HECLA MINING COMPANY RETIREMENT PLAN

(Effective as of January 1, 2025)

TABLE OF CONTENTS

HECLA MINING COMPANY RETIREMENT PLAN

(As Amended and Restated January 1, 2025)

INTRODUCTION

This document is an amendment and restatement of the Hecla Mining Company Retirement Plan (the “Plan”). The Plan was originally established effective January 1, 1947 by Hecla Mining Company (the “Company”).

Effective April 16, 2008, Hecla Admiralty Company, a wholly owned subsidiary of the Company, acquired all of the outstanding shares of capital stock of both the Kennecott Greens Creek Mining Company and the Kennecott Juneau Mining Company (collectively “Greens Creek”), the employees of which (the “Greens Creek Employees”) participated in the Rio Tinto America, Inc. Investment Partnership Plan or the Rio Tinto America, Inc. Retirement Plan. In connection with the transaction, the Company amended the Plan to (1) add a cash balance feature to provide a benefit to Greens Creek Employees who participated in the Rio Tinto America, Inc. Investment Partnership Plan and (2) add a supplemental pension benefit for Greens Creek Employees that previously participated in the Rio Tinto America, Inc. Retirement Plan. No assets from the Rio Tinto America, Inc. Investment Partnership Plan or the Rio Tinto America, Inc. Retirement Plan were transferred to the Plan and this Plan is not a successor to or continuation of such plans.

Effective July 19, 2024, no employee hired, rehired or transferred from an ineligible position to an eligible employee position may (1) become a new participant in the Plan, (2) reenter the Plan as an active participant or otherwise again be considered an active participant, or (3) otherwise commence or recommence active participation in or benefit accrual under the Plan. Thus, on and after July 19, 2024, the only employees who shall actively participate in this Plan and accrue additional benefits shall be those individuals who were employed in an eligible employee position on July 18, 2024 and who otherwise meet the requirements to be a participant and actively participate in this Plan. For avoidance of doubt, a transfer from one eligible employee position to another eligible employee position shall continue to actively participate in this Plan.

This restatement is being made to incorporate all prior amendments to the Plan and make certain other discretionary changes. This restatement is effective, except as otherwise stated, as of January 1, 2025.

The Plan is intended to be qualified under Section 401(a) of the Internal Revenue Code, as amended (the “Code”), with a trust exempt from tax under Code Section 501(a), and is intended to comply with the Employee Retirement Income Security Act of 1974, as amended (“ERISA”). The Plan shall be interpreted and administered in accordance with these intents.

Article I

DEFINITIONS

“Accrued Benefit” means:

A Participant’s Accrued Benefit shall be adjusted, as described in the Plan, to reflect early or deferred commencement and/or payment in an optional form.

“Actuarial Equivalent” means a benefit or an amount that is equal in value to another benefit or amount, determined at the time benefit payments commence, based on the following assumptions and factors:

“Administrator” means the Committee as specified in ARTICLE XIII.

“Annuity Starting Date” means the first day of the first period for which payment of an Accrued Benefit under the Plan is scheduled to commence, either as a result of a written election or by operation of the Plan. Generally, a Participant’s Annuity Starting Date shall be as soon as practicable after the Participant has submitted the requisite distribution forms. An amount is payable as an annuity or, in the case of a benefit not payable in the form of an annuity, the first day on which all events have occurred which entitled the Participant to such benefit. The payment of any disability retirement benefit is to be disregarded in determining the Annuity Starting Date.

“Average Compensation” means effective July 19, 2024:

the period of service over which Compensation shall be considered when determining a Participant’s Average Compensation shall begin with their Employment Commencement Date and end on their Termination of Employment. The period of service over which Compensation shall be considered shall include an Industrial Injury Absence if following the Industrial Injury Absence the Participant returns to active employment with the Company for a period of at least six consecutive months; provided that, solely for the purpose of computing benefits, the period of Industrial Injury Absence shall be credited with base salary or wages as of the date the absence began to the extent that would have been received if the Employee had not been injured. Notwithstanding any provision of the Plan to the contrary, for an Employee hired, rehired, or transferred from an ineligible position to an Eligible Employee position on or after July 19, 2024, the period of service over which Compensation is considered shall not consider service or Compensation on or after the date of such hire, rehire or transfer.

“Beneficiary” means the Participant’s Spouse or, in the case of an unmarried Cash Balance Participant, the person or persons designated by the Participant to receive their Cash Balance Account after the death of the Participant. If upon the death of an unmarried Cash Balance Participant there is no valid designation of Beneficiary on file with the Employer, the following shall be deemed to be the Participant’s Beneficiary or Beneficiaries, in order of priority: surviving children, including adopted children, in equal shares; surviving parents, in equal shares; and the Participant’s estate. The determination of the Committee as to which persons, if any, qualify within the categories listed above shall be final and conclusive upon all persons.

“Cash Balance Account” means the nominal bookkeeping account established and maintained pursuant to Section 3.2.

“Cash Balance Participant” means:

A Participant who was a Cash Balance Participant under subsection (a) or (b) above when they first became a Participant shall continue to be a Cash Balance Participant notwithstanding a transfer to another Controlled Group Member or a rehire following a Termination of Employment so long as they are an Eligible Employee, provided that no Employee transferred from an ineligible position to an Eligible Employee position or rehired on or after July 19, 2024, may reenter the Plan as an active participant or otherwise recommence active participation in or benefit accrual under the Plan.

“Code” means the Internal Revenue Code of 1986, as amended from time to time.

“Committee” means the retirement committee appointed and acting in accordance with ARTICLE XIII of this Plan.

“Company” means Hecla Mining Company, a Delaware corporation.

“Compensation” means:

“Controlled Group” means the Company and:

“Covered Compensation” means for any Plan Year, the average (without indexing) of the Social Security Taxable Wage Base in effect for each calendar year during the thirty-five (35) year period ending with the last day of the calendar year in which the Participant attains (or will attain) Social Security Retirement Age. No change in Covered Compensation shall decrease a Participant’s Accrued Benefit under the Plan. In determining a Participant’s Covered Compensation for a Plan Year, the Social Security Taxable Wage Base for the current Plan Year and any subsequent Plan Year shall be assumed to be the same as in effect for the Plan Year for which the determination is being made. A Participant’s Covered Compensation for any Plan Year after the thirty-five (35) year period is the Participant’s Covered Compensation for the Plan Year in which the Participant

attained Social Security Retirement Age. A Participant’s Covered Compensation for a Plan Year before the thirty-five (35) year period is the Social Security Taxable Wage Base in effect as of the beginning of the Plan Year. A Participant’s Covered Compensation shall be automatically adjusted for each Plan Year in accordance with these rules.

“Credited Service”

“Early Retirement” shall mean retirement on or after a Participant attains Early Retirement Age.

“Early Retirement Age” means the attainment of age 55 and completion of ten (10) Years of Service.

“Early Retirement Benefit” means a benefit payable before Normal Retirement Age in accordance with ARTICLE IV of this Plan.

“Early Retirement Date” means the first day of the month (prior to the Normal Retirement Date) coinciding with or following Participant’s Termination of Employment and after attainment of Early Retirement Age.

