In 2006, we acquired the property providing access to the 14,000 foot Libby adit.
From the foxbusiness.com
A 75 metre long adit cuts a weakly oxidized, copperbearing massive sulphide layer.
From the foxbusiness.com
With the exception of the first 600 feet, the length of the Libby adit contains water.
From the foxbusiness.com
With additional development, the Libby adit will provide access to the Montanore deposit.
From the foxbusiness.com
It is a part of former silver mine, the adit was used for removing the water out of the mine.
From the en.wikipedia.org
The deeper the level of drainage, the longer the adit had to be.
From the en.wikipedia.org
Access to a mine by adit has many advantages over the vertical access shafts used in shaft mining.
From the en.wikipedia.org
The adit is expected to take at least 3 months to complete.
From the hemscott.com
There will be no opportunity to drive an adit to a mine situated on a large flat plain, for instance.
From the en.wikipedia.org
More examples
A nearly horizontal passage from the surface into a mine
An adit is a type of entrance to an underground mine which is horizontal or nearly horizontal. Adits are usually built into the side of a hill or mountain, and often occur when a measure of coal or an ore body is located inside the mountain but above the adjacent valley floor or coastal plain. ...
(Adits) an almost horizontal shaft into a mine for access or drainage.
(adits) entrances or passageways
A nearly horizontal underground excavation in an abutment having an opening in only one end. An opening in the face of a dam for access to galleries or operating chambers.
An access tunnel from the surface to the mine workings that is nearly horizontal. Adits are used to access longwall mines from previously worked highwall mines.
An opening driven horizontally into the side of a mountain or hill for providing access to a mineral deposit.
Horizontal passage to access mineralization, usually in the side of a hill
Level or sloping entrance to a mine, sometimes used for drainage.