Lest there be any doubts there is still frost in the ground...
I have a 1" poly supply line that comes out of my foundation about 8' underground. It runs downhill to a shed we have near the shore, eventually coming out of the ground a bit before the shed.
In the Fall, I shut off the supply, drain it, and leave it open so it won't freeze. But clearly there are a few low spots that hold a bit of water. When I turned on the line today, 2-3 long hunks of ice came out of the line. The low spots had frozen in small slivers and were still frozen until I flushed them out today.
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