“Early Retirement Window Additional Benefit” means a supplemental benefit provided to certain Participants who elected to retire between December 1, 2001, and December 31, 2001, the terms of which are governed by the Plan document in effect at that time.

“Effective Date” means January 1, 2025, except where a provision is specifically effective as of another date.

“Election Period” means the 180-day period ending on the Participant’s Annuity Starting Date.

“Eligible Employee” means any Employee who is regularly employed by an Employer and who is classified as such on the payroll records of an Employer (regardless of any reclassification which may be made by any government agency or court). An Eligible Employee does not include any individual who is (a) a nonresident alien with no U.S. source income, (b) a Leased Employee, or (c) a member of a collective bargaining unit of employees.

“Eligible Spouse” means the Spouse to whom a Participant is married during the 12-month period ending on either the Annuity Starting Date or the date of their death whichever occurs earlier.

“Employee” means a person who is a common law employee of an Employer or is a Leased Employee.

“Employer” means the Company and any Controlled Group Member, including Hecla Greens Creek Mining Company, Hecla Juneau Mining Company, Hecla Limited, and Troy Mine Inc, who has adopted the Plan. For purposes of determining an Employee’s Hour of Service, the term Employer includes any Controlled Group Member.

“Employment Commencement Date” means the date that the Employee first performs an Hour of Service for the Employer.

“Entry Date” means the first day of each calendar quarter.

“ERISA” means the Employee Retirement Income Security Act of 1974, as amended.

“Greens Creek” means Kennecott Greens Creeks Mining Company, Kennecott Juneau Mining Company, Hecla Juneau Mining Company, and Hecla Greens Creek Mining Company.

“Greens Creek Employee” means an Employee of Greens Creek.

“Highly Compensated Employee” with respect to a Plan Year means either of the following:

The identification of Highly Compensated Employees shall be made in accordance with the provisions of Code Section 414(q).

“Hour of Service” means:

“Industrial Injury Absence” means a temporary absence due to injuries arising out of and in the course of the Company’s employ. The Industrial Injury Absence shall cease when the employee is physically capable of returning to work for the Company. Only injuries causing an absence exceeding sixty days or more shall be recognized under the provisions of this Paragraph.

“Interest Credit” means a credit applied to Cash Balance Accounts on the last day of each calendar quarter pursuant to Section 3.2.

“Joint and Survivor Annuity” means an annuity providing actuarially reduced (from the Single Life Annuity) monthly benefits for the life of the Participant and the Participant’s Spouse, if any. A 50%, 75% or 100% Joint and Survivor Annuity provides a monthly pension payable to the Participant’s Spouse following the Participant’s death equal to 50%, 75% or 100% respectively of the monthly pension payable to the Participant. All Joint and Survivor Annuities shall be Actuarially Equivalent to the Single Life Annuity.

“Leased Employee” means any individual who is not an Employee of the Employer or a Controlled Group Member but who performs services for the Employer or a Controlled Group Member, where:

“Military Service” means qualified military service within the meaning of Code Section 414(u).

“Normal Form” means the normal form of benefit as prescribed by Section 7.1.

“Normal Retirement” means retirement from service with the Employer on or after the Participant’s Normal Retirement Age. In the case of a Participant who continues in the employ of the Employer after reaching such Normal Retirement Age, ‘Normal Retirement’ shall mean retirement on the delayed retirement date, which is the date of the Participant’s actual Termination of Employment. When such Participant actually retires, they shall then be entitled to a delayed retirement benefit in accordance with Section 3.5.

“Normal Retirement Age” shall mean the date the Participant attains age 65.

“Normal Retirement Date” means the first day of the month coinciding with or next following a Participant’s attainment of Normal Retirement Age.

“One-Year Break in Service” means, with respect to any Employee, a Plan Year during which the Employee is credited with 500 or fewer Hours of Service. Solely for purposes of determining whether an Employee has incurred a One-Year Break in Service, an Employee who is absent from active service on account of a Parental Leave (whether paid or unpaid) shall be credited with Hours of Service during the absence period on the basis of eight hours per day during the Parental Leave. With respect to a Parental Leave, the Administrator shall credit only the number of Hours of Service (not exceeding 501) necessary to prevent an Employee from incurring a One-Year Break in Service, and shall credit all such Hours of Service to the Plan Year in which the Employee’s absence begins or, if the Employee does not need these Hours of Service to prevent a One-Year Break in Service in such Plan Year, to the immediately following Plan Year. Any Parental Leave in excess of the leave provided under the federal Family Medical Leave Act shall not be credited for purposes of calculating a Participant’s Accrued Benefit.

“Parental Leave” means a period of an Employee’s absence from active employment (i) by reasons of the pregnancy of the Employee, (ii) by reasons of the birth of a child of the Employee, (iii) by reasons of placement with the Employee in connection with the adoption of such child by the Employee, or (iv) for purposes of caring for a child for the period beginning immediately following such birth or placement.

“Participant” means an Eligible Employee who has entered the Plan after meeting the requirements of ARTICLE II of this Plan.

“Pay Credit” means a credit applied to Cash Balance Accounts on the last day of each calendar quarter pursuant to Section 3.2.

“Plan” means the Hecla Mining Company Retirement Plan, as set forth herein, and any amendments hereto.

“Plan Year” means the twelve (12) month period ending December 31st.

“Qualified Domestic Relations Order” or “QDRO” means any judgement, decree, or order (including court approval of a property settlement agreement) relating to the provision of child support, alimony payment, or marital property rights to an Alternate Payee. A QDRO must (a) be made pursuant to a state domestic relations law (including community property law), (b) concern the creation or recognition of an Alternate Payee’s right to receive all or a portion of the benefits that would otherwise be payable to a Participant or other Beneficiary under the Plan, and (c) meet the requirements of Code Section 414(p). Whether any domestic relations order is a “Qualified Domestic Relations Order” is determined in the sole discretion of the Administrator, and not by the issuing court.

“Qualified Pre-Retirement Survivor Annuity” or “QPSA” means an annuity paid for the lifetime of an Eligible Spouse of a Participant. A QPSA is paid only under certain circumstances, and only when the Participant has received no prior Plan benefit. In all events, a QPSA shall be defined to reflect Treasury Regulation Section 1.401(a)-20.

“Reemployment Commencement Date” means the date on which a person first performs an Hour of Service following a Termination of Employment.

“Required Beginning Date” means April 1 of the calendar year following the later of the calendar year in which the Participant retires or the calendar year in which such Participant attains the age prescribed under Code Section 401(a)(9) and the Treasury Regulations promulgated thereunder. If a Participant is a 5% owner (as defined in Code Section 416), distribution of such Participant’s benefit shall be made or commence to be made by April 1 of the calendar year following the calendar year in which the Participant attains the age prescribed under Code Section 401(a)(9) and the Treasury Regulations promulgated thereunder or thereafter.

“Rio Tinto Supplement Participant” means an Eligible Employee who had an accrued benefit under the Rio Tinto America, Inc. Retirement Plan as of April 16, 2008.

