Where did the sinkhole come from?
My son graduated from high school and became a master plumber.
Over the past two decades, he went from master plumber to also being a certified HVAC technician and has added HVAC design to his list of accomplishments. His company was working on a major overhaul of an old mansion. The historical society was turning the 200 years old mansion into a museum. There were holes in the roof and the basement was a disaster. Once the construction company got the roof replaced, he was ready to start his work. He had a crew working on the plumbing while he started looking at how to lay out the HVAC system. He had one of his men come up and tell him he had to see what he found. There was a huge sinkhole in the basement. They weren’t sure if it was a mining sinkhole, or some other problem. He stopped the HVAC installation and the construction until an engineer could come in. He said there were no mines in the area, and he did not understand why the subsidence was there. He looked back through the geological and original house plans. They had an Artesian spring that ran directly under the house, and they had harnessed it to help cool the house. They had to put a special covering over the spring, so it didn’t cause the house to sink. They installed the HVAC system in a special room on the main floor, and they could complete the mansion. He was telling me about the way the old mansion had an original idea for air conditioning. He said it was a genius use of geothermal for air conditioning and it impressed him.