Sewer (cesspool) line repair.
Not much to see here as it wasn't very thrilling. I'm just very happy that I checked on the condition of the "tank" lid. It was about a 1/2 thick concrete in some spots. Thankfully I didn't put the mini on it or I would've gone for a swim for sure.
Looks like someone just kept adding to the system with one final cesspool with ultra thin lid.
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done:
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Cesspools of that vintage in this area, were built up of slightly curved blocks, and have a beehive top, with a heavy 36"+ round concrete cover.
If the top is more than a foot below ground surface they can support something such as a mini-ex , but not a loaded single axle dump, or a ten wheeler.
Some years ago I installed a 1,000 gallon precast rectangular septic tank, (for myself) with a "heavy top".
I can drive my 7,800 lb. L48 TLB over it, but I prefer to avoid doing so.
For a leach pit I have a precast pit, similar to highway catch basin pits.