SA Seabridge Gold Inc

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

This Prospectus and any Prospectus Supplement, and the documents incorporated by reference into this Prospectus and any Prospectus Supplement, contain forward-looking statements within the meaning of the United States Private Securities Litigation Reform Act of 1995 and forward-looking information within the meaning of Canadian securities laws concerning future events or future performance with respect to the Company’s projects, business approach and plans, including production, capital, operating and cash flow estimates, business transactions such as the potential sale or joint venture of the Company’s KSM Project and Courageous Lake Project (each as defined herein) and the acquisition of interests in mineral properties; requirements for additional capital; the estimation of mineral resources and reserves; and the timing of completion and success of exploration and development activities, community relations, required regulatory and third party consents, permitting and related programs in relation to the KSM Project and Courageous Lake Project. Any statements that express or involve discussions with respect to predictions, expectations, beliefs, plans, projections, objectives or future events or performance (often, but not always, using words or phrases such as “expects”, “anticipates”, “believes”, “plans”, “projects”, “estimates”, “intends”, “strategy”, “goals”, “objectives” or variations thereof or stating that certain actions, events or results “may”, “could”, “would”, “might” or “will” be taken, occur or be achieved, or the negative of any of these terms and similar expressions) are not statements of historical fact and may be forward-looking statements and forward-looking information (collectively referred to in the following information simply as “forward-looking statements”). In addition, statements concerning mineral resource and reserve estimates constitute forward-looking statements to the extent that they involve estimates of the mineralization expected to be encountered if a mineral property is developed and, in the case of reserves, the economics of a proposed mining operation.

Forward-looking statements are necessarily based on estimates and assumptions made by the Company in light of its experience and perception of historical trends, current conditions and expected future developments. In making the forward-looking statements in this Prospectus and any Prospectus Supplement the Company has applied several material assumptions including, but not limited to, the assumption that: (1) market fundamentals will result in sustained demand and prices for gold and copper, and to a much lesser degree, silver and molybdenum; (2) the potential for production at its mineral projects will continue operationally, legally and economically; (3) any additional financing needed will be available on reasonable terms; (4) estimated mineral resources and reserves at the Company’s projects have merit and there is continuity of mineralization as reflected in such estimates; and (5) the Company will receive and maintain all required regulatory approvals required in respect of its projects and this Prospectus.

Forward-looking statements are subject to a variety of known and unknown risks, uncertainties and other factors that could cause actual events or results to differ from those expressed or implied by the forward-looking statements, including, without limitation:

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This list is not exhaustive of the factors that may affect any of the Company’s forward-looking statements. Forward-looking statements are statements about the future and are inherently uncertain, and actual achievements of the Company or other future events or conditions may differ materially from those reflected in the forward-looking statements due to a variety of risks, uncertainties and other factors, including, without limitation, those referred to in this Prospectus under the heading “Risk Factors”, elsewhere in this Prospectus and in documents incorporated by reference herein. In addition, although the Company has attempted to identify important factors that could cause actual achievements, events or conditions to differ materially from those identified in the forward-looking statements, there may be other factors that cause achievements, events or conditions not to be as anticipated, estimated or intended. Many of the foregoing factors are beyond the Company’s ability to control or predict. It is also noted that while the Company engages in exploration and development of its properties, it will not undertake production activities by itself.

These forward-looking statements are based on the beliefs, expectations and opinions of management on the date the statements are made and the Company does not assume any obligation to update forward-looking statements, except as required by applicable securities laws, if circumstances or management’s beliefs, expectations or opinions should change. For the reasons set forth above, forward-looking statements are inherently unreliable, and investors should not place undue reliance on forward-looking statements.

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The forward-looking statements contained in this Prospectus and the documents incorporated by reference herein and therein are qualified by the foregoing cautionary statements.

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However, these documents are not incorporated by reference to the extent their contents are modified or superseded by a statement contained in this Prospectus or in any other subsequently filed document that is also incorporated by reference in this Prospectus. To the extent that any document or information incorporated by reference into this Prospectus is included in a report that is filed with the SEC pursuant to the U.S. Exchange Act, such document or information shall also be deemed to be incorporated by reference as an exhibit to the registration statement (in the case of a report on Form-6K, if and to the extent expressly provided in such report).

Any material change reports (excluding confidential material change reports), any interim and annual consolidated financial statements and related management’s discussion and analysis, proxy circulars (excluding those portions that, pursuant to NI 44-101, are not required to be incorporated by reference herein), any business acquisition reports, and any other disclosure documents required to be filed pursuant to an undertaking to a provincial or territorial securities regulatory authority that are filed by the Company with various securities commissions or similar authorities in Canada after the date of this Prospectus and prior to the termination of this offering, shall be deemed to be incorporated by reference in this Prospectus.

Any statement contained in this Prospectus or in a document incorporated or deemed to be incorporated by reference herein shall be deemed to be modified or superseded for purposes of this Prospectus to the extent that a statement contained herein or in any other subsequently filed document which also is, or is deemed to be, incorporated by reference herein, modifies or supersedes such statement. The modifying or superseding statement need not state that it has modified or superseded a prior statement or include any other information set forth in the document it modifies or supersedes. The making of a modifying or superseding statement shall not be deemed an admission for any purposes that the modified or superseded statement, when made, constituted a misrepresentation, an untrue statement of a material fact or an omission to state a material fact that is required to be stated or that is necessary to make a statement not misleading in light of the circumstances in which it was made. Any statement so modified or superseded shall not constitute a part of this Prospectus, except as so modified or superseded.

References to the Company’s website in any documents that are incorporated by reference into this Prospectus do not incorporate by reference the information on such website into this Prospectus, and the Company disclaims any such incorporation by reference.

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A Prospectus Supplement containing the specific terms of an offering of securities, disclosure of earnings coverage ratios, if applicable, and other information relating to the securities, will be deemed to be incorporated into this Prospectus as of the date of such Prospectus Supplement only for the purpose of the offering of the securities covered by that Prospectus Supplement.

