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January 16, 2013
08:36 EDTANVAllied Nevada Gold provides update on 2012 metallurgical testing programs
Allied Nevada Gold is providing an update on the results of ongoing metallurgical test work conducted in 2012 in support of the Hycroft mill expansion. A comprehensive pilot plant scale program, primarily for the generation of concentrate products for oxidation testing, was completed for Hycroft mill material. The testing simulated our proposed flow sheet of primary crushing, grinding to 150 microns, rougher flotation, leaching to extract the non-refractory silver, pressure oxidation to extract the refractory gold and cyanidation. The results through this flow sheet indicated overall recoveries of approximately 79.7% for gold and 85.5% for silver. These results are an improvement of 1.7% for gold and 0.6% for silver as compared with the recoveries used in the technical report titled "Technical Report - Allied Nevada Gold Corp., Hycroft Mine, Winnemucca, Nevada, USA",. These results assume onsite autoclaving of rougher concentrate and do not account for offsite charges. If two-stage cleaning were included in this flow sheet, which may be done for certain concentrate sales agreements, testing indicated overall recoveries would be approximately 71.1% for gold and 81.0% for silver. The cleaning stage involves "rougher" concentrate reporting to a regrind mill where it is ground to 80% passing 45 microns and passed though cleaning cells to remove additional waste material, reducing the mass. These results are an improvement of 21.1% for gold and 11.5% for silver as compared to recoveries used in the April 2012 Technical Report.
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October 15, 2014
17:35 EDTANVAllied Nevada Gold reports preliminary Q3 gold production 49,630 oz
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17:25 EDTANVAllied Nevada Gold provides summary of Hycroft mill expansion feasibility study
Allied Nevada Gold is pleased to provide a summary of the Hycroft mill expansion feasibility study results, completed by M3 Engineering and Technology in association with the Company. M3 developed the process flow sheet, capital cost estimate, operating cost estimate and financial model, while Allied Nevada developed the heap leach metrics, taxes, mineral reserves and mine plan. The feasibility study assumptions are largely the same as in the prefeasibility study issued in May, and continue to assume a two-phase construction plan for the mill expansion. A summary of the significant changes from prefeasibility to feasibility are highlighted below. Consistent with the prefeasibility study, the base case metal price assumptions of $1,300 per ounce gold and $21.67 per ounce silver have been utilized in the feasibility study. The feasibility is presented on a January 1, 2015, go-forward basis and the comparative prefeasibility results have been adjusted to reflect the same start time. The company intends to file a National Instrument 43-101 Technical Report within the 45-day regulatory timeframe.The capital has increased to $1.39B, up $66M, primarily resulting from the following: the change in construction of two 120kV power lines to one 345kV line to ensure reliable power availability; additional conveyors and crushed ore storage for the crushing/pre-crush and pebble crushing circuits; increased site general costs and confirmation of geotechnical analysis on required earthworks; and increased sizing for the thickener tanks. These increases were partially offset by a decrease in contingency reflecting the improved confidence level of the capital estimate with 88% of the estimated equipment capital costs now associated with vendor quotes.

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