C1 cash cost was positively impacted by the cost associated with stripping in excess of the average life of
mine strip ratio.
- Production is estimated to commence in 2015 with modelled output of 100,000-160,000 ounces of gold per annum and 700,000 - 1,100,000 ounces silver, with an average life of
mine strip ratio of 3.8.
Since 1963, Navajo
Mine strip mine operations have provided coal to the Four Comers Steam Plant, which resulted in the loss of Stanton's type localities and other Bauer fossils.
The average life of
mine strip ratio is 7.6 bcm waste per tonne of ROM coal including pre strip.
It will also enable high volume bulk mining methods to be employed, thereby significantly reducing unit mining costs and delivering an estimated
mine strip ratio of less than 1:1.
The Trilogy pit will be in operation for four years and has a life of
mine strip ratio 4.9:1 (waste tonnes to ore tonnes).