Any “template version” of any “marketing materials” (as such terms are defined in National Instrument 41-101 – General Prospectus Requirements (“NI 41-101”)) pertaining to a distribution of securities will be filed under the Company’s corporate profile on SEDAR at www.sedar.com. In the event that such marketing materials are filed subsequent to the date of filing of the applicable Prospectus Supplement pertaining to the distribution of the securities to which such marketing materials relates and prior to the termination of such distribution, such filed versions of the marketing materials will be deemed to be incorporated by reference into the Prospectus for purposes of future offers and sales of securities hereunder.

Upon a new annual information form and the related audited annual financial statements and management’s discussion and analysis being filed by the Company with, and, where required, accepted by, the applicable securities commissions or similar regulatory authorities during the currency of this Prospectus, the previous annual information form, the previous audited annual financial statements and related management’s discussion and analysis, and all interim financial statements and related management’s discussion and analysis, material change reports and business acquisition reports filed prior to the commencement of the Company’s financial year in which the new annual information form and the related annual financial statements and management’s discussion and analysis are filed shall be deemed no longer to be incorporated into this Prospectus for purposes of further offers and sales of securities hereunder. Upon new interim financial statements and related management’s discussion and analysis being filed by us with the applicable securities commissions or similar regulatory authorities during the currency of this Prospectus, all interim financial statements and related management’s discussion and analysis filed prior to the new interim consolidated financial statements and related management’s discussion and analysis shall be deemed no longer to be incorporated into this Prospectus for purposes of future offers and sales of securities hereunder. Upon a new information circular relating to an annual general meeting of holders of common shares of the Company being filed by us with the applicable securities commissions or similar regulatory authorities during the currency of this Prospectus, the information circular for the preceding annual general meeting of holders of common shares shall be deemed no longer to be incorporated into this Prospectus for purposes of future offers and sales of securities hereunder.

THE COMPANY

The following description of the Company and its business is derived from selected information about the Company contained in the documents incorporated by reference into this Prospectus. This description does not contain all of the information about the Company and its properties and business that you should consider before investing in the Common Shares. You should carefully read the entire Prospectus and any applicable Prospectus Supplement, including the section entitled “Risk Factors”, as well as the documents incorporated by reference into this Prospectus and the applicable Prospectus Supplement, before making an investment decision.

Corporate Information

Seabridge is a gold resource company whose principal properties are the KSM project (for Kerr-Sulphurets-Mitchell) located in Northern British Columbia, Canada (the “KSM Project”) and the Courageous Lake project located in the Northwest Territories, Canada (the “Courageous Lake Project”). The Company exists under the Canada Business Corporations Act.

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The Company presently has twelve wholly-owned subsidiaries: Seabridge Gold (NWT) Inc., a company incorporated under the laws of the Northwest Territories of Canada; Seabridge Gold (KSM) Inc., KSM Mining U.L.C., SnipGold Corp. (“SnipGold”), Hattrick Resources Corp. (“Hattrick”) and Tuksi Mining & Development Company Ltd. (“Tuksi”), companies incorporated under the laws of British Columbia, Canada; Seabridge Gold (Yukon) Inc., incorporated under the laws of Yukon; Seabridge Gold Corporation, Pacific Intermountain Gold Corporation, 5555 Gold Inc. and 555 Silver Inc., each Nevada Corporations; and Snowstorm Exploration LLC, a Delaware limited liability corporation. The following diagram illustrates the inter-corporate relationship between the Company, its active subsidiaries and its projects as of December 31, 2019.

Notes:

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KSM Project

The KSM Project is located within the Iskut-Stikine region of British Columbia, approximately 21 kilometers south-southeast of the former Eskay Creek Mine and approximately 65 kilometers north-northwest of Stewart, British Columbia.

The Current KSM Report

Tetra Tech Canada Inc. (formerly Tetra Tech, Inc.) (“Tetra Tech”) and Wood plc (formerly Amec Foster Wheeler) prepared the technical report entitled “2016 KSM (Kerr-Sulphurets-Mitchell) Prefeasibility Study Update and Preliminary Economic Assessment” with an effective date of October 6, 2016 (the “2016 KSM Report”) in respect of the KSM Project.

In April 2020, Tetra Tech and Wood plc (formerly Amec Foster Wheeler) completed the April 2020 KSM Report in respect of the KSM Project, which included an updated preliminary economic assessment of the KSM Project. This alternate production scenario did not replace the Company’s preliminary feasibility study that was completed in 2016 (the “2016 PFS”), which was confirmed as current and restated in the April 2020 KSM Report.

In November, 2020, Tetra Tech and Wood plc (formerly Amec Foster Wheeler) completed the technical report entitled “KSM (Kerr-Sulphurets-Mitchell) Prefeasibility Study Update, NI 43-101 Technical Report” dated November 9, 2020 but with an effective date of April 30, 2020 (the “Current KSM Report”). The Current KSM Report contains both an updated mineral resource estimate for the KSM Project and the 2016 PFS, including the work done to confirm its currency and is available under the Company’s profile at www.sedar.com.

The Current KSM Report reported that an extensive data verification exercise was conducted on the 2016 PFS to determine whether there had been any material changes to the information used in the 2016 PFS and whether the 2016 PFS could be considered current. The data verification checks used updated resource models with updated process recoveries and escalated cost assumptions and estimated that variances in total mill feed would be limited to +1.3% on mill feed tonnes, no change on gold grade, and +2.4% on copper grade.  These overall differences are not material to the 2016 PFS mineral reserves. The financial results using the 2016 PFS mine plan with updates to capital and operating costs, 3-year average metal prices and tax code revisions are also not materially different from the 2016 PFS financial results. Therefore, the results of the exercise verified that if the 2016 PFS were to be updated using the 2020 information, there would be no material change to outcomes of the 2016 PFS, its capital and operating costs, mineral reserves, or financial analysis. Since the 2016 PFS remains current, it was suitable to be restated unchanged in the Current KSM Report.

