JDS provided comprehensive underground mining services including construction activities (grizzly installation, ore pass rehabilitation, concrete plugs, dewatering stations, weirs, brattices, rollup doors, mine rehabilitation, drawbell construction, steel ventilation and fire doors, surge tanks, raise bore setups and covering), development activities (mechanized ramp and lateral development support, cable bolting, service installation, conventional mining of cutouts and safety bays), production activities (haulage), and Technical Support (survey, ground Support and Construction QA/QC, mine planning, project coordination and support).

$20M+ Kamloops, BC

JDS provided client representatives for construction management and underground mining services for approximately 2.3km of exploration drift development at Maya Gold & Silver's Zgounder Mine in Morocco. The 4.5m x 4.5m access tunnel enables lower-level drilling to expand proven resources. JDS deployed a combination of expatriate and local miners using mechanized mining and conventional jackleg bolting methods, engaged the local community for mining support and equipment supply where feasible, and provided required underground equipment for project completion.

Guerrero State, Mexico

JDS developed a comprehensive restart plan for Bul River Mine to achieve safe, sustainable commercial production within budget. Work focused on developing mine and waste management plans for permitting and operations, auditing existing facilities, managing necessary test work, and creating a project execution plan and budget for commercial production. JDS led the permit application submission to restart mine, mill, and tailings facility operations.

$1M Cranbrook, BC

JDS completed a Feasibility Study for Argonaut Gold's Magino property, building on the 2016 Revised PFS. Key improvements included increasing processing capacity from 12,500 tpd to 30,000 tpd, significantly expanding reserves through a land swap with Richmont Mines and additional drilling, optimizing pit slopes to reduce strip ratio, and front-loading higher-grade material processing while stockpiling lower-grade ore. Economic highlights: after-tax NPV5% of US$321M, 19.5% IRR, 3.8-year payback, US$292M pre-production capex, and US$84M sustaining and closure costs.

$2.7M Wawa, Ontario

JDS managed the Preliminary Economic Assessment and NI 43-101 report for Fireweed's Macmillan Pass Project. The scope included geotechnical analysis, open pit and underground mine design and planning, metallurgical test program management, process plant and infrastructure design, and complete CAPEX/OPEX estimation. The PEA outlined combined open pit and underground mining of 32.7Mt at 4,900 tpd over an 18-year mine life. Economic highlights: after-tax NPV8% of $448M, 23.5% IRR, and 4.0-year payback.

$700K Yukon Territory

JDS managed the Preliminary Economic Assessment and NI 43-101 report for ZincX's Akie Project. The scope included underground geotechnical analysis, mine design and planning, metallurgical test program management, process plant and infrastructure design, and complete CAPEX/OPEX estimation. The PEA outlined a 4,000 tpd underground mine with 3,000 tpd dense media separation (DMS) concentrator, producing 25.8 million tonnes over an 18-year mine life. Economic highlights: after-tax NPV7% of $401M, 27% IRR, and 3.2-year payback.

$350K British Columbia

JDS led the Feasibility Study for Dalradian Resources' Curraghinalt gold project in Northern Ireland, starting in 2015. The multi-million ounce, narrow-vein underground project benefits from a safe jurisdiction with abundant infrastructure and skilled labor. JDS aligned the study with high operating margins and low capital development costs to deliver a safe, attractive project. JDS managed all study aspects including third-party consultants to ensure efficient, fit-for-purpose outcomes meeting permitting requirements, and provided technical support for the Environmental Assessment process.

$2M Northern Ireland

JDS completed a Feasibility Study and NI 43-101 technical report for Continental Gold's (CGI) Buriticá Project in Colombia, published February 2016 on budget and on schedule. Highlights include: 31% after-tax IRR at $1,200/oz gold (38% at $1,400/oz), 2.3-year payback ($1,200/oz gold), $389M capex, average annual production of 282,000 oz gold and 494,000 oz silver in first 5 years at $387/oz cash cost (with silver credits), 14-year mine life producing 3.5M oz gold and 6.4M oz silver from 13.7M tonnes at 8.4 g/t gold and 24.3 g/t silver. JDS continues supporting financing, Colombian permitting, and critical engineering advancement.

$5M Colombia

JDS provided EPCM services and life-of-mine planning for Formation Metals' Idaho Cobalt Project at 8,000' elevation, 40km west of Salmon, Idaho. Mine scope included site access, 1,800m decline development, portal infrastructure, 1,000' tramway, 800 tpd mill and concentrator, dry stack tailings, and water management. The Sunshine Refinery addition in Kellogg included a 30,000 sq ft cobalt process plant for 99.7% purity cobalt production with copper and gold byproducts. Project suspended mid-construction due to financing constraints.

$150M Idaho, USA

JDS managed construction of Eldorado Gold's 25,000 tpd gold plant at Efemçukuru, Turkey, starting March 2009. The scope included plant layout review and revision, oversight of design work with local engineering firms, and complete procurement and logistics management of equipment and materials. JDS's lean construction management team supervised all aspects including cost control, scheduling, health and safety, and environmental management for the $200M Efemçukuru project and $60M Kişladağ expansion.

