They pushed another twenty yards through light brush, and then suddenly the mine pit opened out in front of them.
The former mine pit is covered with lily plants for the ceremony.
The region is scarred by ancient mine pits and trenches up to 20 feet deep.
In January 2013, the mine pit overflowed for the first time ever.
There are empty mine pits off to the west.
The maximum pumping rate achieved was approximately 27,000 gpm at the mine pit.
And in 1981 the ground gave way beneath a 12-year-old boy, who was swallowed into the mine pit.
But how were they to get past the mine pit?
The barracks and other buildings were on a low mesa to the east of the copper mine pit.
Old mine pits form deep pools, which are fed by streams.