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The 2016 PFS was designed to align with regulatory approvals for the KSM Project construction and operation included in federal and provincial Environmental Assessments.  The scope of the 2016 PFS mine design included open pits and underground mines to extract ore from the Mitchell, Sulphurets, Kerr and Iron Cap deposits. Ore is transported through access tunnels to a processing plant located in the Treaty Creek valley nearby provincial infrastructure where it is processed to produce saleable concentrate and doré. Process waste is stored in a tailings management facility.  The 2016 PFS is the only production plan for the KSM Project whose elements have been studied to the higher level of accuracy that must be met to convert mineral resources to mineral reserves and it is the production plan that has received environmental assessment approval.

The Current KSM Report supersedes the 2016 KSM Report and the April 2020 KSM Report and the following summary of the Current KSM Report supersedes the summary of the 2016 KSM Report in the Company’s 2019 AIF and the summary of the April 2020 KSM Report appearing in the Company’s Material Change Report dated May 7, 2020.

The following material in this section summarizes the information in the Current KSM Report.

Location and Climate

The KSM Project is situated about 950 km northwest of Vancouver, 65 km by air north-northwest of Stewart, BC and 21 km south-southeast of the former Eskay Creek Mine. The property is located at latitude 56.50° North and longitude 130.30° West (see Figure 1).

The proposed pit areas lie within the headwaters of Sulphurets Creek, which is a tributary of the Unuk River and flows into the Pacific through Alaska. The proposed process plant and tailings management facility (“TMF”) will be located within the tributaries of Teigen and Treaty Creeks. Teigen and Treaty Creeks are tributaries of the Bell-Irving River, which is itself a major tributary of the Nass River. The Nass river flows to the Pacific Ocean entirely within Canada.

The climate is generally typical of a temperate or northern coastal rainforest, with sub-arctic conditions at high elevations. Precipitation at the mine site has an estimated average of 1,652 mm and at the process plant and TMF area has an estimated average of 1,371 mm. The length of the snow-free season varies from about May through November at lower elevations, and from July through September at higher elevations.

Local Resources, Infrastructure and Physiography

The KSM property lies in the rugged Coastal Mountains of northwest British Columbia, with elevations ranging from 520 meters in Sulphurets Creek valley to over 2,300 meters at the highest peaks. Valley glaciers fill the upper portions of the larger valleys from just below tree line and upwards.

Deep-water loading facilities for shipping bulk mineral concentrates exist in Stewart, and are currently utilized by the Red Chris Mine. Historically they have been used by several other mines in northern, BC. The nearest railway is the CNR Yellowhead route, which is located approximately 220 km southeast of the property. This line runs east-west, and can deliver concentrate to deep-water ports near Prince Rupert and Vancouver, BC.

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There are no settlements or privately owned land in the area of the KSM Project; there is limited commercial recreational activity in the form of helicopter skiing and guided fishing adventures. The closest power transmission lines run along Highway 37, 40 km east of the KSM Project.

Stewart, a town of approximately 500 inhabitants, is the closest population center to the KSM Project. It is connected to the provincial highway system via paved, all weather Highway 37A. The larger population centers of Prince Rupert, Terrace, and Smithers, with a total population of about 32,000, are located approximately 270 km to the southeast.

Exploration History

There is evidence that prospectors were active in the area prior to 1935. The modern exploration history of the area began in the 1960’s, with brief programs conducted by Newmont Mining Corp., Granduc Mines Ltd., Phelps Dodge Corp., and the Meridian Syndicate. All of these programs were focused towards gold exploration. The Sulphurets Zone was first drilled by Esso Minerals in 1969; Kerr was first drilled by Brinco Ltd. in 1985 and Mitchell Creek by Newhawk Gold Mines Ltd. in 1991.

There is no recorded mineral production, nor evidence of it, from the property. Immediately west of the property, small-scale placer gold mining has occurred in Sulphurets and Mitchell Creeks.

During 2003-2005, under its option to earn up to a 65% interest in the project from Seabridge, Falconbridge Ltd. conducted geophysics, surface mapping, surface sampling and completed approximately 4,100 m of drilling at the project.

Since 2006, Seabridge has been conducting exploration and advancement activities at the project.

Geology

The region lies within “Stikinia”, a terrane of Triassic and Jurassic volcanic arcs that were accreted onto the Paleozoic basement. Stikinia is the largest of several fault bounded, allochthonous terranes within the Intermontane belt, which lies between the post-accretionary, Tertiary intrusives of the Coast belt and continental margin sedimentary prisms of the Foreland (Rocky Mountain) belt. In the Kerr-Sulphurets area, Stikinia is dominated by variably deformed, oceanic island arc complexes of the Triassic Stuhini and Jurassic Hazelton groups. Backarc basins formed eastward of the KSM property in the Late Jurassic and Cretaceous were filled with thick accumulations of fine black clastic sediments of the Bowser Group. Folding and thrusting due to sinistral transpression tectonics in the mid-Cretaceous followed by extensional conditions generated the area’s current structural features. The most important structure is the north-northeast striking, moderately west-northwest dipping Sulphurets Thrust Fault (“STF”), which transects the property and is spatially and genetically related to mineralization at KSM. Remnants of Quaternary basaltic eruptions occur throughout the region.

Early Jurassic sub-volcanic intrusive complexes are common in the Stikinia terrane, and several host well- known precious and base metal rich hydrothermal systems. These include copper-gold porphyry deposits such as Galore Creek, Red Chris, Kemess, Mt. Milligan, and Kerr-Sulphurets. In addition, there are a number of related polymetallic deposits including skarns at Premier, epithermal veins and subaqueous vein and replacement sulfide deposits at Eskay Creek, Snip, Brucejack, and Granduc.

