Good morning n’@!
Me thinks Quinn muddied the waters a tad more w/explanation 2.0...but let’s see what happens when he “gets back.”
A neighborhood in my Twp was on news last night; road caving in due to subsidence (bad fill used back in the 60s). What was shown on news...tip of iceberg. Not just roadbeds w/issues...entire residential streets. My co-worker and I have been counting the floor bumps where we work (concrete floor under commercial carpeting cracking and plates rising). What ever they built this area on top of (back in the day) a lot of it is shifting badly) in a lot of places. Several years ago, one of our Catholic elementary schools had to close, and an apartment bldg condemned (both torn down) due to pyrite/fill issues that cropped up quickly (went from some floor and wall cracks to condemnation in a blink).
Like Rosanne Rosannadanna said “it’s always something.”
The entire area where I live is over mines. I live in an old coal mine ‘patch town’. In fact, my house - one of the only two houses that were single-family houses - was where the mine foreman lived. I told Mr. S we should consider mine-subsidence insurance.