Sixty North Gold Mining Ltd. Progresses Mon Gold Mine Development in Northwest Territories, Maintaining On-Track Production Schedule

Camp Mobilization and Infrastructure Progress at Mon Gold Mine

Sixty North Gold reported active on-site crews assembling the mining camp and infrastructure at the Mon Gold Mine, allocating 3 to 4 weeks for this initial mobilization phase. This marks a significant transition from the earlier Advanced Exploration Plan, governed by a board directive dated October 24, 2022, toward full-scale production.

The camp and infrastructure setup is essential for supporting ongoing operations. With personnel already mobilized, the company is maintaining momentum to ensure efficient progression of subsequent development phases once regulatory approvals are secured.

Timeline for Mill Pad Clearing and Road Construction

The company has received inspector authorization to clear the mill pad of blasted rock and begin road construction to the dry stack tailings facility (DSTF). These activities are scheduled to start within two weeks and are expected to take approximately two weeks to complete. Blasted rock from the mill pad clearing will be repurposed for road building, optimizing resource use on site.

This development phase is critical to preparing the site for mill installation, with the compact two-week schedule reflecting prioritization of operational infrastructure for milling.

Revised Mill Design and Construction Plan Submitted for MVLWB Review

Sixty North Gold has submitted a revised Design and Construction Plan for the mill to the Mackenzie Valley Land and Water Board. Mill assembly is projected to commence following plan approval, with assembly expected to require 9 to 13 weeks. The timeline for the regulatory review has not been disclosed.

The revised plan indicates updates prompted by regulatory feedback or engineering refinements. Approval by the MVLWB is a critical regulatory milestone before initiating mill assembly. The company has engaged external technical experts to support completion of remaining plans, demonstrating commitment to regulatory compliance.

Water Management and Environmental Compliance Efforts

Sixty North Gold is actively consulting with the MVLWB on the water management plan for the Mon Gold Mine. This includes submitting an independent review of 25 years of water sample data, which shows no significant changes in water conditions despite wildfire seasons in 2023 and earlier years.

The company noted drought conditions prior to wildfire seasons resulted in missing data points, complicating regulatory analysis. The 25-year historical review aims to establish a strong baseline and support water management plan approval. The Water and Groundwater Management Plan remains subject to a Board directive requiring two additional years of post-2023 wildfire baseline sampling before full operational approval.

Mining and Milling Equipment On Site and Operational Status

All mining and milling equipment, supplies, and crews are on site actively executing the initial development phases of camp assembly and mill pad clearing. This indicates completion of procurement and mobilization of capital equipment.

The 100 tonnes-per-day (tpd) mill is central to operations, featuring environmentally sustainable technology including a closed two-stage crushing circuit, ball mill grinding to a coarse p80 -150 mesh, and a gravity-flotation recovery process targeting over 95% gold recovery. Tailings will be pressure filtered to remove 80-85% water for recycling, with residual damp sands directed to the dry stack facility.

Regulatory Approval Status and Outstanding Management Plans

All Management Plans have been submitted at least once to the MVLWB. President and CEO Dave Webb stated the company is progressing and confident in meeting requirements to advance toward production. Remaining approvals include sign-off on all Management Plans, with the Water and Groundwater Management Plan being the primary focus due to baseline sampling requirements.

The company operates with support from federal, territorial, and indigenous governments under MVLWB regulations. This multi-jurisdictional framework underscores the Mon Gold Mine’s importance to regional economic development. The MVLWB is finalizing reviews and will request clarifications or revisions as needed.

Archaeological Assessment and First Nations Engagement

In June 2026, Sixty North Gold completed an extensive Archaeological Impact Assessment at the Mon Gold Mine site, expanding on a 2016 Archaeological Overview Assessment that included field visits. This updated assessment aims to assure local First Nations that environmental and cultural impacts will be minimal and acceptable.

The timing and scope highlight the company’s commitment to stakeholder engagement and compliance with indigenous consultation and cultural heritage protection. Completion of this assessment represents a recent regulatory milestone supporting the path to production approval.

Mon Gold Mine Geology and Underground Development Update

The Mon Gold Mine employs selective underground mining via a single 3-meter by 4-meter access portal, with plans for a 2-meter by 2-meter raise for secondary egress. Recent underground development intersected the productive A-Zone 17 meters below historic stopes, confirming ore body continuity at depth. A newly identified DD-Zone exposed in the main ramp is slated for future development.

Development focuses on stope mining in the East Limb, West Limb, and DD Zone, with plans to extend the ramp to access deeper levels. Historically, mining in the 1990s extracted 15,000 tonnes of ore to only 15 meters depth, recovering approximately 15,000 ounces of gold. The recent deeper A-Zone intersection suggests significant additional ore tonnage below historic workings.

Brownfield Development Potential and Regional Gold Belt Significance

Located in the Yellowknife Gold Belt, a historic gold-producing region in the Northwest Territories, the Mon Gold Mine benefits from proximity to established mining infrastructure. The Yellowknife camp has hosted two mines averaging 30 grams per tonne (gpt) gold or higher—the Discovery Mine, which produced one million ounces, and Sixty North Gold’s Mon Mine. Additionally, the Con Mine and Giant Mine averaged 15 gpt or better, producing over 14 million ounces combined.

The company notes historic mines began production at under 100 tpd, a threshold matched or exceeded by Mon Gold Mine’s planned 100 tpd operation. The region’s existing infrastructure, skilled workforce, and services provide operational advantages. Beyond core gold zones, the property contains silver-rich volcanogenic massive sulphide (VMS) deposits, large shear zone-hosted gold targets, and critical-element-enriched iron-oxide copper-gold (IOCG) mineralization, offering future exploration and development opportunities post-production start.

Capital Funding and External Technical Expertise

Sixty North Gold reports being well funded and has engaged external technical experts to assist in finalizing remaining plans for regulatory approval. While specific capital amounts and consultant details were not disclosed, the company’s statement indicates financial readiness to support ongoing development and regulatory processes.

Engagement of external experts aligns with submission of the revised mill Design and Construction Plan and completion of the expanded Archaeological Impact Assessment. This combined internal and external approach is typical for mining projects navigating Canada’s complex regulatory landscape.