Document:

Exploitation Agreement dated April 23, 2004

 Exhibit 10.16 
  
 EXPLOITATION AGREEMENT ENTERED INTO BY AND BETWEEN MR. MARTIN BERNARDO SUTTI COURTADE (HEREIN AFTER “TAE GRANTOR”), AND THE
CORPORATION STERLING MINING DE MEXICO, -S.A. DE C.V., REPRESENTED BY ITS REPRESENTATIVE RAYMOND KUMLER DE MOTTE, (HEREIN AFTER “THE BENEFICIARY”); HAVING BOTH PARTIES TO OBSERVE THE FOLLOWING DECLARATIONS AND CLAUSES: 
  
 DECLARATIONS: 
  

	I.	The GRANTOR declares that: 

  

	I.1.	Personality. He declares that his name is Martin Bernardo Sutti Courtade, who is citizen of the Mexican United States. That he is entitled to enter into this agreement, due
to the fact that he has the legal capacity to do so, as well as the will to be undertaken in the terms here set forth. 

  

	I.2.	Property of the Track of land in which the Tailings, object of this Agreement, are located. Within the track of land known as “Parcela 71/ZAP/1”, which has an
extension of 40-00-00 hectares; GRANTOR is providing all tailings located within its track of land to the BENEFICIARY and it is estimated that are approximately 5 million tons of tails. 

  
 As shown in Declaration 3 of the Lease Agreement [which this agreement is
part of] entered into by and between Mr. Martin Bernardo Sutti Courtade and Sterling Mining de Mexico, S.A. de C.V., the real estate property where the tailings are located is the property of Mr. Sutti. The previous is credited through the
public document 13,361, granted by Mr. Tarsicio Felix Serrano, Notary Public 7 of the Estate of Zacatecas, on January 31st, 2004. 
  

	I.3.	Recital. He declares that it is his will to give the tailings described above, aim of this agreement, to the BENEFICIARY with the only purpose, as a specialist, to
give them the appropriate treatment to obtain byproducts. 

  

	I.4.	The GRANTOR acknowledges that the tailings, facility, processing; and other activities necessary to extract the by-product have been fully approved by the appropriate
authorities and no outstanding issues remain and that full exploitation of the tailings process can occur as anticipated by the BENEFICIARY. The GRANTOR further acknowledges that the tailings are not considered hazardous waste and
subject to regulatory requirements beyond considered standard for processing in Mexico (solid waste). 

  

	I.5.	Domicile. For the effects of this Agreement their domicile will be the one located in Paseo de Bernardez 74 -B, Fraccionamiento Zacatecas, City of Zacatecas, and Z. C. 98610.

 II.- The BENEFICIARY declares that: 
  

	II.1.	Personality. It is an enterprise constituted according to the Mexican Law and that it is properly authorized to commercially operate in the Mexican United States. The
previous is credited through the public document No. 31,286 dated February, 27, 2004. Witnessed and recorded by Mr. Juan Antonio Castaneda Ruiz, Notary Public No. 10 in Zacatecas; the referenced document is pending of inscription in
the Public Registry of commerce. 

  

	II.2.	Representation. It is legally represented by Mr. Raymond Kumler De Motte in the terms of the power of attorney contained in the public deed 31,286 dated February, 27,
2004, Witnessed and recorded by Mr. Juan Antonio Castaneda Ruiz, Notary Public No. 10 in Zacatecas; the : reference document is pending of inscription in the Public Registry of commerce., in said power sufficient faculties for the
subscription of the present Agreement were granted, and the same faculties have not been revoked nor modified to the date of execution of same. 

  

	II.3.	Tailings Property. It is their will to celebrate the present Agreement as the BENEFICIARY, regarding all the tailings associated with the property, estimated at
approximately 5 million tons of tailings, to be treated and to exploit them, in order to obtain byproducts. 

  

	II.4.	Consent with the Tailings condition. It knows the current condition and characteristics of the Tailings, and hence, it receives them [to-be treated] as to its entire
satisfaction. 

  

	II.5.	For the effects of this Agreement their domicile will be the one located in Paseo de Bernardez 74 -B, Fraccionamiento Zacatecas, City of Zacatecas, and Z. C. 98610.

