Olympia: The Age of Gods PBEM (May 4 1999)
A mine is a deep shaft or tunnel which allows workers to extract valuable resources from the earth, such as iron and gold. Mine shafts must be started in mountain provinces; there may be at most one mine shaft in a location. A mine shaft is built with the "BUILD SHAFT" command. To build a mine shaft, a noble must know [9128] Build Mine Shaft. Building a mine requires at least 3 workers and 500 worker-days of effort.
The initial mine shaft built in a mountain goes down 100 feet. Upon completion, it will appear as a new location "down" from the province, e.g.,
Routes leaving Landsdrop Mountains: North, mountain, to Trothguard [bo13], 10 days East, mountain, to Doriendor Corishev [bp14], 10 days South, to Ocean [bq13], Balatean Sea, impassable West, mountain, to Landsdrop Mountains [bp12], 10 days Down, mine shaft, to New mine shaft [g55], 0 days, depth 100 feet
To mine deeper, a noble must descend into this mine shaft and build another mine shaft there, which will descend an additional 100 feet. This may be repeated to tunnel to any desired depth.