Lake Gleneida is a reservoir in the hamlet of Carmel within the Town of Carmel in central Putnam County, New York. Originally a smaller natural water body, Shaw's Pond, it was dammed by New York City in 1870 and enlarged to 168 acres (68 ha) for inclusion in its water supply system. It is classified as a controlled lake by the City system, and is part of its Croton Watershed.
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