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The company said the surface mine's construction, which begins immediately, will include a 242,000-cubic-yard heap leach pad and a double-lined pregnant solution pond with a capacity of over 4.1 million gallons.
It is hoping to begin active gold production quickly after the completion of construction, and recover an estimated 26,000-50,000 ounces of gold with an overall potential of between 1 and 1.5Moz. It will also be targeting silver and copper production.
It did not disclose a target mining start date.
Tombstone is developing the new project in partnership with Goldrock Resources; their joint venture is called Bonanza Mining.
