Doré Copper Mining Corp. reported positive results from its Preliminary Economic Assessment (“PEA“) for the restart of the Chibougamau mining camp. The PEA supports a hub-and-spoke operation with the high-grade Corner Bay copper-gold deposit as its main underground mine along with the Devlin copper deposit and the former Joe Mann gold mine providing feed to its Copper Rand mill (collectively, the ”Project”).

The PEA demonstrates attractive project economics with optionality for expansion into a significantly larger operation, re-establishing the Chibougamau mining camp as a long-life copper and gold producer. Attractive project economics: Base case metal prices of USD 3.75/lb Cu and USD 1,820/oz Au: Pre-tax NPV8% of CAD 367 million and 30.7% IRR, After-tax NPV8% of CAD 193 million and 22.1% IRR, Spot metal prices of USD 4.20/lb Cu and USD 1,854/oz Au: Pre-tax NPV8% of CAD 555 million and 40.1% IRR After-tax NPV8% of CAD 303 million and 29.4% IRR, Mine life of 10.5 years: Metal production of 492 Mlbs Cu, 142,000 oz Au. Average cash operating costs of USD 1.35/lb CuEq and all-in sustaining costs of USD 2.24/lb CuEq.

Light capital intensity: Initial capital of CAD 180.6 million (including CAD 24 million contingency), translating to a Tier 1 Capital Intensity Index (initial capital /annual CuEq produced) of USD 2.64/lb CuEq or US$0.25/lb CuEq LOM. Scalable operation: Mill has 25% excess grinding capacity (over the maximum annual throughput) providing opportunities to add, discover, or acquire other properties in the Chibougamau mining camp. Long life tailings storage option with minimal environmental impact: Implementation of dry stack tailings and ore sorting technology provides for a maximum capacity of 12 Mt on the existing Copper Rand tailings management facility (“TMF”).

Modernization of the mill and TMF: PEA study modernizes the existing Copper Rand mill and TMF so that they are productive and cost efficient and minimizes impact on the environment. Opportunities for mine life extension:Corner Bay and Joe Mann deposits remain open at depth with strong potential to add additional resources and extend the mine life. Potential for additional mill feed during mine life with the advancement of its exploration projects in Chibougamau mining camp.