  

	III.	Both Parties Declare That: 

  
 The terns used in capital letters will have the meaning attributed to them in the present Agreement. Such terms may be used in plural or singular, without this meaning
that they have a different significance within the Agreement. Likewise, the parties agree that any other terms used in capital letters, and that are not expressly defined in the present Agreement, will have the meaning attributed to them in the
different applicable law. 
  

			
	EXPLOITATION:	  	Activities to be carried out by the BENEFICIARY, in order to obtain byproducts of the tailings the subject of this agreement.
		
	TAILING	  	 Solid wastes that have been generated during the primary op
 eration of division and concentration of minerals.

  

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	ROYALTY:	  	According to article 15-B of the Federal Civil Code of Mexico, royalties are defined as the payments made for the use that a person gives to an other of defined goods, or others [includes
rights] with similar characteristics, such as the exploitation of Tailings.
		
	Net Smelter Return (“NSR”):	  	Is defined as the gross received by founding, refining or other buyers as a result of the- selling of minerals,. metals (includes bars and bricks), mineral substances or concentrates provided by mining shares, -after being deducted, from said gross, the following charges, if same have not been deducted by the buyer when calculating the following
payments:
		
	 	  	 •      Founding and refining charges;
  
 •      Penalties;
  
 •      Costs of arbitration and/or third party intervention;
  
 •      Costs of commercialization;
  
 •      Insurance
of said minerals metals and/or concentrates
  
 •      Custom taxes;
  
 •      Royalties, taxes or rights over mining or other similar charges imposed by the State, as well as: ad valorem, exportation and importation taxes.

		
	NET PROFIT:	  	Means the net returns received by the BENEFICIARY from products produced from the property, together with any other revenue from the property, if any, less all current operating expenses
or costs.
		
	NET RETURN:	  	Means the amount of money or other proceeds received from the sales of ore concentrates, sponge, bullion, or any other form in which minerals or materials (metallic or non-metallic) are produced
from the property after deduction of all treatment charges, penalties, costs of ore in transit, smelter charges, transportation costs or other charges make by a purchaser of the products and all umpire charges which the BENEFICIARY may be
required to pay.
		
	SITE:	  	The track of land identified as Parcel A “71/ZAP/1” and in which the tailings are located.

  
 As the preceding is declared, the
parties enter into the present Agreement according to-the following: 
  

 3 

 CLAUSES 
  
 AIM OF THE AGREEMENT 
  
 FIRST: The GRANTOR gives to the BENEFICIARY the right to obtain byproducts of the exploitation of an approximate amount of 5 million tons of
tailings that are located in a track of land, property of the GRANTOR, as set forth in Declaration 1.2 of this agreement. 
  
 PROPERTY OF THE TAILINGS 
  
 SECOND: In accordance to article 202 of the Civil Code for the State of Zacatecas, the tailings are property of the GRANTOR who, in any case, shifts the
property of same to the BENEFICIARY; as a consequence, the only thing that the first gives to the second is the right to treat the materials of reference to obtain byproducts. 
  
 COMPENSATION 
  
 THIRD: As a consequence of the right of exploitation, the BENEFICIARY will pay to the GRANTOR; a first payment of $25,000 Us Cy (said amount
has already been made on January 21 2004). Payments of 50% of net profits up to a value of $4,550,000.00 Us Cy will be made to the GRANTOR with the issuance of shares of Sterling Mining Company, a US company, based on a value of
$10 Us Cy per share. The shares of reference will be restricted in accordance with the Securities and Exchange Commission Rule 144 or. Regulation S as applicable and will be issued on a quarterly basis. Martin Sutti will be required to execute a stock subscription agreement for said shares: 
  
 Once the threshold of $4,550,000.00 Us Cy has been met, the BENEFICIARY will pay the GRANTOR a NSR of .for the duration
of this agreement. 
  
 PAYMENT PROCEDURE 
  
 FOURTH: The NSR will be calculated on a quarterly basis. In the case of a
difference of opinion as to the reasonable interpretation of costs, or definition of Net Profits, both parties agree to resolve such differences in good faith. 
  

DATE AND PLACE OF PAYMENT 
  
 FIFTH: The payment shall take place in the domicile of the GRANTOR. Such address is precise in declaration 1.5 of the chapter on declaration of this
agreement, or through electronic transfer into the account of the GRANTOR. 
  
