Land, Location, and Climate

The Snowstorm Project includes 964 unpatented lode mining claims, roughly 2,245 hectares of leased private lands and 32.45 hectares of land owned by Snowstorm Exploration LLC, totaling about 10,281 hectares, or approximately 102.8 square kilometers. The claims and private lands are in the northern Snowstorm Mountains and the pediment area immediately south and east of Chimney Reservoir in Humboldt and Elko Counties, Nevada.  Snowstorm is about 90 km northeast of Winnemucca, NV, 6 km northeast of the Twin Creek Mine and 15 km northeast of the Turquoise Ridge Mine both operated by the Nevada Gold Mines LLC.

The climate at Snowstorm is semi-arid, with total annual precipitation averaging 510 millimeters, most accumulating as snow in the months of January and February. Relative humidity is generally very low. Throughout the year, daytime temperatures can be moderate or hot with significant cooling at night.  The operating season is year-round and unaffected by temperature variations. Precipitation generally does not affect operating conditions, but surface roads can become temporarily impassable when wet.

The scientific and technical information in respect of the KSM Project herein was derived from the technical Report entitled KSM (Kerr – Sulphurets – Mitchell) Prefeasibility Study and Preliminary Economic Assessment dated effective August 8, 2022. This information was prepared by leading consulting firms and their Qualified Persons (as defined in NI 43-101), all of who are independent of Seabridge and are listed below along with their areas of responsibility:
(i) Tetra Tech, Inc. under the direction of Hassan Ghaffari P.Eng (surface infrastructure, capital estimate and financial analysis), John Huang P.Eng. (metallurgical testing review, permanent water treatment, mineral process design and operating cost estimation for process, general and administrative (“G&A”) and site services, and overall report preparation)
(ii) Wood Canada Limited, under the direction of Henry Kim P.Geo. (Mineral Resources)
(iii) Moose Mountain Technical Services under the direction of Jim Gray P.Eng. (open pit Mineral Reserves, open pit mining operations, mine capital and mine operating costs, MTT and rail ore conveyance design, tunnel capital costs)
(iv) N. Brazier Associates Inc. under the direction of W.N. Brazier P.Eng. (Electrical power supply, energy recovery plants)
(v) ERM Consultants Canada Ltd. under the direction of Rolf Schmitt P.Geo. (environment and permitting)
(vi) Klohn Crippen Berger Ltd. under the direction of David Willms P.Eng (design of surface water diversions, diversion tunnels, tailing management facility, water treatment dam and RSF and tunnel geotechnical)
(vii) BGC Engineering Inc. under the direction of Derek Kinakin P.Geo., P.L.Eng., P.G. (rock mechanics, geohazards and mining pit slopes)
(viii) WSP Golder Inc., under the direction of Ross Hammett P.Eng (Block Cave mining)