Document:

Metallica Resources Inc. - Exhibit 4.22 - Prepared By TNT Filings Inc.

 

Exhibit 4.22 

AGREEMENT 

This Agreement, entered into as of February 1, 2006, is
hereby made between Metallica Management Inc. ("Metallica" or "Client") located
at 12200 East Briarwood Avenue, Suite 165, Centennial, Colorado 80112 and the
Independent Contractor set forth below in accordance with the following terms,
conditions and provisions: 

1. Identity of Independent Contractor
(hereinafter "IC"): 

Robert Martinez - Consulting Engineer 

  2477 E. Packsaddle Dr. 

  Coeur d'Alene, ID 83815 

  Telephone: (208) 772-7363 

Social Security Number or Federal E.I.N.: ____________ 

	
    Type of
    Entity:
	[x] Sole
    proprietorship	[ ] Partnership
	
     
	[ ] Corporation	[ ] Limited Liability
    Company
	
     
	[ ] Other	 

2. Scope of Services to
be Performed: 

Consultant will provide management advisory and technical
  consulting services involving the design, layout and operation of the
  processing plant facility and leach pad at the Cerro San Pedro gold and silver
  project in the State of San Luis Potosi, Mexico. The services under this
  agreement will be rendered at the Cerro San Pedro project site in the State of
  San Luis Potosi, Mexico. 

3. Terms of Payment:

IC shall be compensated for his services performed pursuant
  to this Agreement at a rate of $125 per hour, not to exceed $1,000 per day. IC
  shall submit invoices to Metallica detailing the services rendered on a
  monthly or project basis. Metallica agrees to promptly pay such invoices. 

4. Reimbursement of
Expenses: 

Metallica will reimburse IC for reasonable and customary expenses incurred
  during the performance of IC's services. 

5. Equipment, Tools, Materials or Supplies:

IC shall supply all equipment, tools, materials and/or supplies to
  accomplish the services to be performed. 

6. Federal, State and Local Payroll Taxes:

Neither Federal, state or local income tax, or any payroll
  related taxes shall be withheld or paid by Metallica on behalf of IC or the
  employees of IC. IC shall not be treated as an employee with respect to the
  services performed hereunder for Federal or state tax purposes. 

 

7. Notice to IC Regarding IC's Tax Duties and Liabilities: 

IC understands that IC is responsible to pay, according to
  law, IC's income tax. If IC is not a corporation, IC further understands that
  IC may be liable for self-employment (social security and medicare) tax, to be
  paid by IC according to law.

8.
Fringe Benefits: 

Because IC is engaged in IC's own independently established business, IC is
  not eligible to participate in any employee pension, health or other fringe
  benefit plan of Metallica. 

9. Metallica Not
Responsible for Workers' Compensation: 

Metallica shall not maintain workers' compensation
  insurance concerning IC or the employees of IC. IC agrees to comply with the
  workers' compensation law concerning IC and the employees of IC, and shall
  provide to Metallica a certificate of workers' compensation insurance. 

10. Term of Agreement.

This Agreement shall begin on February 1, 2006 and shall terminate on
  December 31, 2006. 

11. Termination Without Cause:

Without cause, either party may terminate this agreement
  after giving 30 days prior written notice to the other of intent to terminate
  without cause. The parties shall deal with each other in good faith during the
  30-day period after any notice of intent to terminate without cause has been
  given. 

12. Termination With Cause:

With reasonable cause, either party may terminate this
  agreement effective immediately upon giving of written notice of termination
  for cause. Reasonable cause shall include a material violation of this
  Agreement or any act exposing the other party to liability to others for
  personal injury or property damage. 

13. Non-waiver: 

The failure of either party to exercise any of its rights
  under this agreement for a breach thereof shall not be deemed to be a waiver
  of such rights or a waiver of any subsequent breach. 

14. No Authority to Bind Metallica:

IC has no authority to enter into contracts or agreements on behalf of
  Metallica. This Agreement does not create a partnership between the parties. 

15. Declaration by Independent Contractor.

IC has complied with all Federal, state and local laws
  regarding business permits, certificates and licenses that may be required to
  carry out the work to be performed under this Agreement. 

16. How Notices Shall be Given:

Any notice given in connection with this agreement shall be
  given in writing and shall be delivered by hand to the party or by certified
  mail, return receipt requested, to the party at the party's address stated
  herein. Any party may change its address stated herein by giving notice of the
  change in accordance with this paragraph. 

17. Choice of Law: 

Any dispute under this agreement or related to this agreement shall be
  decided in accordance with the laws of the State of Colorado. 

18. Entire Agreement: 

This is the entire agreement of the parties. 

19. Severability: 

If any part of this Agreement is held unenforceable, the rest of this
  Agreement will nevertheless remain in full force and effect. 

20. Confidential Information: 

IC shall not at any time during the term of this Agreement,
  or at any time thereafter, use or disclose proprietary information of
  Metallica or any of its affiliates, without the written authorization of
  Metallica. Affiliates of Metallica are as follows: 

	
    Metallica Resources Inc.

	
    Metallica Barbados Inc.

	
    Minera Metallica Ltda.

	
    Minera San Xavier S.A. de C.V.

	
    MMM Exploraciones S.A. de C.V.

	
    Datawave Sciences Inc.

	
    De Re Holdings Inc.

	
    Servicios del Plata y Oro, S.A. de C.V.

	
    Raleigh Mining International Limited

21. Amendments: 

This Agreement may be supplemented, amended or revised only in writing by
  agreement of the parties. 

  Metallica Management Inc. 

