Engineering Wonders of the World
Volume III

112 ENGINEERING WONDERS OF THE WORLD. spectively, from which the waters would be led by an aqueduct into the main Catskill Aqueduct about two miles below the Ashokan Reservoir. Later, the Schoharie watershed will be brought into service by the construction of the Prattsville Reservoir, with a capacity of 9,400,000,000 gallons, brought into Esopus Creek by means of a. 10 miles tunnel through the mountains. Finally, the Catskill waters will be impounded in three reservoirs—at Franklinton, Preston Hollow, and Oak Hill— with an aggregate capacity of nearly 25,000,000,000 gallons, and brought into the Ashokan Reservoir by an aqueduct running south between the mountains and Hudson River. These extensions of an already colossal undertaking would put at the com- mand of Greater New York an addi- tional daily supply of 200,000,000 gallons of water. For much valuable information, helpful to the production of this article, the author desires to express cordial acknowledgments to Mr. Walter H. Sears, chief engineer of the City of New York Aqueduct Commission; and to Mr. J. Waldo Smith, chief engineer, and Mr. Alfred D. Flinn, department engineer, of the Board of Water Supply. CATSKILL AQUEDUCT : TYPICAL SECTIONS.