Statement of Significance (as of designation - April 27, 1992):
Constructed between 1837 and 1842, this aqueduct provided New York City with its first planned water supply system and served as a model for other cities. The eight-and-one-half foot tall, masonry-lined conduit ran 40 miles through undulating topography to central Manhattan; in a few places it is tunneled through solid rock or carried across valleys on bridges and berms, yet most of the aqueduct lies on a stone foundation immediately below ground.
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