SUPPLEMENTAL INDENTURE

Exhibit 4.2(f)

SUPPLEMENTAL INDENTURE

SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”), dated as of September 16, 2019 among Hecla Quebec Inc., a company organized under the laws of British Columbia (the “Guaranteeing Subsidiary”), which is a direct subsidiary of Hecla Mining Company (or its permitted successor), a Delaware corporation (the “Company”), the Company, the other Guarantors (as defined in the Indenture referred to herein) and The Bank of New York Mellon Trust Company, N.A., as trustee under the Indenture referred to below (the “Trustee”).

W I T N E S S E T H

WHEREAS, the Company has heretofore executed and delivered to the Trustee an indenture, dated as of April 12, 2013 (the “Indenture”), providing for the issuance of the Company’s 6.875% Senior Notes due 2021 (the “Notes”);

WHEREAS, the Indenture provides that under certain circumstances each Guaranteeing Subsidiary shall execute and deliver to the Trustee a supplemental indenture pursuant to which such Guaranteeing Subsidiary shall unconditionally guarantee all of the Company’s Obligations under the Notes and the Indenture on the terms and conditions set forth herein (the “Note Guarantee”); and

WHEREAS, pursuant to Section 9.01 of the Indenture, the Trustee is authorized to execute and deliver this Supplemental Indenture.

NOW, THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, the Guaranteeing Subsidiary and the Trustee mutually covenant and agree for the equal and ratable benefit of the Holders of the Notes as follows:

1.     CAPITALIZED TERMS. Capitalized terms used herein without definition shall have the meanings assigned to them in the Indenture.

2.     AGREEMENT TO GUARANTEE. The Guaranteeing Subsidiary hereby agrees to provide an unconditional Guarantee on the terms and subject to the conditions set forth in the Note Guarantee and in the Indenture including but not limited to Article 10 thereof.

3.     NO RECOURSE AGAINST OTHERS. No director, officer, employee, incorporator or stockholder of the Company or any Guarantor, as such, will have any liability for any obligations of the Company or the Guarantors under the Notes, this Indenture, the Note Guarantees or for any claim based on, in respect of, or by reason of, such obligations or their creation. Each Holder of Notes by accepting a Note waives and releases all such liability. The waiver and release are part of the consideration for issuance of the Notes. The waiver may not be effective to waive liabilities under the federal securities laws.

4.     NEW YORK LAW TO GOVERN. THE INTERNAL LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO CONSTRUE THIS SUPPLEMENTAL INDENTURE WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY.

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5.     COUNTERPARTS. The parties may sign any number of copies of this Supplemental Indenture. Each signed copy shall be an original, but all of them together represent the same agreement.

6.     EFFECT OF HEADINGS. The Section headings herein are for convenience only and shall not affect the construction hereof.

7.     THE TRUSTEE. The Trustee shall not be responsible in any manner whatsoever for or in respect of the validity or sufficiency of this Supplemental Indenture or for or in respect of the recitals contained herein, all of which recitals are made solely by the Guaranteeing Subsidiary and the Company.

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IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture to be duly executed and attested, all as of the date first above written.

Dated: September 16, 2019

GUARANTEEING SUBSIDIARY:

HECLA QUEBEC Inc.

By:

Name:  Xxxxxx X. Xxxxxxx

Title:    President

COMPANY:

HECLA MINING COMPANY

By:

Name:  Xxxxx X. Xxxxxx

Title:    Vice President

[Signature Page to Supplemental Indenture]

GUARANTORS:

HECLA LIMITED

By:

Name:  Xxxxxx X. Xxxxxxx

Title:    Vice President

HECLA ADMIRALTY COMPANY

By:

Name:  Xxxxxx X. Xxxxxxx

Title:    Vice President

HECLA SILVER VALLEY, INC.

By:

Name:  Xxxxxxxx X. Xxxxxxx

Title:    Vice President

HECLA MC SUBSIDIARY, LLC

By:

Name:  Xxxxxx X. Xxxxxx

Title:    President

RIO GRANDE SILVER, INC.

By:

Name:  Xxxxxxxx X. Xxxxxxx

Title:    Vice President

SILVER HUNTER MINING COMPANY

By:

Name:  Xxxxxxxx X. Xxxxxxx

Title:    Vice President

[Signature Page to Supplemental Indenture]

HECLA ALASKA LLC

By:

Name:  Xxxxxx X. Xxxxxxx

Title:    Senior Vice President - Operations

             of Hecla Mining Company,

             It’s Member

HECLA GREENS CREEK MINING COMPANY

By:

Name:  Xxxxxx X. Xxxxxxx

Title:    Vice President

HECLA JUNEAU MINING COMPANY

By:

Name:  Xxxxxx X. Xxxxxxx

Title:    Vice President

XXXXX TRADING INC.

By:

Name:  Xxxxxxxx X. Xxxxxxx

Title:    Vice President

HECLA MONTANA, INC.

By:

Name:  Xxxxxx X. Xxxxxxx

Title:    President

REVETT SILVER COMPANY

By:

Name:  Xxxxxx X. Xxxxxxx

Title:    President & CEO

[Signature Page to Supplemental Indenture]

XXXX MINE INC.

By:

Name: Xxxxxx X. Xxxxxxx

Title: President

RC RESOURCES, INC.

By:

Name: Xxxxxx X. Xxxxxxx

Title: President

REVETT EXPLORATION, INC.

By:

Name: Xxxxxx X. Xxxxxxx

Title: President

REVETT HOLDINGS, INC.

By:

Name: Xxxxxx X. Xxxxxxx

Title: President

MINES MANAGEMENT, INC.

By:

Name: Xxxxxxx X. Xxxxxx

Title: Vice President

NEWHI, INC.

By:

Name: Xxxxxxx X. Xxxxxx

Title: Vice President

[Signature Page to Supplemental Indenture]
      

MONTANORE MINERALS CORP.

By:

Name:  Xxxxxxx X. Xxxxxx

Title:    Vice President

klondex gold & silver mining coMPANY

By:

Name:  Xxxxxx X. Xxxxxxx

Title:    President

klondex midas holdings limited

By:

Name:  Xxxxxx X. Xxxxxxx

Title:    President

klondex midas operations inc.

By:

Name:  Xxxxxx X. Xxxxxxx

Title:    President

klondex aurora mine inc.

By:

Name:  Xxxxxx X. Xxxxxxx

Title:    President

klondex hollister mine inc.

By:

Name:  Xxxxxx X. Xxxxxxx

Title:    President

[Signature Page to Supplemental Indenture]

THE BANK OF NEW YORK MELLON

TRUST COMPANY, N.A.,

as Trustee

By:

Name:

Title:

[Signature Page to Supplemental Indenture]