	
     
	 
	
    /s/ Richard J. Hall
	Date: March 29, 2006
	
    Richard J. Hall
	 
	
    President and Chief Executive Officer
	 
	
     
	 
	
     
	 
	
     
	 
	
     
	 
	
    /s/ Robert Martinez
	Date: March 8, 2006
	
    Robert Martinez
	 
	
    Independent ContractorMetallica Resources Inc.: Exhibit 4.23 - Prepared by TNT Filings Inc.

 

	 	Exhibit 4.23
	May 12, 2004	 

	 	 
	BY: Facsimile
    and Overnight Mail	 
	 	 
	Don Hulse	Fred H. Lightner
	Mine Manager	Sr. Vice
    President and
	Minera San
    Xavier, S.A. de C.V.	Chief Operating
    Officer
	Camino Cerro San
    Pedro	Metallica
    Resources, Inc.
	Km. 3+870, no 200
    C.P. 78440	12200 E.
    Briarwood Avenue
	Cerro de San
    Pedro, SLP	Suite 165
	Mexico	Centennial,
    Colorado 80112
	 	U.S.A.

Re:     Mining Contract between Minera
San Xavier, S.A. de C.V. ("MSX") and Washington Group Latin America, Inc. ("WGLA")
for the Cerro San Pedro Project (the "Project") 

Dear Don and Fred: 

As of the date of this letter, WGLA has performed all of the
work under the Mining Contract that it is capable of performing given MSX's
inability to obtain the blasting permit, the Agrarian Court's recent decision
nullifying MSX's Lease Agreement for the Project site, the San Pedro
Municipality's decision to revoke certain environmental authorizations and the
current uncertainty regarding the future of the Project. Therefore, until such
time when MSX notifies WGLA in writing that MSX has secured the blasting permit
and authorizes WGLA to commence the work contemplated by the Mining Contract
WGLA will cease to perform any further work under the Mining Contract. 

WGLA remains committed to assisting MSX make the Project
successful. In that regard, WGLA is providing the enclosed information as the
basis for a mutually agreed upon course of action for the parties to follow
until the earlier of (a) the date on which MSX notifies WGLA that MSX has
received the blasting permit and authorizes WGLA to commence work under the
Mining Contract and (b) 90 days from the date of this letter (the "Standby
Term"). In addition, as consideration for WGLA remaining at the Project site,
WGLA is requesting that MSX execute the enclosed Indemnification Agreement.

Based on a total equipment value of $4,576,223.00, the return
on capital employed ("ROCE") on the equipment currently located at the Project
site is $76,270.00 per month. During the Standby Term, WGLA will maintain the
equipment currently at the Project for a monthly payment of $76,270.00. WGLA
will also not bring any additional equipment into Mexico unless authorized to do
so by MSX. 

	
    A Subsidiary of: Washington
    Group International
	
    Calle Benito
    Juarez #23 Int. 2. - Portales Oriente 
    - Del Benito - Juarez 
    - Mexico

WGLA's monthly current G&A costs are $34,640.
Please note that the G&A costs do not include the direct labor costs being paid
by WGLA to Servicio de Plata y Oro S.A. ("SPO"), which will be treated
separately under the WGLA/SPO contract. 

Based on a monthly equipment cost of
$76,270.00 and G &A cost of $34,640, WGLA will maintain equipment and personnel
at the Project during the Standby Term for $110,910 a month plus any SPO labor
costs. If accepted by MSX, WGLA agrees to continue under this cost structure
until the end of the Standby Term. If MSX notifies WGLA to commence work within
120 days of the date of this letter, MSX agrees to renegotiate the Mining
Schedule and Target Pricing provisions of the Mining Contract in order to
overcome the effects of the delay and any increased costs of performance
resulting from WGLA's inability to continue work during the Standby Term. 

If after 120 days MSX has still not secured
the blasting permit and MSX has not instructed WGLA to commence work, WGLA
proposes that the parties meet again to mutually agree on a course of action.
Possible courses of action include the ability of either party to immediately
terminate the Mining Contract, continue under the current or a similar payment
schedule, or demobilization of the equipment. Estimated demobilization cost plus
the IVA loss would be $1,093,285. 

This letter is intended to amend and
supplement the Mining Contract. Except as described in this letter, all other
terms and conditions of the Mining Contract shall continue on full force and
effect. Please be advised that by presenting this proposal, WGLA is not waiving
any of its other rights or remedies under the Mining Contract at law or in
equity. 

We hope that the proposal outlined in this
letter will enable you to minimize costs and retain equipment and personnel at
the Project site while continuing to pursue the blasting permit. Please sign
where indicated below to confirm your acceptance of this letter. In addition,
please sign the enclosed Indemnification Agreement and return an original to me
along with an originally executed copy of this letter. 

Sincerely, 

/s/ LeRoy E. Wilkes 

      LeRoy E. Wilkes 

      Executive Vice President President, 

      Mining Business Unit 

Washington Group International, Inc. 

Attorney-in-Fact, Washington Group 

Latin America, Inc. 

ACCEPTED AND AGREED 

this 16 day of June, 2004. 

	
    A Subsidiary of: Washington
    Group International
	
    Calle Benito Juarez #23 Int. 2. -
    Portales Oriente - Del Benito - Juarez
    - Mexico

By:     /s/ Fred H. Lightner 

Name:      Fred H. Lightner 

Title         Sr. V.P. & COO 

Enclosures: 

  -
  List of WGLA's equipment located at the Project site, which includes the fair
  market value of each piece of equipment 

  -
  Table of WGLA's G&A costs 

  -
  Indemnification Agreement 

cc:     Curt Cooley 

          Christy Crase 

 

 

 

 

 

	
    A Subsidiary of: Washington
    Group International
	
    Calle Benito Juarez #23 Int. 2. -
    Portales Oriente - Del Benito - Juarez
    - Mexico

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