As far as I know quarry lakes are created over time as rainwater fills the quarry over years. What keeps an open quarry from getting filled the same way when it rains?
Please tell me if the flair is wrong, I estimated this one to be the closest fitting.
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It’s not rainwater it’s groundwater. Rainwater in most regions is only a few feet per year, which would quickly evaporate. It’s when the quarry reaches below the local water it seeps in from the sides and underneath. It’s the same reason houses have sump pumps in the basement, although they do also pump rainwater out that saturates through the ground.
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