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The Kerr deposit is a strongly-deformed copper-gold porphyry, where copper and gold grades have been upgraded due to remobilization of metals during later and/or possibly syn-intrusive deformation. Alteration is the result of a relatively shallow, long lived hydrothermal system generated by intrusion of monzonite. Subsequent deformation along the STF was diverted into the Kerr area along pre-existing structures. The mineralized area forms a fairly continuous, north-south trending west dipping irregular body measuring about 1,700 m long and up to 200 m thick. Deep drilling since 2012 has identified two sub-parallel, north-south trending, steep west-dipping mineralized zones that appear to coalesce near the topographic surface. After significant deep drilling was completed at the Kerr deposit, an updated geological interpretation and subsequent updated mineral resource model were completed. That new model forms the basis for the 2016 mineral resources and mineral reserves.

The Sulphurets deposit comprises two distinct zones referred to as the Raewyn Copper-Gold Zone and the Breccia Gold Zone. The Raewyn Copper-Gold Zone hosts mostly porphyry style disseminated chalcopyrite and associated gold mineralization in moderately quartz stockworked, chlorite-biotite-sericite-magnetite altered volcanics. The Raewyn Copper-Gold Zone strikes north-easterly and dips about 45° to the northwest. The Breccia Gold Zone hosts mostly gold-bearing pyritic material mineralization with minor chalcopyrite and sulfosalts in a potassium-feldspar-siliceous hydrothermal breccia that apparently crosscuts the Raewyn Copper-Gold Zone. The Breccia Gold Zone strikes northerly and dips westerly.

The Mitchell Zone is underlain by foliated, schistose, intrusive, volcanic, and clastic rocks that are exposed in an erosional window below the shallow north dipping Mitchell Thrust Fault (MTF). These rocks tend to be intensely altered and characterized by abundant sericite and pyrite with numerous quartz stockwork veins and sheeted quartz veins (phyllic alteration) that are often deformed and flattened. Towards the west end of the zone, the extent and intensity of phyllic alteration diminishes and chlorite-magnetite alteration becomes more dominant along with lower contained metal grades. In the core of the zone, pyrite content ranges between 1 to 20%, averages 5%, and typically occurs as fine disseminations. Gold and copper tends to be relatively low-grade but is dispersed over a very large area and related to hydrothermal activity associated with Early Jurassic hypabyssal porphyritic intrusions. In general, within the currently drilled limits of the Mitchell Zone, gold and copper grades are remarkably consistent between drill holes, which is common with a large, stable, and long-lived hydrothermal systems.

The Iron Cap Zone, which is located about 2,300 m northeast of the Mitchell Zone, is well exposed and consists of intensely altered intrusive, sedimentary, and volcanic rocks. The Iron Cap deposit is a separate, distinct mineralized zone within the KSM district. It is thought to be related to the other mineralized zones but differs in that much of the host rock is hydrothermally altered intrusive (porphyritic monzonite to diorite) rather than altered volcanic and sedimentary rocks. There is a high degree of silicification that overprints earlier potassic and chloritic alteration. Intense phyllic alteration and high density of stockwork veining, which are pervasive at the nearby Mitchell Zone, are less pervasive at Iron Cap. The surface expression of the Iron Cap Zone measures about 1,500 m (northeast-southwest) by 600 m (northwest- southeast). Significant drilling has been completed at the Iron Cap deposit since Company’s preliminary feasibility study for the KSM Project completed in June, 2012 (the “2012 KSM PFS Report”), which resulted in an updated geological interpretation and subsequent updated mineral resource model that forms the basis for the 2016 mineral resources and mineral reserves.

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Security of Samples

The Company follows an ongoing and rigorous sample preparation, security, quality control/quality assurance protocol for its exploration programs, including blank and reference standards in every batch of assays. Cross-check analyses are conducted at a second external laboratory on no less than 10% of the samples. The details of these procedures are outlined in the Current KSM Report.

Mineral Resources

The Current KSM Report includes updated mineral resource estimates for the KSM Project, which are based on block models that were constructed for each deposit following major drilling campaigns. The Kerr, Sulphurets, Mitchell, and Iron Cap models were constructed after the 2016, 2018, 2017, and 2018 drilling campaigns, respectively. Block NSR values were updated in late 2019 for all deposits. Resource Modeling Inc. constructed 3D block models for the four mineralized zones using inverse distance (Kerr and Mitchell) and ordinary kriging (Sulphurets and Iron Cap). A variety of lithologic, alteration, structural, and grade wire frames were used in the estimation process. 3D search ellipses and trend planes oriented with the trend of mineralization were used to find eligible drill hole composites that were used to estimate block grades. The block estimates were classified into measured (Mitchell only), indicated, and inferred categories using mineralized continuity, proximity to drilling, and the number of holes used to estimate the blocks. Mineral resources for the KSM Project were determined by using a combination of conceptual open pit and underground mining methods.

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Measured and indicated mineral resources at the KSM Project are estimated at 3.0 Bt grading 0.52 grams per tonne (g/t) gold, 0.21% copper and 2.8 g/t silver (50.4 million ounces of gold, 14.2 billion pounds of copper and 269.7 million ounces of silver), inclusive of mineral reserves. An additional 4.6 Bt are estimated in the inferred mineral resource category grading 0.38 g/t gold, 0.32% copper and 2.2 g/t silver (56.9 million ounces of gold and 32.1 billion pounds of copper and 331.2 million ounces of silver). Metal prices of US$1,300 per ounce gold, US$3.00 per pound copper, and US$20.00 per ounce silver with a foreign exchange rate of US$ 0.83 per C$1.00 are used in calculating the various cut-offs applied to the KSM Project’s mineral resource estimates. A detailed breakdown of the KSM Project’s mineral resources as of December 31, 2019 are as follows:

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Notes: Mineral Resources have an effective date of December 31. 2019. The 2019 Sulphurets drill holes were not used in the construction of the resource model but were used to validate the interpretations of the model. Mineral Resources that are not Mineral Reserves do not have demonstrated economic viability. It is reasonably expected that the majority of Inferred Mineral Resources could be upgraded to Indicated Mineral Resources with continued exploration. The Mineral Resources are inclusive of Mineral Reserves. Numbers may not add due to precision and roundoff of tonnes and grade.

