It never a good idea to totally cover a well,
It is the old type of septic tank systems that people fall in a lot, especially the ones at the bottom of gardens that are covered with a concrete slab and have a soak away tank,
Often adults, I know quite a few people who have fallen into their own tanks, it best to have a permeant ladder, or do what the environment agency want and replace with a klargester.
drowning in your own shit, not fun.
other people property is, is exactly that,
I have a stream at the bottom of my garden, low in summer big in winter, neighbour below is next to a fast river, lots of my friends live next to beaches, but wells are hard to get out of,
most wells if you look closely below the top few feet, are an oval shape, because they had to be dug, if you think of the smallest space a man and a shovel needs to dig, the white heart in Modbury recently found a round one ,middle of the pub, now with a glass top, which means it was dug by a child/children with buckets.
wells are one of the hardest, along with septic tanks to get out of.