“Section 415 Compensation” means a Participant’s wages, salaries, fees for professional service, and all other amounts received for personal services actually rendered in the course of employment with an Employer or an “affiliated employer” paid to him for such period, but excluding (i) contributions (other than elective contributions described in Code Section 402(e)(3), 408(k)(6), 408(p)(2)(A)(i), or 457(b)) made on behalf of the Participant by an Employer or an “affiliated employer” to a plan of deferred compensation (including a simplified employee pension described in Code Section 408(k) or a simple retirement account described in Code Section 408(p)), whether or not qualified, to the extent that, before application of the limitations of Code Section 415 to such plan, the contributions are not includable in the gross income of the Participant for the taxable year in which contributed, (ii) any distributions from a plan of deferred compensation, whether or not qualified, (except amounts received pursuant to an unfunded non-qualified plan in the year such amounts are includable in the gross income of the Participant), (iii) amounts realized from

the exercise of a non-qualified option or when restricted stock or other property held by the Participant either becomes freely transferable or is no longer subject to substantial risk of forfeiture, (iv) amounts received from the sale, exchange or other disposition of stock acquired under a qualified stock option, (v) any other amounts that receive special tax benefits, such as premiums for group term life insurance (but only to the extent that the premiums are not includable in the gross income of the Participant and are not salary reduction amounts that are described in Code Section 125), and (vi) other items that are similar to the items listed in (i) through (v) above.

Section 415 Compensation includes (i) any elective deferral, as defined in Code Section 402(g)(3) and (ii) any amount contributed or deferred by the Employer at the Participant’s election which is not includable in the Participant’s gross income by reason of Code Section 125, 132(f)(4), or 457.

If a Participant has a severance of employment (as defined in Treasury Regulation Section 1.415(a)-1(f)(5)) with the Employer and all affiliated employers, Section 415 compensation does not include amounts received by the Participant following such severance of employment except amounts paid before the later of (a) the close of the Limitation Year in which the Participant’s employment terminates or (b) within 2½ months of such severance if such amounts:

Notwithstanding any other provision of the Plan to the contrary, effective January 1, 2009, if a Participant is absent from employment as an Employee to perform service in the uniformed services (as defined in Chapter 43 of Title 38 of the United States Code), their Section 415 Compensation will include any differential pay, as defined hereunder, that they receive or are entitled to receive from their Employer. For purposes of this paragraph, “differential pay” means any payment made to the Participant by the Employer with respect to a period during which the Participant is performing service in the uniformed services while on active duty for a period of more than 30 days that represents all or a portion of the wages the Participant would have received if they had continued employment with the Employer as an Employee.

In no event, however, shall the compensation of a Participant considered under the Plan for any calendar year exceed the Code Section 401(a)(17) limit in effect for such calendar year, subject to adjustment annually as provided in Code Sections 401(a)(17)(B) and 415(d). Effective for calendar years beginning on and after July 1, 2007, the limit described in this paragraph shall be applied annually to Section 415 Compensation earned in such calendar year and Section 415 Compensation for a calendar year shall not increase as a result of an increase in the Code Section 401(a)(17) limit applicable to a future calendar year.

To be included in a Participant’s Section 415 Compensation for a particular calendar year, an amount must have been received by the Participant (or would have been received, but for the Participant’s election under Code Section 125, 132(f)(4), 401(k), 402(h)(1)(B), 403(b), 408(p)(2)(A)(i), or 457) within such calendar year.

“Single Life Annuity” means an annuity providing level monthly payments over the life of the annuitant.

“Social Security Retirement Age” shall mean age sixty-five (65) for individuals born before January 1, 1938, age sixty-six (66) for individuals born before January 1, 1955 and age sixty-seven (67) for individuals born on or after January 1, 1955.

“Social Security Taxable Wage Base” shall mean the contribution and benefit limit in effect under Code Section 3121(a)(1).

“Spouse” means the individual, if any, to whom the Participant is lawfully married on the date of the Participant’s death, or on the Participant’s Annuity Starting Date, whichever is earlier. A Participant’s marital status is determined under applicable state law. Notwithstanding any other provision of this Section, a former Spouse shall be treated as the Participant’s Spouse to the extent provided under a Qualified Domestic Relations Order.

“Spousal Consent” means an Eligible Spouse’s written consent which acknowledges the effect of the Participant’s election and is witnessed by a Plan representative or a notary public. Once made, consent shall be irrevocable unless the Participant revokes their election to waive the qualified Joint and Survivor Annuity or the Qualified Pre-Retirement Survivor Annuity, as applicable; upon such event, consent shall be deemed to be revoked. Notwithstanding the foregoing, Spousal Consent is not required if the Participant establishes to the satisfaction of a Plan representative that such written consent may not be obtained because there is no Eligible Spouse or that the Eligible Spouse cannot be located. In addition, no Spousal Consent is necessary if the Participant has been legally separated or abandoned within the meaning of local law and the Participant provides the Plan representative with a court order to that effect, so long as such court order does not conflict with a Qualified Domestic Relations Order. If the Eligible Spouse is legally incompetent to consent, the Eligible Spouse’s legal guardian may consent on her behalf, even if the legal guardian is the Participant.

“Termination of Employment” means a Participant’s separation from service with the Controlled Group by reason of resignation, retirement, discharge, disability or death.

“Total Disability” or “Totally and Permanently Disabled” means that a Participant is determined by the Administrator to be disabled as a result of an illness or injury to the extent that the Participant is prevented from performing any work or engaging in any occupation for wage or profit. A determination of permanent disability by the Social Security Administration shall be conclusive evidence of Total Disability. A Participant shall not be considered Totally and Permanently Disabled if the disability resulted from the Participant engaging in a criminal enterprise, habitual drunkenness, addiction to narcotics, a self-inflicted injury, or resulted from military service.

“Traditional Pension Participant” means a Participant who is:

A Participant who was a Traditional Pension Participant as defined in (a) or (b) above when they first became a Participant shall continue to be a Traditional Pension Participant notwithstanding a transfer of employment to a different Controlled Group Member or a rehire following a Termination of Employment so long as they are an Eligible Employee, provided that no Employee rehired or transferred from an ineligible position to an Eligible Employee position on or after July 19, 2024 may reenter the Plan as an active participant or recommence participation in or benefit accrual under the Plan.

“Trust” means the legal entity created by the Trust Agreement(s) and incorporated by reference as part of the Plan to hold Plan assets.

“Trust Agreement” means an agreement between the Company and a Plan Trustee.

“Trustees” means U.S. Bank and any duly appointed successor. Trustee shall also include all other trustees and custodians who receive, hold, invest, and disburse assets of the Trust fund in accordance with the terms and provisions set forth in the Plan and Trust Agreement(s).