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Metallurgical Test Review

Several wide-ranging metallurgical test programs were carried out between 2007 and 2016 to assess the metallurgical responses of the mineral samples from the KSM deposits, especially the samples from the Mitchell deposit.

The metallurgical tests to date include:

The test results indicate that the mineral samples from the four separate mineralized deposits are amenable to the flotation-cyanidation combined process. The process consists of:

The samples from the Mitchell deposit produced better metallurgical results with the chosen flotation and cyanide leach extraction circuits when compared to the metallurgical results from the samples taken from the Sulphurets, Iron Cap, and Kerr (upper zone) deposits. The locked cycle tests showed that, on average, approximately 85% of copper and 60% of gold in the Mitchell samples, which contain 0.21% Cu and 0.72 g/t Au, were recovered into a concentrate containing 24.8% Cu. The cyanidation further recovered approximately 18% of the gold from the gold bearing products consisting of the cleaner flotation tailing and the gold bearing pyrite flotation concentrate.

For the Sulphurets, Iron Cap, and upper Kerr samples, the average head grades of the tested samples fluctuated from 0.25 to 0.62% for copper and 0.23 to 0.60 g/t for gold. The average recoveries reporting to flotation concentrates ranged from 78% to 85% for copper and 41 to 60% for gold. The average copper grades of the concentrates varied from 24 to 28%. The cyanidation further recovered approximately 15 to 29% of the gold from the gold-bearing products.

The testing programs from 2017 to 2020 show the following:

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Mineral Processing

The 2016 PFS processing plant is designed based on the flowsheet developed from the testwork results. The proposed flotation process is projected to produce a copper-gold concentrate containing approximately 25% copper. Copper and gold flotation recoveries will vary with changes in head grade and mineralogy. For the life of mine (“LOM”) mill feed containing 0.55 g/t gold and 0.21% copper, the average copper and gold recoveries to the concentrate are projected to be 81.6% and 55.3%, respectively. As projected from the testwork, the cyanidation circuit (carbon-in-leach, or “CIL”) will increase the overall gold recovery to a range of 60% to 79%, depending on gold and copper head grades. Silver recovery from the flotation and leaching circuits is expected to be 62.7% on average. A separate flotation circuit will recover molybdenite from the copper-gold-molybdenum bulk concentrate when higher-grade molybdenite mineralization is processed.

The proposed process plant (the “Process Plant”) will consist of three separate facilities: ore primary crushing and handling facilities at the mine site, a 23 km ore transportation tunnel system between the mine site and the processing facility, and a main process facility at the Treaty ore processing complex (“OPC”), adjacent to the TMF.

Gyratory crushers in the comminution plants located at the mine site will reduce the mill feed from 80% passing 1,200 mm to 80% passing 150 mm. The crushed ore will be conveyed to a 30,000 t surge bin (two pockets, each 15,000 t) located underground at a train car loading area, prior to being transported by train cars to the Treaty OPC.

A 23 km Mitchell-Treaty Tunnels (“MTT”) system has been designed to connect the Mine Site and the PTMA. The crushed ore will be transported through the tunnels by train. This tunnel will also be used for electrical power transmission sourced from the Northwest Transmission Line and for the transport of personnel and supplies for mine operating and water management activities. The proposed tunnel route is through Crown land and approximately 13 kilometers of its length passes through ground subject to mineral claims held by third parties.

The Process Plant at the Treaty OPC will consist of secondary and tertiary crushing, primary grinding, flotation, concentrate regrinding, concentrate dewatering, cyanide leaching, gold recovery, tailing delivery, and concentrate loadout systems. The crushed ore transported from the mine site will be sent to a 60,000 t coarse ore stockpile adjacent to the tunnel portal. The ore will then be reclaimed and crushed by cone crushers, followed by an HPGR comminution circuit. There is a 30,000 t fine ore stockpile located ahead of the tertiary crushing circuit. The crushing systems will be operated in closed circuits with screens.

The ore from the HPGR comminution circuits will be ground to a product size of 80% passing 150 μm by four conventional ball mills in closed circuit with hydrocyclones. The ground ore will then have copper/gold/molybdenum minerals concentrated by conventional flotation to produce a copper-gold-molybdenum concentrate and gold bearing pyrite products for gold leaching. Depending on molybdenum content in the copper-gold-molybdenum concentrate, the concentrate may be further treated to produce a copper-gold concentrate and a molybdenum concentrate. The molybdenum concentrate will be leached to reduce levels of copper and other impurities. The concentrates will be dewatered and shipped to copper and molybdenum smelters.

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The gold-bearing pyrite products which consist of the bulk cleaner flotation tailing from the copper-gold- molybdenum cleaner flotation circuit and the gold-bearing pyrite concentrate will be leached with cyanide using CIL treatment for additional gold and silver recovery. Prior to storage in the lined pond within the TMF, the leach residues from the cyanide leaching circuits will be washed, and subjected to cyanide recovery and destruction. The water from the residue storage pond will be recycled back to the cyanide leach circuit. Any excessive water will be further treated prior to being sent to the flotation tailing storage pond.

The flotation tailing and the washed leach residues would be sent to the TMF for storage in separate tailing areas. Two water reclaim systems for the flotation tailing pond and the CIL residue pond have been designed to separately reclaim the water from the TMF.

