When digging a trench and hole to install sewer drain and a septic tank, I hit something really solid and heavy with the backhoe. It turned out to be a concrete cap, 6' under dirt that was bolcking a hand dug, rock lined well, also 50' deep. It was impressive just how tightly the stones where stacked. Since there was another hand dug well that was built on an old homesite (built in 1904), there is no telling how old the well was that I uncovered.

It was right where I'd intended to put the septic tank, and time was running on the backhoe rental, so I filled in the well to a depth of 15' and put in my tank. To this day, I wished I had explored the bottom. It was roughly a 4' diameter, and with each rock being triangular shaped and interwoven, outer pressure only made the casing seal better.