The
Contact Zone This aerial of the Bonanza Ridge dramatically reveals
the contact zone. All mining occurred just above this zone up to a distance of
approximately 300 feet from the base, but no farther. Sometimes the lengths of
the veins would exceed 1,000 feet. The Erie, Jumbo and Bonanza adits and the
adjacent surface camps were all placed right on the contact zone.
If you look closely you can see the abandoned Bonanza camp. You can click the above image for a closer view of the landscape, but also take a look below:
This is the detail from that photo showing the buildings perched
precariously on the very steep hill. You may also click this image for a wider
view. The photo was taken in 1955.