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Each of the cells are expected to have surplus water. Surplus water is proposed to be managed during operations using a combination of storage, discharge to Treaty Creek during freshet if water quality meets standards, or treatment at the Treaty process plant water treatment facility (if required) and discharge.

Mine Site Water Management

The overall site water management strategy, including the discharge from the Water Storage Facility (“WSF”) via the High-density Sludge (“HDS”) water treatment plant (“WTP”) was the strategy that was reviewed and approved during the EA Application and EIS review process.

Three diversion tunnel routes totalling approximately 22.4 km will be required to route glacial melt water and non-contact valley runoff from the Mitchell and McTagg valleys around the mine area. The open pit phase of the Mitchell Diversion Tunnel (“MDT”) and the twinned McTagg Diversion Tunnels (“MTDTs”) are sized to convey flows from an average 200-year storm. When the Mitchell block cave operation commences, an additional MDT paralleling the open pit phase tunnel will be driven to protect the underground workings, which are more sensitive to inflows than the open pits.

The second tunnel of each set of twinned tunnels provides redundancy against blockage as each individual tunnel can carry typical freshet flows. The provision of twin tunnels also allows switching base flows between adjacent tunnels if access for maintenance is required.

The MDT will route water from Mitchell Creek/Mitchell Glacier to the Sulphurets Valley, away from the open pit, primary crushing facility, open pit area, and Mitchell rock storage facility. The MDT would collect melt water from beneath the base and toe of the Mitchell Glacier via separate surface and sub-glacial inlet structures, which improves redundancy. Both surface and subglacial inlets are designed to protect the inlet of the diversion from being blocked by snow avalanches. The MDT is proposed to generate hydroelectric power as Sulphurets Valley is lower than Mitchell Valley. In Year 23, the MDT will be augmented with a second (twin) tunnel to provide protection against the 1,000-year storm flow to the underground workings.

The McTagg valley tunnels collect flows from east and west McTagg valleys and feed into the main diversion tunnel route, around the west side of the McTagg rock storage facility (“RSF”), and discharge into Sulphurets Valley. These tunnels would have three staged inlets as the McTagg RSF raises in elevation. Hydropower is proposed to be generated by the McTagg tunnels only in Stages 2 and 3.

To facilitate construction in the Mitchell Valley and the staging of water management as the Mitchell and McTagg RSFs rise and fill the valley areas, an approximately 5.4 km long Mitchell Valley Drainage Tunnel will be constructed under Mitchell Valley to carry the existing flows from Mitchell Creek, which are naturally affected by contact with surface mineralization. When the mine is in operation the tunnel will convey contact water from the Mitchell workings and the mineralized area upstream of the deposit, around the RSFs into the WSF.

An in-rock spillway would be constructed at the southwest corner of the McTagg RSF to convey surface diversion flows down to diversion pipelines and channels on the west and east sides of the WSF pond.

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Contact water from the mine areas (open pits, RSFs, roads, infrastructure) would be directed to the WSF, located in the lower Mitchell Creek area. The WSF would be formed with a 165 m-high rock fill asphalt core dam built to full height by Year -1. The WSF dam is founded on competent sedimentary rock foundations. Seepage will be controlled by the asphalt core in the dam and the dam foundation will be grouted. A seepage collection pond will return seepage water to the WSF.

During operations, secondary diversion ditches and pipelines would be implemented within the mine area to reduce contact water volumes. Open pit contact water and discharge from pit dewatering wells would be routed from the pit rims, via ditches or direct drainage, and via pipelines or tunnels to the WSF.

Mine area contact water is to be treated with a high density sludge lime WTP.

Additional hydropower is to be generated in an energy recovery facility from the flow of treatment water from the WSF to the WTP.

Permitting

As of June 2016, the KSM Project has successfully gone through the provincial and federal environmental assessment processes, and the appropriate certificates/approvals have been obtained. Additionally, permits for early stage constructions activities for the first two and half years of site activity were obtained. These permits covered the following mine components:

Seabridge is currently in the process of obtaining numerous provincial and federal permits to allow for the construction of parts of the KSM Project, as well as expanding exploration activities, including but not limited to the following:

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Mine Planning (2016 PFS Plan)

The proposed mine uses conventional large-scale open pit and block cave underground mining methods. Pit phases at the Mitchell, Kerr, and Sulphurets deposits have been engineered based on the results of an updated economic pit limit analysis. Starter pits have been selected in higher-grade areas. Underground mining has been proposed for the Iron Cap deposit and below the Mitchell open pit to reduce the volume of waste generated from the potential open pits.

Mining Limits

Lerchs-Grossman (“LG”) pit shell optimizations were used to define open pit mine plans in the 2012 KSM PFS Report and the same limits were confirmed using LG for the Current KSM Report. Ultimate open pits have been modified slightly to implement design changes from the EA Application and EIS process and updated geotechnical study.

The underground block caving mine designs for both the Mitchell and Iron Cap deposits are based on modeling using GEOVIA’s PCBC™ and Footprint Finder software. The ramp-up and maximum yearly mine production rates were established based on the rate at which the drawpoints are constructed, and the initial and maximum production rates at which individual drawpoints can be mucked. The values chosen for these inputs were based on industry averages adjusted to suit the anticipated conditions.

Mineral Reserve Estimate

Waste to ore open pit cut-offs and underground shut-offs, including process recovery, were determined using metal prices of US$1,200.00/oz of gold, US$2.70/lb of copper, US$17.50/oz of silver, and US$9.70/lb of molybdenum for NSR calculations.

Open pit mineral reserves have been calculated using the updated pit designs and the 2016 mineral resource models. These calculations include mining loss and dilution that varies by pit ranging from 2.2 to 5.3% for loss, and 0.8 to 3.9% for dilution. A dynamic cut-off grade strategy has been applied with a minimum NSR of CDN$9.00/t.