“Year of Service” means a computation period in which the Employee completes at least 1,000 Hours of Service. For purposes of determining whether an Employee has completed a Year of Service in order to be eligible to participate in the Plan, the applicable computation period is the 12 consecutive month period beginning with the date on which the Employee first performs an Hour of Service or, if they do not complete 1,000 Hours of Service during such period, the Plan Year commencing within such 12-month period or any Plan Year thereafter. For all other purposes, the computation period is the Plan Year. Years of Service include any period of Military Service for a reemployed veteran which is required to be included under Code Section 414(u). For purposes of determining whether a participant is eligible for Early Retirement Benefits pursuant to ARTICLE IV and vesting pursuant to ARTICLE VI, Years of Service include years of service with Greens Creek completed prior to April 16, 2008. Notwithstanding any provision of the Plan to the contrary, any Employee rehired or transferred from an ineligible position to an Eligible Employee position on or after July 19, 2024 shall not accrue a Year of Service on or after the date of rehire or transfer except for the purpose of determining (1) attainment of Early Retirement Age, (2) eligibility for an Early Retirement Benefit and (3) vesting under Article IV.

Article II

ELIGIBILITY AND PARTICIPATION

Participation in the Plan shall continue until a Participant has a Termination of Employment and a One-Year Break in Service. A Participant who has a Termination of Employment but has not received a complete distribution of their Accrued Benefit shall be an inactive Participant.

A Participant who has a Termination of Employment with the Controlled Group and is subsequently re-hired as an Eligible Employee prior to incurring a One-Year Break in Service, shall again become an active Participant on their Reemployment Commencement Date.

An Eligible Employee who has a Termination of Employment with the Controlled Group before becoming a Participant and is subsequently re-hired as an Eligible Employee before incurring a One-Year Break in Service shall become a Participant on their Reemployment Commencement Date if they previously completed a Year of Service but were not employed on their Entry Date. Otherwise, such re-hired Employee shall become a Participant on the date that they complete one Year of Eligibility Service following their most recent Reemployment Commencement Date.

Notwithstanding any provision of the Plan to the contrary, no Employee with a Reemployment Commencement Date on or after July 19, 2024 may commence or recommence active participation in or benefit accrual under the Plan.

A Participant who ceases to be an Eligible Employee, but who has not had a Termination of Employment, shall become a suspended Participant. A suspended Participant shall not accrue any additional benefits under the Plan during the period of suspension. However, a suspended Participant shall continue to be credited with all service while employed by the Controlled Group for purposes of vesting.

Notwithstanding any provision of the Plan to the contrary, contributions, benefits and service credit with respect to Military Service will be provided in accordance with Code Section 414(u). In the case of a Participant who dies while performing Military Service, the survivors of such Participant shall receive any additional benefits (other than benefit accruals relating to the period of such Military Service) provided under the Plan had the Participant resumed and then terminated employment with an Employer on account of death.

Article III

NORMAL RETIREMENT BENEFITS

A Participant may retire on attainment of Normal Retirement Age and shall be entitled to a Normal Retirement Benefit equal to their Accrued Benefit.

The Accrued Benefit of a Traditional Pension Participant who had a Termination of Employment before July 1, 2000 is a monthly benefit payable at Normal Retirement Age equal to one-twelfth (1/12) of the sum of (i) and (ii):

The Accrued Benefit of a Traditional Pension Participant who is an Eligible Employee on or after July 1, 2000 is a monthly benefit payable at Normal Retirement Age equal to one-twelfth (1/12) of the sum of (i) and (ii):

The Average Compensation of a Traditional Pension Participant calculated under this Section 3.1 shall not be less than the Participant’s Average Compensation determined as of June 30, 2013.

The Accrued Benefit of a Participant identified in Appendix I shall be adjusted by the percentage and limitations stated therein. For any Traditional Pension Participant whose Average Compensation is sufficient to generate a retirement benefit, said retirement benefit shall be not less than a minimum of $13.33 per month.

The Annuity Starting Date for the Accrued Benefit of a Cash Balance Participant shall be any date after Termination of Employment elected by the Cash Balance Participant with respect to benefits accrued as of June 30, 2013. The Annuity Starting Date for the Accrued Benefit of a Cash Balance Participant shall be the Participant’s Normal or Early Retirement Date with respect to benefits accrued after June 30, 2013. Notwithstanding the foregoing, if a Cash Balance Account accrued after June 30, 2013 has a present value of $7,000 or less, disregarding the value of the Participant’s Cash Balance Account as of June 30, 2013 and any Rio Tinto supplement provided under Section 3.3, the Annuity Starting Date shall be any date after Termination of Employment elected by the Cash Balance Participant. A Cash Balance Account shall be established and maintained in the name of each Cash Balance Participant. Cash Balance Accounts are nominal, bookkeeping accounts used to determine the benefit of each Cash Balance Participant. No Cash Balance Participant shall have an actual individual account under this Plan, nor shall any Cash Balance Participant have any claim to or interest in any particular assets of the Trust. Each Cash Balance Account shall consist of the sum of the Cash Balance Participant’s Pay Credits and Interest Credits.

As of the last day of each Plan Year quarter, a Pay Credit shall be added to the Cash Balance Account of each Cash Balance Participant who receives Compensation during such quarter. The amount of the quarterly Pay Credit shall be equal to the sum of (A) and (B):

For each Plan Year quarter starting on or after July 1, 2013, the amount of the Pay Credit for each Cash Balance Participant who was an active Participant in the Plan as of June 30, 2013, shall be equal to 6% of the Cash Balance Participant’s Compensation paid during the quarter.

The amount of the Pay Credit for each Cash Balance Participant hired on or after July 1, 2013, shall be equal to the product of the Participant’s Compensation and the Pay Credit Percentage as shown below:

Solely for purposes of this subsection (ii), in the case of a Participant who is rehired following a Termination of Employment, Credited Service used to determine the applicable percentage shall include both service prior to and after the Termination of Employment, unless the Participant has incurred five consecutive One-Year Breaks in Service. Notwithstanding the foregoing, no Employee transferred from an ineligible position to an Eligible Employee position or rehired on or after July 19, 2024 shall earn Credited Service upon transfer or reemployment.

As of the last day of each calendar quarter, each Cash Balance Account as of the end of the previous calendar quarter shall be credited with interest at a rate equal to the quarterly rate of change in the Consumer Price Index for all Urban Consumers (CPI-U) plus three-quarters of one percent (3/4%), but in no event shall the quarterly interest rate be less than zero. Interest Credits shall accrue through the last calendar quarter prior to the Cash Balance Participant’s Annuity Starting Date.

The monthly Accrued Benefit of a Rio Tinto Supplement Participant shall also include a supplemental amount calculated as the adjusted sum of (a) and (b) minus the sum of (c) and (d):

For purposes of this Section 3.3, the supplemental benefit shall be calculated using the definitions of benefit service, Final Average Earnings and Monthly Covered Compensation that were in the Rio Tinto America, Inc. Retirement Plan as amended and restated effective January 1, 2007 as replicated in Appendix III hereto.

For purposes of (a) and (b), Appendix III Final Average Earnings shall be calculated by considering all years of compensation before and after April 16, 2008.

For purposes of (c) and (d), Frozen Appendix III Final Average Earnings shall be calculated by considering only compensation prior to April 16, 2008, and Covered Compensation shall be calculated as if the participant had terminated employment on April 15, 2008.

The Plan has, from time to time, provided Early Retirement window benefits. As of the Effective Date, the time period for electing such benefits has closed and no Early Retirement window benefits are available to active Participants. The terms governing any Early Retirement window benefits currently being paid are those that were in effect as of the date such Early Retirement window program went into effect.

