The Mudcat Café TM
Thread #159495 Message #3779419
Posted By: Stilly River Sage
17-Mar-16 - 09:53 AM
Thread Name: UK patio event: Mine shaft or sink hole?
Subject: RE: UK patio event: Mine shaft or sink hole?
Backfilling a 300 foot deep shaft would take a LOT of fill. I suspect another cap would go in place instead, engineered to last another 100 years.