$260M Izmir, Turkey

JDS provided feasibility study support and full EPCM services for Capstone's Minto Mine, delivering a 1,400 tpd copper-gold process plant from acquisition (mid-2005) to commercial production (June 2007). The $100M project included mine development, dry stack tailings facility, custom Yukon River barge, airstrip, 3MW power plant, 130-person camp, and supporting infrastructure. JDS managed detailed engineering through Hatch and EBA, procurement, construction via Clark Builders and Pelly Construction, and commissioning—all on schedule and on budget.

JDS subsequently completed EPCM for two expansions: first to 2,600 tpd with water filtration for environmental discharge, then to 3,500 tpd. Both expansions were delivered on schedule and on budget.

Yukon Territory

JDS expanded Aranzazu's process plant production from 1,200 to 2,600 tpd in Mexico. The scope included installation of three-stage crushing, extensive conveyor systems, three refurbished ball mills, regrind mill and circuit, refurbishment of four flotation banks and eight scavenger cells, lime slaker system, tailings thickener, and complete electrical, control, and piping systems. Additional infrastructure included tailings dam, concrete plant, administration building, and mine dry. JDS also completed underground mine planning and operations review. The project was delivered on budget and on schedule using managed local contractors.

$36M Zacatecas, Mexico

JDS led design and construction of the Naranjo Alto tailings facility for Nyrstar with a $32M budget, one-year timeline, and 900,000 m³ earthworks including HDPE liner installation. JDS procured and mentored local contractors to achieve budget and schedule targets. Following a project design review, JDS managed staging optimization that reduced initial capital costs to $6.2M by lowering initial elevation and limiting liner to the downstream face only. JDS also managed an expansion raise lift to the existing tailings pond. All work was completed under budget and on schedule.

$20M Guerrero, Mexico

JDS provided engineering and construction management for Newmont's Hope Bay Phase I 800 tpd mine and mill, designed for future expansion to 3,200 tpd. The year-round northern construction program included a Boeing 737-capable airstrip, frozen core tailings dam, 6,000 m² mill foundation and building, prefabricated mill from South Africa, 12 MW power plant, 27.5M liters diesel storage, pipelines, camp facilities, and supporting infrastructure for anticipated April 2014 production. Newmont placed the project on care and maintenance in February 2012.

$150M Nunavut, Canada

JDS delivered a turnkey 2,400 tpd magnetite processing plant for Canadian International Ltd. to supply media-grade magnetite to Western Canadian coal producers. The design-build-operate project included metallurgical testwork, process flowsheet development, detailed engineering management, procurement of all equipment including a used ball mill, construction and commissioning management, HSE program implementation, and daily plant operations. The project was completed on budget, on schedule, with zero incidents.

$22M Mt. Polley Mine, BC

JDS transformed a sub-economic diamond project into a viable $750M development through re-scoping studies that optimized waste management, processing rates, and execution strategy. JDS produced the Definitive Feasibility Study and partnered with Hatch to deliver EPCM services for the remote fly-in mine, accessible by 420km ice road only 2 months annually. Construction included complete processing facilities, 14MW power plant, 450-person camp, jet-capable aerodrome, 3M m³ earthworks, 25M BCM dewatering, and 8M BCM pre-stripping. The 3.5M workforce-hour project was completed safely, on budget, on schedule, with first ore delivered June 14, 2016.

Northwest Territories

JDS confirmed the large silver-rich "super pit" zone for Metallic Ventures (later acquired by Alexco), managed a 30,000-meter, $4M drilling program, oversaw assaying, and completed a revised NI 43-101 technical report for resource estimation. Metallurgical advances enabling sulfuric acid leaching of oxide zinc with electrolytic reduction shifted exploration focus to oxide zinc mineralization. JDS completed and published the PEA in October 2013 demonstrating strong economics: pre-tax NPV5% of $463M, 26.9% IRR, and $297M pre-production capex.

$800K Coahuila, Mexico

JDS completed expansion of the remote Skagway, Alaska terminal facility, including demolition of existing structures, environmental stewardship, lead abatement program, and compliance with Alaska Industrial Development and Export Authority (AIDEA) requirements. JDS developed and executed proper handling and disposal procedures for contaminated structures, implemented comprehensive HSE programs, and managed local contractors for construction, operation, and maintenance of all electrical, mechanical, and structural systems. The project was completed on time, on budget, with zero incidents.

$2.4M Skagway, Alaska

JDS managed the complete relocation and transport of processing equipment to Guyana Goldfields' Buckhall site. The scope included preparing equipment for shipment (adding members, reducing module sizes, containerizing), sourcing vessels, quayside loading oversight, laydown preparation, and Georgetown-to-Buckhall transportation. Due to the oversize modules exceeding Guyana's port capacity, JDS executed an innovative solution: discharging breakbulk cargo port-side to moored barges, then transporting 70km down the Demerara and Essequibo Rivers to Buckhall. The project was completed in 2.5 months including 16 days sailing time.

$2.5M USD Durban, South Africa

JDS delivered design-build, self-perform services for Hope Brook Mining Limited's comprehensive tailings and water management system in 2013. The project included over 12km of HDPE pipeline transporting tailings to a new Cyclone Sand Plant for coarse sand separation and dam construction material, installation of 600hp and 200hp booster pumps, a complete CSP facility with pre-engineered building, new reclaim water barge and pump infrastructure at TMF-3, 5km of reclaim water pipeline, seepage control systems, and 5.5km of 13.8kV overhead power line. The project was completed on time, under budget, with zero lost-time injuries.

$13M Houston, British Columbia