The Reservoir was built between 1858 and 1862, to the design for Central Park of Frederick Law Olmsted and Calvert Vaux, who designed its two pumphouses of Manhattan schist with granite facings. It was never a collecting reservoir; it replaced the smaller, nearby Receiving Reservoir. It received water from the Croton Aqueduct and distributed it to Manhattan. After 131 years of service, it was decommissioned in 1993, after it was deemed obsolete because of a new main under 79th Street that connected with the Third Water Tunnel and because of growing concerns that it could become contaminated. It was renamed in honor of Jacqueline Kennedy Onassis in 1994 to commemorate her contributions to the city, because she enjoyed jogging in the area, which lay beneath the windows of her Fifth Avenue apartment.