The mining NSR shut-off is Cdn$15.00/t for the Mitchell underground mine and CDN$16.00/t for the Iron Cap underground mine. The Mitchell mineral reserves include 59 Mt of non-mineralized dilution at zero grade (13%) and 7 Mt of mineralized dilution (2%). The Iron Cap mineral reserves include 20 Mt of dilution at zero grade (9%) and 25 Mt of mineralized dilution (11%).

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Proven and probable mineral reserves for the KSM Project as of July 31, 2016 are estimated as:

KSM proven and probable mineral reserves as of July 31, 2016

Note: The mineral reserves tabulated above are included in the tabulated mineral resources. All mineral reserves stated above account for mining loss dilution.

Mineral reserves are derived from a total undiluted measured plus indicated mineral resource of 49.8 million ounces of gold and 13.6 billion pounds of copper contained in 2.9 billion tonnes at an average grade of 0.54 grams of gold per tonne and 0.21% copper per tonne. Mineral resources which are not mineral reserves do not have demonstrated economic viability. Most of the Deep Kerr and Lower Iron Cap mineral resources are classified as inferred mineral resources and are excluded from the reserves.

Mine Production Plan (2016 PFS Plan)

During the initial 33 years of mine life, the majority of ore is derived from open pits, with the tail end of this period supplemented by the initial development of underground block cave mines. After Year 1 ramp up, ore delivery to the mill during Year 2 to Year 35 is designed to be maintained at an average of 130,000 t/d. After depletion of the open pits, the mill processing rate will be reduced to about 96,000 t/d for 10 additional years, before ramping down to just over 61,000 t/d. The change in throughput matches the production levels from the block cave with appropriate ramp ups and ramp downs applied. The remaining few years use stockpile reclaim to supplement the declining production from the block caves at the end of the mine life.

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Ore is mined from Mitchell open pit from Years 1 to 24. Mitchell transitions to block cave mining as the Mitchell pit is mined out. Ore is mined from Sulphurets open pit from Years 1 to 17. Kerr open pit supplements block cave mining from Year 25 to Year 34, and during these years, ore will be transported by an overland conveyor and rope conveyor system starting at the Kerr pit. Mitchell block cave is estimated to have a production ramp-up period of six years, steady state production at 20 Mt/a for 17 years, and then ramp-down production for another 7 years. Iron Cap is estimated to have a production ramp-up period of four years, steady state production at 15 Mt/a for 10 years, and then ramp-down production for another 9 years. The underground pre-production period would be six years, with first underground ore production from Mitchell and Iron Cap in Years 23 and 32, respectively.

All ore will be transported by train from the mine area through the MTT to the Treaty processing plant. The ore transport system will also include:

Infrastructure (2016 PFS Plan)

In Figure 2 below, the location of the proposed infrastructure is shown. Site access will be established from three fronts:

Copper concentrates produced at the Treaty plant will be transported by contract trucking firms via Highway 37 and 37A to one of the port vendors in Stewart, BC. A concentrate storage building (approximately 100 m by 66 m) will be required. Copper concentrates will be loaded via ship loader and shipped via ocean transport to overseas smelters.

Multiple staging areas will be used in the KSM Project, with the majority of equipment and materials anticipated to be delivered to the Port of Stewart, supplemented by overland freight delivered to Terrace or Stewart.

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Figure 2 – KSM Project Layout

Trains will travel through the MTT on a conventional ballasted track structure, be electrically driven by an overhead catenary system, and be controlled by an automated train control system managed from a remote control room without an on-board operator. The trains will transport personnel, freight and fuel and the train staging areas will be accessible by road.

The tunnels will be driven in accordance with the BC Mines Act and Regulations using mechanized drill and blast techniques and will follow the conditions contained within the License of Occupation. The MTT are on the critical path of the construction schedule and have therefore been broken into two segments to allow for concurrent development workplaces resulting in a shorter total tunnel construction period. This will be accomplished with headings at the Treaty Valley, an adit as the saddle of a transecting valley, located 6.1 km from the Treaty portals, and by headings in the Mitchell Valley thus creating six active headings. During construction, rail will be installed in both the North and South tunnels for the future operations rail haulage system; however, only the North Tunnel will be used for hauling tunnel muck during construction.

Electric service for the KSM Project will be from BC Hydro’s Northern Transmission Line (“NTL”) that was completed in 2014 and parallels Highway 37. The NTL provides an economic and reliable source of power at an estimated cost of C$0.062/kWh or US$0.050/kWh.

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The new 344 km long, 287 kV, NTL runs from the Skeena Substation on the BC Hydro 500 kV grid near Terrace, BC, to Cranberry Junction, from which point it roughly parallels BC Highway 37 to its terminus at Bob Quinn. A 30 km long, 287 kV transmission extension from the NTL will be constructed, originating at the Treaty Creek Switching Station (BC Hydro designation TCT) and terminating at the Treaty processing plant. This spur line will parallel the Treaty Creek access road in a common corridor. Land tenure for the right-of-way has been obtained. The Treaty Creek Switching Station on the NTL will be approximately 18 km south of Bell II. The KSM Project will take electrical service from the new NTL as a Transmission Service Customer under Schedule 1823 as published in the BC Hydro tariffs.

Seabridge commissioned BC Hydro to carry out a Facilities Study for the KSM Project, following the previously completed BC Hydro System Impact Study. The Facilities Study is the final evaluation required by the utility to define connection costs and terms of electric service. A draft version of the Facilities Study has been issued. Upon the final issue of the study, the parties will be in a position to sign a Facilities Agreement that, in conjunction with the Electricity Supply Agreement (ESA), forms the standard contract for the supply of electric power for a large bulk Transmission Service Customer such as Seabridge. The KSM Project, on the basis of the current application, has priority for service from the new NTL. Currently there is a reservation of 150 megavolt-ampere (“MVA”) for the KSM Project, but an application has been made to increase this to 200 MVA.

