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Press release from Marketwire

Silver Standard Reports San Luis Feasibility Study

Monday, May 10, 2010

Silver Standard Reports San Luis Feasibility Study22:16 EDT Monday, May 10, 2010VANCOUVER, BRITISH COLUMBIA--(Marketwire - May 10, 2010) - Silver Standard Resources Inc. (TSX:SSO)(NASDAQ:SSRI) is pleased to report the approval of the San Luis Feasibility Study for submission to the San Luis joint venture by its board of directors. The Feasibility Study estimates an internal rate of return of 26.5% and a net present value discounted at 5% of $39.2 million at base case prices of $800/ounce gold and $12.50/ounce silver. Capital expenditures are estimated to be US$90.4 million (+/- 15%) for a 400 tonne/day underground mine with average annual production of 78,000 ounces of gold and 1.86 million ounces of silver over its 3.5 year mine life.The San Luis Project, located in Ancash, Peru, is owned by Reliant Ventures S.A.C., a joint venture of Silver Standard and Esperanza Silver Corporation. Silver Standard is the project operator. With the completion of the Feasibility Study, Silver Standard has now vested a 70% interest in the joint venture.The joint venture will meet to consider and approve the Feasibility Study in no sooner than three months and no later than six months. Silver Standard has 60 days following the approval of the Feasibility Study by the joint venture to elect to increase its interest to 80% by paying all costs to place the project in production.Resources and ReservesResource and reserve grades were derived from a geologic block model provided by Resource Evaluation Inc. (REI) and Resource Modeling Inc. (RMI) in 2009. The block model resource estimate was prepared by independent qualified persons Michael Lechner, P.Geo., of Resource Modeling, Inc. and Donald Earnest, Registered Geologist, of Resource Evaluations, Inc., and used a cut-off grade of 6 g/t gold-equivalent based on a 65:1 gold-silver ratio and metals prices of US$600/troy ounce gold and US$9.25/troy ounce silver.In this resource estimate, measured and indicated resources totaled 484,000 tonnes grading 22.4 grams of gold and 578.1 grams of silver per tonne containing 348,100 ounces of gold and 9,003,300 ounces of silver. (See the Updated Mineral Resource Estimate filed on SEDAR (www.sedar.com) on January 16, 2009.)The following table summarizes the mineral reserves within the block model resource estimate.San Luis Project Mineral Reserve Summary - April 2010(100% basis, based on a cut-off grade of 6.9 grams of gold-equivalent per tonne) ------------------------------------------------------------------------- Gold Grade Silver Grade Contained Contained Material Tonnes (g/t) (g/t) Gold Ounces Silver Ounces ------------------------------------------------------------------------- Proven 56,279 28.26 604.45 51,136 1,093,690 ------------------------------------------------------------------------- Probable 447,034 16.65 426.21 239,348 6,125,745 ------------------------------------------------------------------------- ------------------------------------------------------------------------- Total 503,313 17.95 446.14 290,484 7,219,435 ------------------------------------------------------------------------- The mineral reserves were estimated using higher metal prices of US$800/oz gold and US$12.50/oz silver, metallurgical recoveries of 94.0% for gold and 90.0% for silver and an operating cost of US$160.83 per tonne of ore processed to determine a breakeven cut-off grade for reserves of 6.9 g/t gold-equivalent.The mineral reserve has been determined in accordance with CIM guidelines and only measured and indicated resources as defined in National Instrument 43-101 were used to calculate the proven and probable mineral reserve. The mineral reserve estimates contained in this news release were prepared by Steve L. Milne, P.E., an independent Qualified Person, as defined by NI 43-101, of Milne & Associates, Inc., Tucson, Arizona.Operating and Financial SummariesAs presented in the Feasibility Study, the operating cost for the San Luis Project is estimated at $160.83/tonne of ore processed. The following table summarizes the breakdown of operating costs:Estimated Annual Operating Cost Summary - April 2010 -------------------------------------------------------------------- Average Cost Unit Cost Area (in US$) (in US$/tonne Ore) -------------------------------------------------------------------- Mine 8,613,713 59.00 -------------------------------------------------------------------- Process 8,222,281 56.32 -------------------------------------------------------------------- General & Administration(1) 6,644,496 45.51 -------------------------------------------------------------------- -------------------------------------------------------------------- Total 23,480,490 160.83 -------------------------------------------------------------------- -------------------------------------------------------------------- (1) Estimates provided by Silver Standard. The base case financial summary assumes recovered gold production of 270,031 ounces and silver production of 6,454,810 ounces over the life of the mine:Base Case Financial Summary - April 2010 (in US$ where applicable) -------------------------------------------------------------- Base case gold price $800 -------------------------------------------------------------- Base case silver price $12.50 -------------------------------------------------------------- Cash operating cost per ounce of gold (2) $313. 