A Traditional Pension Participant who continues in employment with their Employer or a Controlled Group Member after their Normal Retirement Date shall be entitled to a monthly pension payable in the form of a Single Life Annuity which shall be the greater of the Actuarial Equivalent of the benefit the Participant would have received if their Annuity Starting Date had been their Normal Retirement Date and their Accrued Benefit determined as of their actual Annuity Starting Date.

A Cash Balance Participant who continues employment with the Employer or a Controlled Group Member beyond their Normal Retirement Age shall continue to accrue benefits and shall be entitled to receive a benefit commencing after their Termination of Employment equal to the Actuarial Equivalent of their Cash Balance Account as of their Annuity Starting Date.

Notwithstanding any provision of the Plan to the contrary, payment of a Participant’s benefit under the Plan shall be made, or commence to be made, not later than their Required Beginning Date.

Distributions prior to Early Retirement Age are not allowed except for payment of disability benefits, lump-sum payments of under $7,000 or Cash Balance Accounts accrued as of June 30, 2013.

In no event shall such Participant’s benefit on subsequent retirement be less than the Early Retirement window benefit being received by the Participant prior to their reemployment.

If a Participant received an Early Retirement Window Additional Benefit that was suspended during a period of reemployment, the Participant will be entitled to receive a re-determined Early Retirement Window Additional Benefit based on the annualized rate of base salary at the date of the Employee’s re-retirement and inclusive of the number of years and months of continuous employment for the period of time from the date of the Employee’s reemployment to the date of the Employee’s re-retirement, reduced by the Actuarial Equivalent value of the Early Retirement Window Additional Benefit received.

Article IV
EARLY RETIREMENT BENEFITS

With respect to benefits accrued as of June 30, 2013, a Cash Balance Participant may elect to commence payment of their vested Accrued Benefit at any time following Termination of Employment. With respect to benefits accrued after June 30, 2013, a Cash Balance Participant may elect to commence payment of their vested Accrued Benefit on or after their Early Retirement Date, except that benefits accrued after June 30, 2013 may commence on any date after Termination of Employment elected by the Cash Balance Participant if such benefits have a present value of $7,000 or less, disregarding the value of the Participant’s Cash Balance Account as of June 30, 2013 and any Rio Tinto supplemental benefit provided under Section 3.3.

Article V
DISABILITY AND DEATH BENEFITS

If a Traditional Pension Participant has completed ten (10) Years of Service, becomes Totally and Permanently Disabled while actively employed by an Employer, and is not receiving workers compensation, occupational disease, military or other similarly benefits for their disability, they shall be eligible for a monthly disability benefit. The disability benefit shall be equal to the monthly pension they would have received for Normal Retirement based upon their service up to their disability retirement date and shall commence on the first day of the month following the date the Administrator determines that the Participant is Totally and Permanently Disabled.

If a Traditional Pension Participant is Totally and Permanently Disabled prior to completing ten (10) Years of Service, time during which an Employee or former Employee is receiving benefits under a Hecla Mining Company non-occupational disability plan, insurance or related plan for permanent disability, or workmen’s compensation plan paid for by the Employer, shall be taken into account for the purposes of computing Years of Service solely for purposes of determining the Participant’s eligibility for a disability benefit and shall not be counted for the purposes of computing the Participant’s Accrued Benefit. Notwithstanding any provision of the Plan to the contrary, an Employee hired, rehired or transferred from an ineligible position to an Eligible Employee position on or after July 19, 2024 shall not earn a Year of Service on or after the date of such hire, rehire or transfer for purposes of determining eligibility for a disability benefit under this section.

The disability benefit provided by this Section shall end on the first day of the month following the earliest of the date when the Participant (i) is no longer Totally and Permanently Disabled, (ii) attains their Normal Retirement Age or (iii) dies. If the monthly benefit payments being paid as a result of a Participant being Totally and Permanently Disabled cease due to the Participant attaining their Normal Retirement Date, their Accrued Benefit shall be determined and paid in accordance with Sections 3.1, 3.2 and/or 3.3 as applicable, as if they incurred a Termination of Employment on the date they became Totally and Permanently Disabled. The Administrator shall have the right to require any Participant receiving a monthly disability pension to be examined by a physician of the Administrator’s choice not more often than once in each calendar year to determine if the Participant continues to be Totally and Permanently Disabled. If the Company determines, at any time prior to their Normal Retirement Date, that any such Participant is not Totally and Permanently Disabled, their disability pension allowance shall cease.

If a Participant’s Annuity Starting Date was prior to July 1, 1986, the Participant’s Eligible Spouse, if any, shall receive a monthly benefit payable for thirty-six (36) consecutive months equal to the lesser of $75.00 and the monthly retirement benefit the Participant was receiving from the Plan immediately prior to their death.

Article VI
VESTED BENEFITS

Upon a Termination of Employment, other than due to death or Normal Retirement, a Participant shall be entitled to receive a benefit equal to the product of their Accrued Benefit multiplied by their vested percentage as set forth in the applicable vesting schedule.

A Traditional Pension Participant’s vested interest in their Accrued Benefit shall be determined in accordance with the following schedule:

A Cash Balance Participant’s vested interest in their Accrued Benefit shall be determined in accordance with the following schedule:

A Participant shall be fully vested in their Accrued Benefit upon the date the Participant attains Normal Retirement Age while an Employee or dies while an Employee.

All of an Employee’s Years of Service shall be counted, except the following Years of Service which shall be disregarded for purposes of determining Years of Service for vesting:

If a Participant has a Termination of Employment before their Accrued Benefit is fully vested, the non-vested portion of their Accrued Benefit shall be immediately forfeited on the date the Participant incurs five consecutive One-Year Breaks in Service or, if earlier, upon a distribution to the Participant of their vested Accrued Benefit. However, if a portion of a Participant’s Account is forfeited upon a distribution to the Participant of their vested Accrued Benefit and the Participant has not incurred five consecutive One-Year Breaks in Service, the amount forfeited will be restored following their Reemployment Commencement Date upon repayment to the Plan by the Participant of the amount distributed. The repayment must be made to the Plan in cash and in a lump sum within five years following their Reemployment Commencement Date. For this purpose, a Participant who has terminated with no vested interest in their Accrued Benefit shall be deemed to have received a distribution of their entire vested interest on their Termination of Employment and shall be deemed to have repaid the distribution on their new Employment Commencement Date.

Article VII
FORMS OF BENEFIT

Unless the Participant has made an affirmative election to have their Accrued Benefit paid in an optional form of benefit, the Accrued Benefit to which the Participant is otherwise entitled shall be automatically payable in the Normal Form in accordance with the following:

A Participant may elect to receive their Accrued Benefit in one of the following optional forms:

Effective January 1, 2008, any lump sum payments will be subject to the restrictions of Code Section 436(d), concerning lump sum distributions for underfunded plans.

