Show abandoned mines used for mushroom business Greens greensbury greensburg burg ra pa abandoned coal mines have been utilized by westmoreland county residents in a business that lias has earned thousands of dollars within 1171 thin the past few years mushroom gr growing owing the dark daik hillside caverns with an even temperature of between 53 55 and CO 60 degrees were found to be ideal for or mushroom culture M I 1 ij rose county treasurer la is among those who be gan growing mushrooms in the mines many litany now have built large concrete houses to handle their rapidly growing business |