The Supply and Uses of Water 



191 



entire area of the 

 region which sheds 

 its water into the 

 eastern branch of the 

 Delaware River. The 

 Ashokan Reservoir 

 (Fig. 56), the main 

 collecting reservoir of 

 the region, is twelve 

 miles long, one mile 

 wide, one hundred 

 ninety feet deep, and 

 holds\32,000,000,000 

 gallons of water. It 

 is five hundred ninety 

 feet above sea level. 

 From this reservoir 

 the water is conveyed 

 through an aqueduct 

 about ninety-two 

 miles long to the city 

 limits at Yonkers. 

 The conduit on the 

 surface (Fig. 57 A) 

 is what is called "cut 

 and cover," with a 

 base dimension of 

 seventeen and one 

 half feet and a height 

 of seventeen feet. 

 This kind of conduit 

 extends for forty-five 

 miles. The conduit 

 underground (Fig. 57 

 B) is circular, with 