 SIXTH: Payments shall be made according to the period established within Clause Fourth of this agreement; therefore the expenditures of payment shall be made in quarterly periods, during the fifteen days of the corresponding month of
payment. 
  

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 TAILINGS TREATMENT PROCEDURE 
  
 SEVENTH: In accordance with the Environmental Impact Authorization, granted by the Ministry of Environment and Natural Resources, the
allowed procedures to cant’ out the tailing treatment know as lixiviation through sodium hyposulphite. 
  
 This precision is made with the only purpose of determining that, with the authorized treatment, in any case exists a transmission of property, due to the fact that, through the lixiviation process, a part of the
tailing remains and the other, the one which contains silver forms a byproduct The part of tailing that remains will continue in property of the GRANTOR while the byproducts will be commercialized by the BENEFICIARY. 
  
 ENVIRONMENTAL RESPONSIBILITY 
  
 EIGHT: In accordance with article 151 of the General Law of Ecological Equilibrium
and Protection of the Environment, the GRANTOR is responsible for the generation of the tailings, while the BENEFICIARY is from the activities of treatment of those. In case of an accident or an accident, both will share the
responsibility in terms of the previously mentioned article. 
  
 Notwithstanding
the above mentioned, in terms of article 134, Section V of the General Law of Ecological Equilibrium and Protection of the Environment, the GRANTOR will be responsible for the remediation of soil when finishing the present agreement.
BENEFICIARY will only be responsible for the contamination that was caused by its activities during the term of this agreement. 
  
 SAFETY AND ENVIRONMENTAL CONSERVATION 
  
 NINTH: Both, GRANTOR and BENEFICIARY will be obliged to give full compliance with the local, municipal and federal legal dispositions regarding
safety and hygiene and environmental pollution prevention. 
  
 During the
operation process (treatment of tailings), the BENEFICIARY will be responsible for the management of the wastes generated within its activities; likewise, the GRANTOR will give full compliance to its obligations as a generator of
hazardous wastes. This obligation extends to the process of soil remediation when, at the end of this agreement the GRANTOR decides whether or not sell the track of land referred within declaration 1.2, of this agreement. 
  
 OBLIGATIONS IN CHARGE OF THE BENEFICIARY 
  
 TENTH: The BENEFICIARY is obliged to:

  

	a)	Carry out the tailing treatment set forth in Clause Eight of the present Agreement; 

  

	b)	Comply with the dispositions regarding tailings management, as well as to give full compliance to the legal dispositions regarding land use; 

  

	c)	Maintain in full force and effect all the permits required by the competent authorities for the development of its activities; 

  

 5 

 BREACH 
  
 ELEVENTH: In case of violation or breach to any of the clauses of the present Agreement, the complying party will notify its unconformity to the other party.

  
 If the causes that motivation the claim subsist, the above-mentioned
notification will be done again in written ten days following the date in which the first notification was made. 
  
 In the event that the party responsible for the violation or breach of any of the clauses of this Agreement does not take the necessary and sufficient corrective measures
within the five days following the second- notification and, if the causes that created the claim continue, the
affected party will be able to demand from the other party the mandatory compliance or the rescission of the Agreement and the payment of the direct damages proved in each case. 
  
 RESCISSION CAUSES 
  
 TWELFTH: The following will be cause for the rescission of the present Agreement: 
  

	a)	If the BENEFICIARY: 

  

	i.	Does not pay the corresponding benefits during two consecutive periods; 

  

	ii.	Gives different treatment to the tailings in contravention to this agreement and authorizations regarding Environmental Matters; 

  

	iii.	Does not comply with any of the aspects established in the present Agreement; 

  

	iv.	Overall, the breach of any of its obligations derived from the present Agreement. 

  

	b)	If the GRANTOR impedes in any manner the use of the site and the treatment of the tailings by the BENEFICIARY for the purposes established in the Agreement present

  

	c)	If because of acts of nature or force major the treatment of tailings becomes impossible. 

  
 The breach of any of the obligations derived from the present Agreement , as well as the realization of any of the circumstances described
above, will give the right to the complying party to rescind the present agreement without a prior judicial resolution; as well as to receive the payment of the corresponding damages, by means of a written notice filed in the domicile appointed in
this Agreement by each of the Parties. In case of rescission for the noncompliance of the BENEFICIARY, it must stop treating the failings and deliver the material and legal possession of same to the GRANTOR in a 60 day term following
such a requirement. 
  

