Board of Water Supply. Model of Water Supply System of New York City. Relief map including Catskill Mountain watersheds and reservoirs; Croton, Bronx, and Byram watersheds and reservoirs; Ridgewood watershed and reservoirs; Catskill, Croton, Bronx, and Ridgewood Aqueducts. December 1916. Model constructed for Board of Water Supply by Morgan Bros., Co., Inc. Location uncertain, probably room 2218 of the Municipal Building, where Board of Water Supply headquarters were located (number visible on door, image is rotated). The New York Public Library held an exhibit from May 1-November 6, 1917, illustrating the history of the City's water supply with models, photographs, and other materials. It's likely that this model was included. The exhibition booklet described it as "a colored relief model map of the watersheds from the Schoharie and Esopus to Greater New York, including a portion of New Jersey. This map measures 11 feet 9 inches by 5 feet 2 inches. Its horizontal scale is a mile to an inch, and the vertical scale shows an elevation of one inch to 1,600 feet. The different watersheds are depicted by distinctive colors; the route of the Aqueduct is indicated, from its source to all parts of the city; and the connections of the Catskill Mountain watersheds, with the Croton, Bronx and Byram watersheds, and the Ridgewood system on Long Island, are shown." The exhibit was later transferred to the American Museum of Natural History.