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LAWRENCE, MASSACHUSETTS (1875) The next American aerator of record was of the single cascade type. It was part of the water works of Lawrence Massachusetts, completed in 1875. Water from the Merrimac River or an adjacent filter gallery was discharged from the force main through a bell-shaped mouth onto a stone platform from which it fell over six granite steps, each 10 feet wide into the reservoir.
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Category:Archaeological sites in the United States by state