Several energy recovery and mini-hydro plants have been included in the KSM Project development plan. These plants generate electric power by making use of facilities already included in the KSM Project and will result in significant net project energy savings.

It was assumed for the Current KSM Report that the KSM Project will be constructed using the engineering, procurement, and construction management (“EPCM”) approach with a management team located at both the Mine Site and the Treaty OPC. The Owner will supply all the temporary construction camps and service contractors to manage daily activities on site.

Mine Site construction begins with the development of the site access roads to the water treatment plant area, WSF, tunnel entrances, Coulter Creek access road, and building locations. Early works material and equipment will be mobilized via the Winter Access Road and the pioneering road along the Coulter Creek access road alignment. Major equipment, general construction materials, and heavy earth moving equipment will be mobilized via the Coulter Creek access road. Construction material and equipment for the plant and tailings management area will be transported using the Treaty Creek access road. Helicopter support is planned to be used prior to Treaty Creek access road pioneering road completion. The construction schedule for both sites is coordinated around the development of the MTT.

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Capital Cost Estimate (2016 PFS Plan)

An initial capital cost of US$5.005 billion is estimated for the project. Costs in the Current KSM Report are expressed in US Dollars, unless otherwise stated. Costs have been converted using a fixed currency exchange rate of US$0.80 to CDN$1.00. The expected accuracy range of the capital cost estimate is +25%, -10%. This estimate includes only initial capital, defined as all capital expenditures required to produce concentrate and doré. A summary of the major capital costs is shown in the following table.

This 2016 PFS estimate is prepared with a base date of Q2 2016. The estimate does not include any escalation past this date. Budget quotations were obtained for major equipment. The vendors provided equipment prices, delivery lead times, freight costs to a designated marshalling yard, and spares allowances. The quotations used in this estimate were obtained in Q1/Q2 2016, and are budgetary and non-binding. Pricing for all major equipment is based on budgetary quotations provided by vendors obtained in Q1/Q2 2016. For non-major equipment, pricing is based on in-house data or recent quotes from similar projects.

All equipment and material costs are based on FCA (Free Carrier) Ex-works (Incoterms 2010). Other costs such as spares, taxes, duties, freight, and packaging are covered separately in the indirect costs section of the capital cost estimate.

Sustaining capital costs were also estimated leveraging the same basis of information applied to the initial capital estimate with respect to vendor quotations, labour, and material costs. The sustaining capital costs total US$5.503 billion and consist of:

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Operating Cost Estimate (2016 PFS Plan)

The average operating cost for the KSM Project is estimated at US$12.03/t milled at the nominal process rate of 130,000 t/d or US$12.33/t for the LOM average as shown in the table below. The cost estimates in this table are based upon budget prices in Q1/Q2 2016 or based on the data from the database of the consulting firms involved in the cost estimates. When required, costs in this report have been converted using a three-year average currency exchange rate of CDN$1.00 to US$0.80. The expected accuracy range of the operating cost estimate is +25%/-10%.

The estimates do not include energy recovery credit (approximately US$0.12/t milled LOM) from mini hydropower stations and the cost (approximately US$0.15/t milled LOM) related to Provincial Sales Tax (PST).

Notes: * - The estimates, excluding mining operating costs, are based on a mill feed rate of 130,000 t/d; the costs do not reflect higher unit costs late in mine life when the mill feed rates are lower.

** - Mining operating costs are LOM average unit costs calculated by total LOM operating costs divided by LOM process tonnages; mining operating costs exclude mine pre-production costs. The annual cost is the LOM average cost.

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Power will be supplied by BC Hydro at an average cost of C$0.062/kWh or US$0.050/kWh at the plant 25 kV bus bars, based on the BC Hydro credits for energy conservation by use of HPGR and similar, and the cost of “peaking” power to avoid a BC Hydro contract demand of over 150 MVA. Process power consumption estimates are based on the Bond work index equation for specific grinding energy consumption and estimated equipment load power draws for the rest of the process equipment. The power cost for the mining section is included in the mining operating costs. Power costs for site services, water treatment plants, TMF seepage water pumping, and the Mine Site water pumping are included in their area costs separately.

The estimated electrical power costs are based on the 2016 BC Hydro Tariff 1823 – Transmission Service Stepped Rate and Schedule 1901 – Deferred Account Rate Rider. The electrical power costs also account for local system losses and include 7% PST, which is not treated as an Input Tax Credit (“ITC”). The rates take advantage of the implementation of BC Hydro-approved energy conservation measures in the plant design phase, including the HPGR circuit, which will greatly reduce the costlier Tier 2 power in the BC Hydro stepped-rate Schedule 1823. The 5% Goods and Services Tax (GST) is not included in the power rates as it is an ITC.

The operating costs are defined as the direct operating costs including mining, processing, tailing storage, water treatment, and G&A. The hydropower credit from recovered hydro-energy during mining operations is not accounted for directly against operating cost estimate, but is included in the economic financial analysis. Sustaining capital costs including all capital expenditures after the process plant has first been put into production are excluded from the operating cost estimate.

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Economic Evaluation (2016 PFS Plan)

The economic evaluation was prepared on both a pre-tax financial and a post-tax financial model.

Metal revenues projected in the KSM Project cash flow models were based on the average metal production values as follows:

A cash flow analysis was prepared using four metals price scenarios. In the base case scenario, the three- year trailing average (as of July 31, 2016) prices for gold, copper, silver and molybdenum were used, consistent with industry standard and in compliance with the guidance of the United States Securities and Exchange Commission and NI 43-101. In addition to the base case, three metal price/exchange rate scenarios were also developed: the first uses the metal prices and exchange rate used in mine optimization and design (2016 Design Case); the second uses the spot metal prices and closing exchange rate on July 1, 2016 (Recent Spot Price Case); the third uses higher metal prices to indicate upside potential (Alternate Case). The input parameters and results of all four scenarios on a pre- and post-tax basis can be found in the following table.

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