Notwithstanding any provision in the Plan to the contrary, a Participant’s benefit shall be distributed over a period that does not exceed:

Notwithstanding any provision of the Plan to the contrary, if a Cash Balance Participant elects (1) a lump sum distribution it shall be equal to the current balance of their vested Cash Balance Account and (2) an annuity option then it will be the Actuarial Equivalent of the vested Cash Balance Account as of the date of distribution.

Elections as to the commencement or form of benefit payments shall be made in accordance with and subject to such rules and procedures as the Administrator shall establish. Such elections may be made at any time during the Election Period. Any election by a Participant who has a Spouse on their Annuity Starting Date or a form of payment other than a 50% Joint and Survivor Annuity shall be invalid unless their Spouse consents in writing to such election within the Election Period. A Participant’s Spouse shall be deemed to have given written consent to the Participant’s waiver and election if the Participant establishes to the satisfaction of a Plan representative that such consent cannot be obtained because of any of the following circumstances:

Any written Spousal Consent given pursuant to this section shall acknowledge the effect of the waiver of the 50% Joint and Survivor Annuity form of payment and of the election of an optional form of benefit, shall specify the optional form of benefit selected by the Participant and shall be witnessed by a Plan representative or a notary public. Any written consent given or deemed to be given by a Participant’s Spouse shall be effective only with respect to such Spouse and not with respect to any subsequent Spouse. Any waiver of the 50% Joint and Survivor Annuity made before retirement shall become effective on the date of retirement. Any change in the election to waive the Joint and Survivor Annuity made after retirement shall comply with the requirements set forth above and shall become effective two (2) years after the date of such change or election provided that the Participant and their Spouse are alive at the end of the two year period (unless (i) the

Participant died from accidental causes, (ii) failure to give effect to the change would deprive the survivor of a survivor annuity, and (iii) the election or revocation was made before the accident occurred).

Notwithstanding any provision of the Plan to the contrary that would otherwise limit a distributee’s election under this Article, a distributee may elect, at the time and in the manner prescribed by the Administrator, to have any, all, or a portion that is equal to at least $500, of an Eligible Rollover Distribution paid directly to an Eligible Retirement Plan specified by the Distributee in a Direct Rollover. For purposes of this Section, the following terms shall have the following meanings:

Article VIII
LIMITATIONS ON BENEFITS

Notwithstanding any provision of the Plan to the contrary, a Participant’s annual Accrued Benefit for any Limitation Year shall not exceed the limitations of Code Section 415(b), as adjusted in accordance with Code Section 415(d), which are hereby incorporated by reference. In applying Code Section 415 and the Treasury Regulations promulgated thereunder, the following definition shall apply:

The limitation set forth in this paragraph does not apply to any payment of a benefit which under Code Section 411(a)(11) may be immediately distributed without the consent of the Participant. If an optional form of benefit that is otherwise available under the terms of the Plan is not available to a Participant or Beneficiary as of the Annuity Starting Date because of the application of the requirements of this paragraph, the Participant or Beneficiary is permitted to elect to bifurcate the benefit into unrestricted and restricted portions (as described in Treasury Regulation Section 1.436-1(d)(3)(iii)(D)). The Participant or Beneficiary may also elect any other optional form of benefit otherwise available under the Plan at that Annuity Starting Date that would satisfy the 50%/PBGC maximum benefit guarantee amount limitation described in this paragraph, or may elect to defer the benefit in accordance with any general right to defer commencement of benefits under the Plan.

The limitation set forth in this paragraph does not apply to any amendment to the Plan that provides a benefit increase under a Plan formula that is not based on compensation, provided that the rate of such increase does not exceed the contemporaneous rate of increase in the average wages of Participants covered by the amendment.

Article IX
TOP HEAVY RULES

The provisions of this Article are intended to enable the Plan to conform to the requirements of Code Section 416 as the same may apply to the Plan from time to time, and the provisions of this Article shall be construed and interpreted to effectuate such intent.

For purposes of this Article, the following terms have the following meanings:

The determination of which persons are Key Employees shall be made in accordance with the applicable provisions of Code Section 416(i). Not in limitation of the foregoing, for purposes of subsections (ii) and (iii) above, Code Section 318(a)(2)(C) shall be applied by substituting “5%” for “50%” therein.

A Participant’s “Section 416 Benefit Service” means the sum of such Participant’s Credited Service, not in excess of 120 months, taking into account only those Months of Service that occur during a Plan Year (A) that begins on or after September 24, 1984, (B) for which the Plan is Top-Heavy and (C) with respect to which such Participant is not a Key-Employee. A Participant’s “Average Section 416 Compensation” means such Participant’s Average Compensation determined by (A) substituting “415 Compensation” (determined monthly) for “Compensation” each place the latter term appears in the definition of “Average Compensation” and (B) disregarding 415 Compensation for periods of time before January 1, 1984 or after the end of the last Plan Year for which the Plan is Top-Heavy, during which such Participant is a Key Employee or which may otherwise be disregarded under Code Section 416(c).

If the Plan is Top-Heavy for a Plan Year, the following vesting schedule (the “Top-Heavy Vesting Schedule”) shall be applicable for such Plan Year for purposes of determining the vested interest of a Traditional Pension Participant in their Accrued Benefit if such Participant completes at least one Hour of Service during such Plan Year, unless applying the otherwise applicable benefit schedule results in a greater vested percentage:

Top-Heavy Vesting Schedule

The Top-Heavy Vesting Schedule shall only be applicable for Plan Years for which the Plan is Top-Heavy, and the vesting schedule that shall be applicable for any Plan Year for which the Plan is not Top-Heavy shall be determined without regard to this Section irrespective of whether the Plan was Top-Heavy for any prior Plan Year. Notwithstanding the foregoing, however, once the Top-Heavy Vesting Schedule has become applicable for a Plan Year, any change pursuant to the preceding sentence from the Top-Heavy Vesting Schedule to a vesting schedule determined without regard to this Section shall be subject to the restrictions and conditions on vesting schedule amendments or changes as required by the Code.

Article X
REQUIRED MINIMUM DISTRIBUTIONS

Article XI

CONTRIBUTIONS AND TRUST FUND

Individual Participants may not make contributions to this Plan. All contributions must be made by the Employer.

Article XII

ESTABLISHMENT OF TRUST

Contributions made by the Employer pursuant to Article III hereof, and all other assets of this Plan shall be held in trust under a Trust Agreement. The Employer shall enter into a Trust Agreement with the Trustee for the administration of the Trust which shall contain the assets of the Plan. The Trustee shall not be responsible for the administration of this Plan but only for the Trust established pursuant to this Plan.

The Trust Agreement shall be deemed to be a part of this Plan, and any rights or benefits accruing to any person under this Plan shall be subject to all of the relevant terms and provisions of the Trust Agreement, including any amendments. In addition to the powers of the Trustee set forth in the Trust Agreement, the Trustee shall have any powers, express or implied, granted to it under the Plan. In the event of any conflict between the provisions of the Trust Agreement and the provisions of the Plan, the provisions of the Plan shall control, except for the duties and responsibilities of the Trustee, in which case the Trust Agreement shall control.