 6 

 EARLY TERMINATION 
  

THIRTEENTH: In the event that the Parties agree to early terminate this Agreement, or if at the expiration of same decide not to renew it, the Parties will
proceed with respect to the deliverance of the applicable notice of termination; the BENEFICIARY shall deliver to the GRANTOR the possession of the tailings. 
  
 DAMAGES 
  
 FOURTEENTH: The BENEFICIARY is solely responsible for the damages that are caused to third parties, derived directly from the tailings treatment.

  
 DURATION 
  
 FIFTEENTH: The Agreement hereunder will be in full force and effect upon being signed
and until the whole tailings have been treated, 2004. The duration can be extended whenever the parties so agree. 
  
 TAXES AND GOVERNMENT FEES 
  
 SIXTEENTH: The parties to the Exploitation Agreement hereunder will be responsible for the taxes and government fees that may arise from said Agreement in a
proportional manner, and according to that which is established applicable law by the applicable law. 
  
 BYLAW OR DOMICILE MODIFICATIONS 
  
 SEVENTEENTH: The parties hereby agree that in the event that any of them disappear, change names, file bankruptcy or change address, said actions must be notified to- the counterpart in writing, within a period of time that must not
exceed fifteen days before the event takes place, in order to solve and make any decisions in relation to the agreement hereunder. 
  
 ASSIGNABILITY 
  
 EIGHTEENTH: In the event that Sterling Mining Company de Mexico is acquired or merged, the BENEFICIARY can assign this lease agreement to the surviving entity without the GRANTOR’s consent.

  
 GOVERNING LAW 
  
 NINTEENTH: The parties hereby expressly agree to resolve any disputes arising out of
or relating to this Agreement before the ministry, even “when said dispute is related to the rescission of the Agreement, hereby binding them to accept whatever resolution is issued by the aforementioned authority. 
  
 If any conflict, the parties expressly agree to be subject, to the competent Tribunals of the
City of Zacatecas, Zacatecas, and hereby waiver any present or future right to any other forum, derived from domicile, nationality or any other cause. 
  

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 Having both parties learned of the full content and legal effects of the Agreement hereunder, and having both parties
stated that there is no wilful deceit, misleading, error, nor has any party been forced in a violent manner, nor has consent been affected in any other way that may harm the validity of the Agreement hereunder, and once they have read the Agreement
hereunder, they ratify and sign the present Agreement in duplicate in Zacatecas, Zacatecas, on April 23, 2004. 
  

									
	 THE GRANTOR
	 	 	 	THE BENEFICIARY
					
	 s/s
	 	 	 	 	 	 s/s
	 	 
	 	 	MARTIN BERNARDO SUTTI	 	 	 	 	 	RAYMOND KUMLER DEMOTTE
	 	 	COURTADE	 	 	 	 	 	 

  

 8 

 AMENDMENT NO. 1 
 to the 
 EXPLOITATION AGREEMENT 
  
 This Amendment is being issued to correct inconsistencies in the original “EXPLOITATION AGREEMENT” (“Agreement”), which
was executed by both parties April 23, 2004. 
  
 The following corrected
sections replace, in their entirety, the same sections in the original Agreement All other sections remain intact: 
  
 EARLY TERMINATION 
  
 THIRTEENTH: In the event that the Parties agree to early terminate this Agreement, the Parties will proceed with respect to the deliverance of the applicable
notice of termination; the BENEFICIARY shall deliver the GRANTOR the possession of the tailings. 
  
 DURATION 
  
 FIFTEENTH: The
Agreement hereunder will be in full force and effect upon being signed. The tern of the Agreement is twenty (20) years from the effective date as expressed in the Nineteenth Section, At any time prior to the end )f the expiration of the term, either Party may request negotiations to extend the term. 
  
 This amendment is signed and effective on 7th day of May,
2004. 
  

