Hemlo Mining Corp.

Hemlo Mining Contains Underground Outage, Awaits $250,000 Substation

Hemlo Mining Contains Underground Outage, Awaits $250,000 Substation

Toronto – September 18, 2026 -- Hemlo Mining Corp. (TSX: HMMC) (OTCQX: HMMCF) confirmed a temporary electrical outage on September 18, 2026, at an underground substation feeding the Alimak production area on the 9765 level of its flagship Hemlo Gold Mine in northwestern Ontario, with no injuries reported and all underground personnel safely evacuated.

A replacement substation ordered under a critical spare parts audit is due in December 2026 at an estimated cost of US$250,000

The company had pre-ordered the replacement unit before the failure occurred, a move that now shortens the repair timeline. In the interim, technical teams have installed a temporary electrical bypass that restores power to the affected zone at reduced capacity, allowing some mining to continue while development and exploration work remains constrained.

Hemlo Mining Reports 89.9 g/t Gold at South-Rim Zone Near C-Zone

Hemlo Mining Reports 89.9 g/t Gold at South-Rim Zone Near C-Zone

Toronto – September 16, 2026 -- Hemlo Mining Corp. (TSX: HMMC; OTCQX: HMMCF) has returned new assay results from its South-Rim Zone at the Hemlo Gold Mine near Marathon, Ontario, including 89.89 g/t Au over 3.0 metres in hole 6702608, 14.81 g/t Au over 10.0 metres in hole 6702632, and 12.97 g/t Au over 7.0 metres in hole 6702615.

Drilling confirms 500 metres of high-grade mineralization within a 1.5-kilometre target zone

The 2026 program has now demonstrated approximately 500 metres of high-grade mineralization within the interpreted 1.5-kilometre South-Rim horizon, leaving roughly 1 kilometre of additional extent still to be tested. The zone sits just 50 to 150 metres from active C-Zone mining and existing underground infrastructure, a proximity the Company says could lower capital costs and shorten development timelines by leveraging current access rather than new infrastructure.