A commenter on the reservoir proposal[1] pointed out the existence of quarry lakes[2], which is a lake that is formed after a quarry has been dug after a mining operation. It was suggested that such bodies of water should be tagged separately from other lakes with a tag such as water=quarry.
Should quarry lakes be tagged under a separate value from water=lake? Should quarry lakes be tagged as a subset of lake, something like water=lake + lake=quarry? If there is consensus that quarry lakes should be excluded from water=lake, obviously that impacts how water=lake is defined. Existing usages: water=quarry_lake: 37 water=quarry: 27 water=Quarry: 18 lake=quarry: 1 [1] https://wiki.openstreetmap.org/wiki/Proposed_features/Reservoir [2] https://en.wikipedia.org/wiki/Quarry_lake
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