In early 2012, SIRG hired Paul C. Rizzo Assoc. to

In early 2012, SIRG hired Paul C. Rizzo & Assoc. to evaluate the mine, prepare a new MPO and navigate the permitting process through the BLM office in Kingman. A new heap leach pad and pond were designed by them.

Paul C. Rizzo Associates, Inc. (RIZZO) is an award-winning, highly focused firm specializing in all aspects of the civil engineering and earth sciences fields for the dams, nuclear power plants, and tunneling markets. For over a quarter century our firm has worked around the world on unique, challenging, and technically demanding projects. We take pride in our commitment to providing personal and professional services in a responsive, high quality manner, and continually strive to exceed our clients’ expectations by providing innovative and economically smart solutions.

RIZZO engineers and scientists have decades of experience providing engineering, design, and construction oversight services to the mining industry, particularly in South America.  Our client list includes some of the largest global mining firms operating around the world.  We service the mining industry through a particular emphasis on geotechnical, geophysical, hydrogeological, environmental, and seismic analyses and studies.  Our projects in the mining industry have included underground mining and tunnels, open pit mining, and tailings dams.

Through hydrological, hydrogeological, and geophysical characterization studies, RIZZO engineers and scientists are also able to determine the optimal management of water resources, which is required for production operations and community activities.  Simulating hydrological behavior allows the identification of eventual contaminant migration, determines contaminant concentration, establishes response times available for mitigation measures, and defines environmental impacts.

http://www.rizzoassoc.com/cms/

They visited the site for a hands-on evaluation and reviewed the previous reports, including the seismic survey done by Arimetco. All the core drilling samples are stored at the mine and available for examination.

Their conclusion is:

The reserves are higher than previously estimated. The existing ore below the current bench levels from 3695 to 3420 values known between 3420 and 3310 could add another 13M lbs. Many holes were abandoned with higher than cut-off grade Cu values in and around the existing pit. Their continuation at depth could prove additional resources.

Based on the forgoing, it is safe to assume that the current known resources would provide a minimum of 50M lbs of ore ; at 5Mlbs/annum, that would support a 10 year mine life.