On March 13, 2003, USPR acquired Solidaridad I (175 hectares).
On March 27, 2003, USPR acquired the Solidaridad II (2,162 hectares) exploration concession from the Mexican government.
On July 22, 2003, exploration concessions for Solidaridad III, (294 hectares) and Solidaridad IV (149 hectares) were acquired.
On May 25, 2004, the company received the exploration concession from the Mexican government for Solidaridad V (La Ceiba, 921 hectares).
In February 2006, USPR claimed a gold mine concession lot named "La Sabila" (11,405 hectares) that surrounds the other concessions, bringing the total area under USPR"s control to 15,400 hectares (one hectare equals 2.47 acres).
In 2007, road improvements were made and a warehouse in Morelia was for drill core storage and analysis. Funding was acquired for a more thorough definition drilling campaign.
Drilling began in early 2008.
All legal obligations for the concession have been met and all fees and taxes are current.
A Chief geologist and metallurgist have been hired to continue the exploration and begin ore characterization. In addition, a contract geologist living in Morelia is working on the project full time.
Chemical analysis and metallurgy is being conducted by Mike Floersch of Applied Minerals, Inc.
In September 2008, an Environmental Impact Statement was approved so that a pilot plant for ore processing and deep core drilling can begin.
In October 2009, a metals extraction test was performed on ore samples collected from a vein exposed on the surface.
Fourteen additional holes were drilled in the 2010 drilling campaign.
A 2011 National Instruments 43-101 report was prepared independently by Michael Floersch (Applied Minerals, Inc.) and Betty Gibbs (Gibbs Associates) to describe results of exploratory drilling campaigns (2008 and 2010) and lay the groundwork for continued drilling and resource definition of the La Sabila property in southeastern Michoacán, Mexico.