16 -------------------------------------------------------------- Internal rate of return (IRR) 26.5% -------------------------------------------------------------- Net present value - 0% $57.5 million -------------------------------------------------------------- 5% discount $39.2 million -------------------------------------------------------------- 10% discount $25.6 million -------------------------------------------------------------- (2) Excluding silver credits. Sensitivities - April 2010 --------------------------------------------------------------------------- Gold price Silver Price IRR NPV (US$/oz) (US$/oz) (%) (US$ in millions, 5% discount) --------------------------------------------------------------------------- Base Case 800 12.50 26.5 39.2 million --------------------------------------------------------------------------- 3-year Average 955 14.76 40.2 68.2 million --------------------------------------------------------------------------- Spot 1,170 18.50 58.0 109.1 million --------------------------------------------------------------------------- The following Qualified Persons were relied on for the respective roles in the preparation of the San Luis Feasibility Study: ---------------------------------------------------------------------------- Qualified Person Scope of Responsibility ---------------------------------------------------------------------------- Mike Robb, P.E. General study coordination, review and RR Engineering report preparation ---------------------------------------------------------------------------- Donald Earnest, Registered Mineral resource modeling, estimation Geologist Resource Evaluation, and drilling validation (with RMI) Inc. (REI) ---------------------------------------------------------------------------- Michael Lechner, P.Geo. Mineral resource modeling, estimation Resource Modeling, Inc. (RMI) and drilling validation (with REI) ---------------------------------------------------------------------------- Steve L. Milne, P.E., Mineral reserves and mining section Milne & Associates, Inc. report format and review of mine design, planning, costs, and mineral reserve estimation ---------------------------------------------------------------------------- Chris Kaye, B.Eng. (Chemical) Mill metallurgical testwork management, Mine and Quarry Engineering mineral processing facility design, power Services Inc. generation design, infrastructure cost estimation, project planning and report assembly ---------------------------------------------------------------------------- Clint Strachan, P.E. Review of tailings acid-base accounting MWH Americas, Inc. and characterization testwork, slurry consolidation testing, tailings storage facility (TSF) and water collection facility designs and cost estimate, and TSF conceptual closure planning Geotechnical assessment of ground conditions for project facilities ---------------------------------------------------------------------------- Silver Standard Resources Inc. is a silver mining company that intends to grow through exploration and the development of its project pipeline.Forward Looking Statements: Certain statements in this news release are forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 and forward-looking information within the meaning of Canadian securities laws (collectively, "forward-looking statements"). Forward-looking statements are statements that are not historical facts and that are subject to a variety of risks and uncertainties which could cause actual events or results to differ materially from those reflected in the forward-looking statements. Such risks and uncertainties include, but are not limited to, the timing to complete drilling programs at the Company's exploration projects; differences in U.S. and Canadian practices for reporting mineral resources and reserves; risks and uncertainties relating to the interpretation of drill results and the geology, grade and continuity of our mineral deposits; the Company's ability to raise sufficient capital to fund development; changes in economic conditions or financial markets; uncertainty of production and cost estimates for the San Luis Project; the Company's history of losses and expectation of future losses; changes in prices for the Company's mineral products or increases in input costs; litigation, legislative, environmental and other judicial, regulatory, political and competitive developments in Argentina, Australia, Canada, Chile, Mexico, Peru, the United States and other jurisdictions in which the Company may carry on business; technological and operational difficulties or inability to obtain permits or land use agreements in connection with exploration and development activities; labour relations matters; and changing foreign exchange rates, all of which are described more fully in the Company's most recent Form 20-F and other filings with the Securities and Exchange Commission. The Company does not intend, and does not assume any obligation, to update any forward-looking statements, other than as required by applicable law.Cautionary note to U.S. investors: The terms "measured mineral resource", "indicated mineral resource", and "inferred mineral resource" used in this news release are Canadian geological and mining terms as defined in accordance with National Instrument 43-101, Standards of Disclosure for Mineral Projects ("NI 43-101") under the guidelines set out in the Canadian Institute of Mining, Metallurgy and Petroleum (the "CIM") Standards on Mineral Resources and Mineral Reserves. We advise U.S. investors that while such terms are recognized and permitted under Canadian regulations, the SEC does not recognize them. U.S. investors are cautioned not to assume that any part or all of the mineral deposits in the measured and indicated categories will ever be converted into reserves. "Inferred mineral resources" in particular have a great amount of uncertainty as to their economic 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 generally form the basis of feasibility or other economic studies. U.S. investors are cautioned not to assume that any part or all of an inferred mineral resource exists, or is economically or legally mineable. Disclosure of contained metal expressed in ounces is in compliance with NI 43-101, but does not meet the requirements of Industry Guide 7 of the SEC, which will only accept the disclosure of tonnage and grade estimates for non-reserve mineralization.(Source: Silver Standard Resources Inc.)FOR FURTHER INFORMATION PLEASE CONTACT: Silver Standard Resources Inc. Paul LaFontaine Director, Investor Relations N.A toll-free: (888) 338-0046 or Direct: (604) 484-8212 invest@silverstandard.com www.silverstandard.com