Historical Mining: 1880s to 1910s
Historical mining occured at Florida Mountain from approximately 1883 to 1910. During this period, historical underground mining at Florida Mountain is estimated to have produced a total of 133,000 ounces of high-grade gold and 15.4 million ounces of high-grade silver (Bonnichsen et al. undated, cited in Gierzycki 2004a). Historical records from these mining operations document that stopes were mined at cut-offs of over 15 grams per tonne gold (“g/t”), many of which reported average grades in excess of 30 g/t gold.1
Modern Mining: 1970s to 1990s
More recent mining activity at Florida Mountain began in the 1970s and continued through 1994 when Kinross commenced open-pit mining. Material was mined from three areas near the crest of Florida Mountain - the Tip Top, Stone Cabin, and Blackjack open pits.
The mineralized material from Florida Mountain was proccessed at the DeLamar Mine milling complex 8.5 kilometers from Florida Mountain and connected via an all-weather haul road. Gierzycki (2004) estimated that 124,500 ounces of gold and 2.6 million ounces of silver were produced from Florida Mountain until 1998. In 1998, as a result of low precious metal prices, the Florida Mountain Project, as an extension of the DeLamar Project was placed on care and maintenance. The site of the former open pit as been fully reclaimed and no additional drilling had been conducted on the property.1
1. NI 43-101 Technical Report and Preliminary Feasibility Study for the DeLamar and Florida Mountain Gold – Silver Project, Owyhee County, Idaho, USA. Dated March 22, 2022.