									
	 THE GRANTOR
	 	 	 	THE BENEFICIARY
					
	 s/s
	 	 	 	 	 	 s/s
	 	 
	 	 	MARTIN BERNARDO SUTTI	 	 	 	 	 	RAYMOND KUMLER DEMOTTE
	 	 	COURTADELetter of Intention dated May 19, 2004

 Exhibit 10.17 
  
 Letter of Intention entered by and between MINERA SAN ACACIO, S.A. DE C.V., AMADO MESTA HOWARD with MARTIN BERNARDO SUTTI COURTADE and/or
STERLING MINING DE MEXICO, S.A. DE C.V. In this act, Mr. AMADO MESTA HOWARD is acting by his own and as the legal representative of MINERA SAN ACACIO, S.A. DE C.V. with the purpose of lending (with option to purchase) the mining concessions
listed within Attachment A to MARTIN BERNARDO SUTTI COURTADE and/or to STERLING MINING DE MEXICO, S.A. DE C.V. The present act has the following: 
  
 CONDITIONS 
  
 The final contract will have a minimum term of five years. Once said period has expired they (MARTIN BERNARDO SUTTI and/or STERLING MINING DE MEXICO, S.A. DE C.V.), might
exercise the purchasing option of the mining concessions in an amount of $3’500,000 Us Cy. 
  
 Once the final contract has been signed, before a Notary Public, the LESSEE will pay to the LESSOR an amount of $150,000.00 Us Cy. The signature of reference, must be made within a period that will not go beyond 90
days as to the date of signature of this Letter of Intention. 
  
 The LESSEE will
pay to the LESSOR a royalty; said payment will be estimated in relation with the production of silver and gold (will be denominated NSR) attending to the following conditions: 
  
 PERCENTAGES TO BE PAID IN CONNECTION WITH THE SILVER OUNCE TROY PRICES 
  

			
	 Royalty

	  	 OUNCE TROY PRICES

	2.5%	  	To $5.00 Us Cy/Silver Ounce Troy
		
	3.5%	  	More the $5.00 Us Cy/Silver Ounce Troy to $5.50 us cy/Silver Ounce Troy
		
	3.75%	  	More the $5.50 Us/Silver Ounce Troy to $6.50 Us/Silver Ounce Troy
		
	4.0%	  	More than $6.50 Us Sy/Silver Ounce Troy
		
	4.25%	  	More than $7.50 Us Cy/Silver Ounce Troy to $10.00 Us Cy/Ounce Troy
		
	5.0%	  	More than $10.00 Us Cy/Silver Ounce Troy

  
 PAYMENT OF ROYALTIES: Royalties for
different minerals of 2.5%, royalty must be paid over the base of income obtained from the lending in each calendar quarter. To each payment, a balance in which NSR is reflected must be attached. 
  
 The LESSEE will pay a minimum annual royalty of $150,000.00
Us Cy. 

 Within a brief period of time, The LESSOR bounds him self to give to the LESSEE; the whole technical and legal
documentation regarding the mines. 
  
 The LESSOR will be responsible of paying
the right over the mines, as well as the concessions, in the other hand the LESSEE will refund to the LESSOR, the payments done by him during the extent of this agreement. 
  
 The LESSEE is bound to carry out works [in the mines] in a minimum amount of $100,000.00 Us Cy each year, as well as to give to the LESSOR
within the first month of each year, the technical and economical information, as well as to allowed him to carry out a technical and accountable verification to the work papers [of the mines of reference], in order to help him to shown, to the
mining authorities, the fulfillment of the obligations imposed by the Mexican Mining Law. 
  
 The LESSEE will have the right to work and dispose the obtained minerals form the cuts known as Cut Alamden and Carolina. It is important to point out that any work shall be interrupted when the LESSOR demand it,
trough a written notification made within the 15 days, prior to the date of termination. 
  
 BREACH OF CONTRACT: In the case that one of the parties breach one ore more obligations set forth herein, the affected party will notified to the other party (in a written way) those obligations that have been
unfulfilled. If during the following, 30 days to the written notification, the defendant has not fulfill the causes of breach, the plaintiff will have the right to rescind the contract trough a simple written notification, notwithstanding that the
payment. of damages might be claimed. 
  
 At this date MARTIN BERANRDO SUTTI
COURTADE is paying a check in an amount of $10,000.00 Us Cy, which shall be deduced form the initial payment of $150,000.00 Us Cy that must be paid within the day of ratification. 
  
 Signed in Zacatecas City 
 May 19th, 2004. 
  

 2

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