Dr. Greg Brick
In addition to the Ford mines proper, Ford mined out 1.5 miles of passages below what is now Shepard Road, at a location several miles downriver. The passages are about 20 feet wide and 30 feet high—wide enough for two trucks to pass side by side, and higher than a telephone pole. The Civil Defense […]
A three kilometer reach of the Mississippi River gorge near downtown St. Paul, Minnesota, is known locally as “Mushroom Valley” because of the abundance of man-made mushroom caves in the sandstone bluffs. Mushroom growing lasted a century, from its introduction by Parisian immigrants in the 1880s until the last cave ceased production in the 1980s […]