Exhibit 23.13(d)



Tetra Tech Canada Inc.



March 29, 2017



|TO: |  | Seabridge Gold Inc.
                                                                                United States Securities and Exchange Commission
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|Re: |  | Seabridge Gold Inc. (the "Company")
                                                                                Consent of Expert
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Ladies and Gentlemen:



Reference is made to the following reports:



|· |  | Courageous Lake Prefeasibility Study dated September 5, 2012 and amended November
11, 2014(the "Report")
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|· |  | 2016 KSM (Kerr-Sulphurets-Mitchell) Prefeasibility Study Update and Preliminary Economic
Assessment dated October 6, 2016 (the “Report”)
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In connection with the Company’s
Annual Report on Form 40-F (the “40-F”), to be filed with the U.S. Securities and Exchange Commission (“SEC”)
pursuant to the Securities Exchange Act of 1934, as amended, I, Kevin Jones, P.Eng., on behalf of myself and Tetra Tech Canada
Inc., hereby:



|1. |  | consent to the public filing of the Report and the use of any extracts from or a summary
of the Reports in the 40-F;
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|2. |  | consent to the use of my name and Tetra Tech Canada Inc.’s name and references
to the Report, or portions thereof, in the 40-F and to the inclusion or incorporation by reference of information derived from
the Report in the 40-F;
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|3. |  | confirm that I have read the 40-F and that it fairly and accurately represents the
information in the sections of the Reports for which I am responsible; and
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|4. |  | confirm that I have read the 40-F and have no reason to believe that there are any
misrepresentations in the information contained therein that are derived from the Report or that are within my knowledge as a
result of the services performed by me in connection with the Reports
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| |  | Yours truly,       
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| |  |                    
| |  | /s/ Kevin Jones    
| |  | Kevin Jones, P.Eng.