Article XIII

PLAN FIDUCIARIES AND ADMINISTRATION

The Retirement Committee (the “Committee”) is the Plan’s named fiduciary and plan administrator and shall have all discretionary powers necessary or proper for the purpose of administering the Plan, including (but not by way of limitation) the power to (a) interpret the terms of the Plan; (b) formulate rules and regulations necessary to administer the Plan in accordance with its terms; (c) conduct the final review of claims under the claims review procedure; (d) establish and execute the funding policy of the Plan; (e) invest Plan assets; and (f) review the funding policy and method on an annual basis. The determination or action of the Committee with respect to any questions arising out of or in connection with the management of the Trust or transaction of Committee business shall be final, conclusive, and binding on all persons having an interest in the Plan.

Any Employer shall indemnify and hold harmless the named fiduciaries and any officers or employees of the Employer to which fiduciary responsibilities have been delegated, from and against any and all liabilities, claims, demands, costs and expenses, including attorneys’ fees,

which may arise out of an alleged breach in the performance of their fiduciary duties under the Plan and under ERISA, other than such liabilities, claims, demands, costs and expenses as may result from the gross negligence or willful misconduct of such persons. The Company shall have the right, but not the obligation, to conduct the defense of such persons in any proceeding to which this paragraph applies. An Employer may satisfy its obligation under this paragraph, in whole or in part, through the purchase of a policy or policies of insurance; however, no insurer shall have any rights against the Employer arising out of this paragraph.

The costs and expenses of the named fiduciaries shall be paid from Plan assets to the extent that such costs and expenses are Plan expense under ERISA and the Code and not paid by the Company. The payment by the Company of such costs and expenses for a Plan Year shall not be deemed an election to pay the costs and expenses in any subsequent Plan Year. The Company may charge to an Employer such expenses advanced by it on behalf of the Employer.

The notice of denial shall be given within a reasonable time period but no later than 90 days after the claim received by the Administrator unless special circumstances require an extension of time for processing the claim. If such extension is required, written notice of such extension shall be furnished to the claimant within 90 days

of the date the claim was received by the Administrator stating the special circumstances requiring an extension of time and the date by which a decision on the claim can be expected, which shall be no more than 180 days from the date the claim was received by the Administrator. If no notice of denial is provided as herein described, the claimant may appeal the claim as though the claim had been denied.

The notice of denial shall be given within 45 days after the claim is received by the Administrator. This period may be extended for up to 30 days, provided that the Administrator notifies the claimant, prior to the expiration of the initial 45-day period of the reason for the extension and the date by which a decision on the claim can be expected. If, prior to the end of the first 30-day extension period, the Administrator determines that a decision cannot be rendered within that extension period, the period for making the determination may be extended for up to an additional 30 days, provided that the Administrator notifies the claimant, prior to the expiration of the first 30-day extension period, of the reason for the extension and the date as of which a decision on the claim can be expected. With respect to any extension under this paragraph, the notice of extension shall explain the standards on which entitlement to a benefit is based, the unresolved issues that prevent a decision on the claim, and the additional information needed to resolve those issues. The claimant shall be afforded at least 45 days within which to provide the specified information and the period for making the benefit determination shall be tolled from the date on which the notice of extension is sent to the claimant until the date on which the claimant responds to the request for additional information.

Any such notice of an adverse benefit determination will be provided in a culturally and linguistically appropriate manner. In addition, upon request the Administrator will provide the claimant with a statement identifying those medical or vocational experts whose advice was obtained in connection with the appeal.

No action shall be commenced by a claimant seeking judicial review of an adverse determination or by any other claimant against the Plan more than one year after the earlier of the date: (1) the decision became final; (2) the claimant had exhausted their administrative remedies under Sections 13.4 or 13.5; or (3) final proof of claim was due. All disputes under the Plan are subject to the exclusive jurisdiction of courts located in Idaho and Kootenai County in the State of Idaho.

Article XIV

AMENDMENT, TERMINATION AND MERGER

In no event shall this Plan be merged or consolidated with any other plan, nor shall there be any transfer of assets or liabilities from this Plan to any other plan unless immediately after such merger, consolidation or transfer, each Participant’s benefits, if such other plan were then to terminate, are at least equal to or greater than the benefits which the Participant would have been entitled to had this Plan been terminated immediately before such merger, consolidation or transfer

Article XV

MISCELLANEOUS

Except as permitted under Code Section 401(a)(13), no benefit, distribution or payment under the Plan to any Participant or Beneficiary or any of foregoing shall be subject to any manner to anticipation, alienation, sale, transfer, assignment, pledge, encumbrance, or charge, whether voluntary or involuntary, and any attempt to so anticipate, alienate, sell, transfer, assign, pledge, encumber or charge the same shall be void. Nor shall any such distribution or payment be in any way liable for or subject to the debts, contracts, liabilities, engagements or torts for any person entitled to such distribution or payment.

The provisions of Section 15.1 above shall not prevent the creation, assignment or recognition of any individual’s right to a benefit payable with respect to a Participant pursuant to a Qualified Domestic Relations Order (QDRO). An Alternate Payee under a QDRO shall have the same distribution rights as a Participant, except that an Alternate Payee shall not be eligible to elect any form of Joint and Survivor Annuity with their subsequent spouse. An Alternate Payee who is designated as a Beneficiary in a QDRO shall be treated as such Participant’s Beneficiary to the extent provided in such order. The Administrator shall direct that payments under a QDRO be made by the Trustee pursuant to the QDRO.

Neither the establishment of this Plan, nor any modification thereof, nor the payment of any benefit, shall be construed as giving any Participant, or any other person whomsoever, any legal or equitable right against the Employer or the Trustee, unless the same shall be specifically provided for in this Plan, or conferred by affirmative action of the Trustee or the Employer, in accordance with the terms and provisions of this Plan, or as giving any Employee or Participant the right to be retained in the service of the Employer, as all Employees shall remain subject to discharge by the Employer to the same extent as if this Plan had never been adopted.

Except as provided in this Section 15.4, Plan assets shall never inure to the benefit of an Employer; such assets shall be held for the exclusive purpose of providing benefits to Participants and their Beneficiaries and for defraying the reasonable administrative expenses of the Plan.

The Plan hereby created shall be construed, administered and governed in all respects in accordance with ERISA and the laws of the State of Idaho; provided, however, that if any provision of this Plan is susceptible of more than one interpretation, such interpretation shall be given thereto as is consistent with the Plan being a qualified employees’ pension plan under the provisions for qualification set forth in the Code. If any provision of this Plan shall be held by a court of competent jurisdiction to be invalid or unenforceable, the remaining provisions shall continue in full force and effect.

Any payment to any Participant, or to their legal representative or Beneficiary, in accordance with the provisions of the Plan, shall to the extent thereof be in full satisfaction of all claims hereunder against the Trustee, the Committee and the Employer, any of whom may require such Participant, legal representative or Beneficiary, as a condition precedent to such payment, to execute a receipt therefor in such form as shall be determined by the Trustee, the Committee or the Employer, as the case may be. The Employer does not guarantee the Trust, the Participants, former Participants or their Beneficiaries against loss of or depreciation in value of any right or benefit that any of them may acquire under the terms of this agreement. All benefits payable hereunder shall be paid or provided for solely from the Trust, and the Employer does not assume any liability or responsibility therefor.

