industry News

Industries

MiningConstructionTunnelling

Company

Terms of UsePrivacy PolicyLinkedIn
    Projects

    Dakota Gold’s Richmond Hill: step-out drilling and NPV lens for mine planners

    March 18, 2026|

    Reviewed by Tom Sullivan

    Dakota Gold’s Richmond Hill: step-out drilling and NPV lens for mine planners

    First reported on MINING.com

    30 Second Briefing

    New drilling at Dakota Gold’s Richmond Hill oxide heap-leach project in South Dakota has extended mineralisation at least 260 metres north of the current measured and indicated boundary, with step-out hole RH25C-359 cutting 13 metres at 3.14 g/t gold and 10.57 g/t silver from 99 metres depth, open in all directions. Additional intercepts include 6 metres at 2.53 g/t gold from 55 metres in BG-GW-11 and 9 metres at 1.42 g/t gold from 37 metres in BG-GW-13, feeding into a 2026 pre-feasibility and reserve declaration. The project currently hosts 244.7 million measured and indicated tonnes at 0.46 g/t gold and 4.83 g/t silver, underpinning a 28-year mine life and post-tax NPV of $1.6–2.1 billion with a 55–59% IRR and $384 million initial capex.

    Technical Brief

    • 7,565 metres drilled since Jan. 1, nearly half of Dakota Gold’s full-year drilling budget.
    • The exploration campaign includes 109 holes covering 15,481 metres, consisting of a combination of infill, expansion, geotechnical and mine plan drilling.
    • Last year’s drill campaign included 242 holes over 29,524 metres.
    • Richmond Hill sits in the historic Homestake mining district, which has produced more than 40 million oz. gold over its 145-year history.
    • Richmond Hill could produce 2.6 million to 3.9 million oz. of gold over a potential mine life of 28 years, according to an S-K 1300 Initial Assessment report from July.
    • Dakota Gold’s CEO, Robert Quartermain, previously built Pretium Resources and developed the Brucejack mine in British Columbia before agreeing to be bought by Newcrest – now Newmont Mining – for about C$3.5 billion.

    Our Take

    With a projected post-tax NPV of US$1.6–2.1 billion against initial costs of US$384 million, Richmond Hill screens as one of the stronger economic profiles among gold Projects pieces in our database, which is likely to keep Dakota Gold on the radar of larger producers already active in the USA.

    The combination of low-grade bulk-tonnage resources at Richmond Hill (0.46 g/t Au M&I) and the Homestake district’s 40 Moz historic output suggests operators will need to lean heavily on heap-leach efficiency and tight operating cost control to defend margins if gold prices soften.

    Targeting reserves by 2026 and first production in 2029 puts Dakota Gold’s South Dakota asset on a similar development horizon to several other North American gold projects in our coverage, which could intensify competition for engineering contractors and skilled labour in the mid- to late-2020s.

    Geotechnical Software for Modern Teams

    Centralise site data, logs, and lab results with GEODB-io, CMRR-io, and HYDROGEO-io.

    No credit card required.

    • Save and export unlimited calculations
    • Advanced data visualisation
    • Generate professional PDF reports
    • Cloud storage for all your projects

    Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.

    Related Articles

    Next generation of mining in Australia: integrated digital systems for engineers
    Mining
    about 9 hours ago

    Next generation of mining in Australia: integrated digital systems for engineers

    Artificial intelligence, automation, connected data and cybersecurity are converging in Australian mining operations, moving beyond isolated pilots towards integrated digital ecosystems across pits, plants and rail. Examples include autonomous haulage fleets linked to fleet management systems, AI-driven drill and blast design, and digital twins fed by real-time sensor data from crushers, conveyors and processing circuits. The direction of travel is towards interoperable platforms rather than single-vendor silos, with implications for data architecture, control system integration and cyber-resilience in brownfield and greenfield projects.

    Victory Metals’ North Stanmore rare earths: defence offtake lens for miners
    Mining
    about 9 hours ago

    Victory Metals’ North Stanmore rare earths: defence offtake lens for miners

    Victory Metals is pitching its North Stanmore heavy rare earth project in Western Australia to the US defence sector at the Defense Industrial Base Accelerator (DIBX) 2026 in Philadelphia, with chief executive Brendan Clark seeking to embed the asset in allied critical minerals supply chains. The company is targeting defence-grade demand for heavy rare earths used in permanent magnets for missiles, radars and other high-specification systems, positioning North Stanmore as a non-Chinese source. For miners and processors, the move signals growing scrutiny on provenance, offtake security and processing routes suitable for defence qualification.

    Silver Mines board reshaped at Bowdens: DFS execution signals for project engineers
    Mining
    about 9 hours ago

    Silver Mines board reshaped at Bowdens: DFS execution signals for project engineers

    Silver Mines has reshaped its board at the Bowdens Silver Project in New South Wales, appointing mining executive Nicole Brook and former federal resources minister Joel Fitzgibbon as independent non-executive directors following completion of the project’s Definitive Feasibility Study (DFS). The DFS locks in the technical and economic case for what is billed as Australia’s largest undeveloped silver deposit, giving lenders and regulators a clearer basis for approvals and project finance. For engineers, the move signals progression from study to execution planning, with board-level backing for detailed design, procurement and construction decisions.

    Related Industries & Products

    Mining

    Geotechnical software solutions for mining operations including CMRR analysis, hydrogeological testing, and data management.

    CMRR-io

    Streamline coal mine roof stability assessments with our cloud-based CMRR software featuring automated calculations, multi-scenario analysis, and collaborative workflows.

    HYDROGEO-io

    Comprehensive hydrogeological testing platform for managing, analysing, and reporting on packer tests, lugeon values, and hydraulic conductivity assessments.

    GEODB-io

    Centralised geotechnical data management solution for storing, accessing, and analysing all your site investigation and material testing data.

    AllGeotechnicalInfrastructureHazardsEnvironmental