Silver Wheaton Corp.
TSX : SLW
AMEX : SLW

Silver Wheaton Corp.

March 31, 2006 17:51 ET

Silver Wheaton and Goldcorp Complete Amended Luismin Contract

VANCOUVER, BRITISH COLUMBIA--(CCNMatthews - March 31, 2006) - Silver Wheaton Corp. ("Silver Wheaton") (TSX:SLW)(AMEX:SLW) is pleased to announce that it has completed the previously announced amendment of the Luismin silver contract effective March, 30, 2006. Goldcorp Inc. ("Goldcorp") and Silver Wheaton have amended the original silver purchase agreement, increasing the minimum number of ounces of silver to be delivered over the 25 year contract period by 100 million ounces, to 220 million ounces, and waiving any capital expenditure contributions previously required to be paid by Silver Wheaton. In consideration for these amendments, Silver Wheaton has issued to Goldcorp 18 million common shares and a US$20 million Promissory Note, increasing Goldcorp's ownership to 126 million common shares of Silver Wheaton, or 62% of the outstanding shares. The total consideration of US$150 million is equal to the approximate value of Silver Wheaton's share of the future capital expenditures estimated over the remaining life of the original agreement.

Production of silver at the Luismin mines, which in 2005 approximated 8 million ounces, is expected to average approximately 9.5 million ounces for 2006, 2007 and 2008, increasing to 13 million ounces per annum thereafter. As of December 31, 2005, the Luismin mines had proven and probable reserves of 45.4 million ounces of silver, measured and indicated resources of 1.7 million ounces of silver and inferred resources of 188.4 million ounces of silver.

Randy Smallwood, P. Eng., Vice President, Corporate Development of Silver Wheaton is the "qualified person" as defined in National Instrument 43-101 who has reviewed the proposed expansion of ore production at the San Dimas mine and has reviewed and approved of the contents of this news release.

Silver Wheaton is the only public mining company with 100% of its revenue from silver production. The Company expects to have annual silver sales of 15 million ounces in 2006, increasing to 20 million ounces by 2009 and thereafter. Silver Wheaton is unhedged and well positioned for further growth.

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

This news release contains "forward-looking statements" within the meaning of the United States Private Securities Litigation Reform Act of 1995 and applicable Canadian securities legislation. Forward-looking statements include, but are not limited to, statements with respect to the future price of silver, the estimation of mineral reserves and resources, the realization of mineral reserve estimates, the timing and amount of estimated future production, costs of production, reserve determination and reserve conversion rates. Generally, these forward-looking statements can be identified by the use of forward-looking terminology such as "plans", "expects" or "does not expect", "is expected", "budget", "scheduled", "estimates", "forecasts", "intends", "anticipates" or "does not anticipate", or "believes", or variations of such words and phrases or state that certain actions, events or results "may", "could", "would", "might" or "will be taken", "occur" or "be achieved". Forward-looking statements are subject to known and unknown risks, uncertainties and other factors that may cause the actual results, level of activity, performance or achievements of Silver Wheaton to be materially different from those expressed or implied by such forward-looking statements, including but not limited to: risks related to the integration of acquisitions, the absence of control over mining operations from which Silver Wheaton purchases silver and risks related to these mining operations, including risks related to international operations, actual results of current exploration activities, actual results of current reclamation activities, conclusions of economic evaluations, changes in project parameters as plans continue to be refined, as well as those factors discussed in the section entitled "Description of the Business - Risk Factors" in Silver Wheaton's annual information form for the year ended December 31, 2005 incorporated by reference into Silver Wheaton's Form 40-F on file with the U.S. Securities and Exchange Commission in Washington, D.C. Although Silver Wheaton has attempted to identify important factors that could cause actual results to differ materially from those contained in forward-looking statements, there may be other factors that cause results not to be as anticipated, estimated or intended. There can be no assurance that such statements will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly, readers should not place undue reliance on forward-looking statements. Silver Wheaton does not undertake to update any forward-looking statements that are incorporated by reference herein, except in accordance with applicable securities laws.

Cautionary Language Regarding Reserves and Resources

Readers are advised that National Instrument 43-101 of the Canadian Securities Administrators requires that each category of mineral reserves and mineral resources be reported separately. Readers should refer to the annual information form of Silver Wheaton for the year ended December 31, 2005 and other continuous disclosure documents filed by Silver Wheaton since January 1, 2005 available at www.sedar.com, for this detailed information, which is subject to the qualifications and notes set forth therein.

Cautionary Note to United States Investors Concerning Estimates of Measured, Indicated and Inferred Resources: This news release uses the terms "Measured", "Indicated" and "Inferred" Resources. United States investors are advised that while such terms are recognized and required by Canadian regulations, the United States Securities and Exchange Commission does not recognize them. "Inferred Mineral Resources" have a great amount of uncertainty as to their existence, and as to their economic and legal feasibility. It cannot be assumed that all or any part of an Inferred Mineral Resource will ever be upgraded to a higher category. Under Canadian rules, estimates of Inferred Mineral Resources may not form the basis of feasibility or other economic studies. United States investors are cautioned not to assume that all or any part of Measured or Indicated Mineral Resources will ever be converted into Mineral Reserves. United States investors are also cautioned not to assume that all or any part of an Inferred Mineral Resource exists, or is economically or legally mineable.


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