Each person eligible to receive benefits under this Plan must file with the Administrator in writing or by secure electronic means their mailing address and each change of address until payment of their benefit is made. Any communication, statement, or notice addressed to such person at their last mailing address filed with the Administrator or Trustee (or if no mailing address was filed with the Administrator or Trustee, then their last mailing address shown by the Employees’ payroll records) will be binding upon such person for all purposes of this Plan. If the Administrator is unable after diligent attempt to locate a Participant or Beneficiary who is entitled to a benefit under the Plan or receiving a benefit from the Plan, the benefit otherwise payable to such Participant or Beneficiary shall be forfeited and benefit payments stopped, as applicable. If a benefit is forfeited because the Administrator determines that the Participant or Beneficiary cannot be found, such benefits shall be reinstated by the Company only if a claim is filed by the Participant or in the case of a death benefit, a Beneficiary, with the Administrator and the Administrator verifies the validity of the claim. For avoidance of doubt, the Plan shall only reinstate payments due during the lifetime of a Participant if proof of life is provided to the Administrator’s satisfaction. Notwithstanding the above, forfeiture of a Participant’s or Beneficiary’s benefit may occur only if a distribution could be made to the Participant or Beneficiary without obtaining the Participant’s or Beneficiary’s consent in accordance with the requirements of Section 1.411(a)-11 of the Treasury Regulations.

Article XVI

PARTICIPATING EMPLOYERS

With the consent of the Company, a Controlled Group Member which is not an Employer under the Plan and Trust may adopt the Plan and Trust and thereby become an Employer in such manner as shall be mutually agreeable between the Company and such Controlled Group Member.

Each Employer hereby authorizes and empowers the Company:

IN WITNESS WHEREOF, the Company, on behalf of all Employers, has adopted this amendment and restatement of the Plan on the____ day of ___________, 2025.

APPENDIX I

Normal Retirement Benefits for Certain Employees Under Article III

A. Effective July 1, 2000 the Normal Retirement Benefit for the following Participants shall thereafter be increased by the following percentages:

B. In no event shall the Normal Retirement Benefit exceed the benefit that would be determined if Compensation included amounts deferred into the Hecla Mining Company Executive Deferral Plan and amounts excluded under Code Section 401(a)(17), and if compensation and service credited under any employment agreement between the Employee and Employer which so provides are included for purposes of determining retirement benefits.

C. In no event shall the above percentage increases cause the Plan to fail the nondiscrimination tests of Code Section 401(a)(4) and the Treasury Regulations promulgated thereunder. If at any time the increases would cause the Plan to fail the nondiscrimination tests of Code Section 401(a)(4), such percentages shall be decreased for each listed Participant on a proportional basis.

D. In no event shall any benefits provided under the Plan exceed the limitations of Code Section 415 as provided in Article VIII.

APPENDIX II

Normal Retirement Benefits for Certain Employees Under Article III

A. Effective August 1, 2005, the Normal Retirement Benefit for the following Participant(s) shall thereafter be increased by the following percentages:

APPENDIX III

Rio Tinto America Inc. Retirement Plan Definitions Under Article III

A Rio Tinto Supplement Participant’s supplemental benefits provided pursuant to Section 3.3, shall be calculated in accordance with the terms defined by the Rio Tinto America Inc. Retirement Plan, as amended and restated effective January 1, 2007, which are replicated below. References to section numbers in the provisions below are references to the sections of the Rio Tinto America Inc. Retirement Plan as amended and restated effective January 1, 2007.

Benefit Service for any Participant shall equal the sum of their Benefit Service attributable to employment prior to January 1, 2003 as determined in accordance with the Plan as in effect on December 31, 2002 and their Benefit Service attributable to employment after December 31, 2002 as determined in accordance with this Section 2.03.

Each Eligible Employee shall be credited with Benefit Service under the Plan for the period or periods during which such Eligible Employee maintains an employment relationship with the Employer or an Affiliated Employer. An Eligible Employee’s employment relationship shall begin on the date the Eligible Employee first completes an Hour of Service as an Eligible Employee and shall end on their Severance from Service Date.

Except as provided in Sections 2.03(e) and (g) all periods of an Employee’s Benefit Service, whether or not consecutive, shall be aggregated. Benefit Service attributable to employment on or after January 1, 2003 shall be measured in elapsed years and fractions of years whereby each completed calendar month shall constitute one-twelfth of a year and days (based on a 30-day month) when aggregated shall constitute a fraction of a year equal to the number of days divided by 365.

Notwithstanding any contrary provision of this Section 2.03, in the case of an Eligible Employee whose Employment Commencement Date (or if applicable, their Reemployment Commencement Date) is after December 1, 2002 and on or before December 1, 2003 and who completes a Year of Eligibility Service during the 12-month period that begins on such Employment Commencement Date (or if applicable, their Reemployment Commencement Date), Benefit Service attributable to service after December 31, 2002 for such Eligible Employee shall also include the period of employment between their Employment Commencement Date and December 31, 2002. Benefit Service attributable to such period of employment shall be determined in accordance with the Plan as in effect on December 31, 2002.

Except as provided in Section 7.04(c), no service earned under any qualified plan maintained by the Employer other than the Plan, the Kennecott Plan, the Luzenac Plan or the U.S. Borax Plan shall be counted as Benefit Service under the Plan.

If an Employee or Participant incurs a one-year Period of Severance and is subsequently rehired and has no nonforfeitable Accrued Benefit at the time of their one-year Period of Severance, their years Benefit Service prior to such one-year Period of Severance shall not be taken into account if the number of consecutive one-year Periods of Severance equals or exceeds the greater of (i) five, or (ii) their total years of Benefit Service prior to the one-year Period of Severance.

If an Employee or Participant incurs a one-year Period of Severance and they are subsequently rehired and (i) they have a nonforfeitable interest in their Accrued Benefit, or (ii) the number of consecutive one-year Periods of Severance is less than the greater of (A) five, or (B) their total of years of Benefit Service prior to the one-year Period of Severance, their years of Benefit Service prior to such one-year Period of Severance shall be restored to them.

In the event a Participant receives a distribution in accordance with Section 8.02(c) by the end of the second Plan Year following the Plan Year in which their termination occurs and they are reemployed, the Benefit Service that is attributable to such distribution shall not be counted in determining the benefits they accrue subsequent to their Reemployment Commencement Date.

Notwithstanding the other provisions of this Section 2.03, any Participant who is an IPP Participant shall cease to accrue Benefit Service after September 30, 2007.

The average of the maximum taxable wage bases in effect in each year that would be used to calculate the primary Social Security benefit for an Employee retiring at their Social Security Retirement Age.

Except as provided in Section 7.03, Final Average Earnings for a Participant shall be determined as follows:

Notwithstanding Section 7.02, for purposes of determining benefits attributable to periods of employment with U.S. Borax, Inc. for a Participant who was a participant in the U.S. Borax Plan on December 31, 2002, Final Average Earnings shall be determined in the same manner as under Section 7.02, but with Sections 7.02(e), (f) and (g) replaced with the following: