The holes will reach bedrock, 4 to 10 feet below the lowermost level of the memorial.
When the hole reached river level, they did find water, a lot of water.
The water rose another foot inside the cone--the hole had not reached the open air outside.
Brushes against the rollers would make electrical contact when the hole reached the top.
The temple was dug out from its foundations and the hole (that remained) reached the water level.
This hole could not reach the bedrock due to heavy overburden.
On August 22, 2007, a fifth bore hole reached the mine tunnel.
On August 25, 2007, a sixth bore hole reached the mine tunnel.
When the hole reaches a certain depth the digger may jump in and work from there.
The first hole reached a depth of 3,098 feet two weeks ago, and drillers started work last week on a second hole.
