Cripple Creek & Victor Gold Mine seen from the sky. The towns of Cripple Creek and Victor are marked. |
Gold was discovered in a gulch outside of Cripple Creek in 1890. Within five years the town had grown to 8,000 people. The neighboring town of Victor was founded in 1894 . By 1901, at the peak of production, there were 500 mines in the District and $77 million in gold had been taken from the ground.
Gold production continued until it tapered off in the 1920's, with a brief resurgence in the 1930's. World War II saw a halt to all gold production. In 1995 , a new process of gold leaching was developed and extraction began again at the Cripple Creek & Victor Gold Mine. But this time the ore wasn't coming out of shafts, it was being mined in an open pit.
I am not going to give a lot of details about the early days of gold mining here in the District. That is a story for another series of posts. What I am going to write about is the modern day mining which is currently taking place just over the hill. The current owner of the Cripple Creek & Victor Gold Mine is Newmont Mining Corporation, a world wide mining company.
Pit located on northeast section of mining area. This pit is now used for rock disposal. |
This hillside is being stripped down to bare ground and will soon look like the photo below. |
The gold found here is not in the form of a nugget or dust. It is found mixed in with other minerals and must be separated from these other components via a leaching process. The ore bearing rock is sent to a crusher then on to a mill for processing. Once the rocks have been milled down to a more manageable size, they are then taken to a leach pit where the precious minerals are extracted. A diluted Potassium Cyanide solution is sprayed on the crushed gold bearing ore in the leach pit. The cyanide trickles down through the rocks, binding with the gold and silver. At the bottom of the pit are carbon filters which trap the cyanide/gold mixture.
Leaching area |
The rock which has no mineral value is loaded back on to dump trucks and taken to a part of the pit which has already been mined. There the rock is dumped and the mountain begins to take shape once again.
Disposal pit with roads running around the sides. Dump trucks can be seen bringing rocks to be dumped. |
Dump truck bed now being used for a viewing platform near the disposal pit |
On Monday, I will write about the new exploration going on at the mine and its impact on the local community. I'll also write about the community involvement of Newmont and the most important part of the mining process - reclamation.
Mountainside near disposal pit that has been reconstructed. |
When I saw the first photo of this post I thought of a distorted skull.
ReplyDeleteOpen pit mining is a scar on the landscape, no doubt about it. But it's also much safer for workers than underground mining.
ReplyDeleteVery interesting report!
ReplyDelete