On Aug 11, 12:24 pm, hk wrote:
Eisboch wrote:
"hk" wrote in message
...

We lucked out and got a high flow of good water at 250'. One of our
near-neighbors had to go down more than 400 feet. We get a water test
every year from the county and so far, so good. The county has little
interest in piping municipal water to "us'ns" out here in ruralville.

It's surprising that you hit at 250', yet your neighbor had to go over 400'.
My understanding, based on what the well driller told me, is that deep wells
are dug into the bedrock. The bedrock is basically saturated with water,
typically for many miles around ... even hundreds of miles . As you draw
water, the bedrock local to your well tip re-saturates almost immediately.

Eisboch

It's not the first time I have encountered this anomaly. I had a well at
one of the houses I had in Northern Virginia. We went down about 325'
there, but families nearby went down 225' and a couple went down more
than 400'.

We have a dry creek bed, a really deep one, at the back of our property
that goes right to the Bay, and we're at least 100' above sea level.
Considering how close we are to the Bay, when there was water in that
creek, the flow rate must have been phenomenal. The truly amazing thing
is that the creek bed starts on our property, and there is no evidence
of water flow at that point. So...where did the water that carved the
creek come from? Glacial carving?

--
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Perhaps the "Creek bed" formed over a crack in underlying rock and the
material in the bed both washed into the rock and downhill thus
exagerating the appearance of flow. What type of rock?