308 Irrigation and Drainage 



and one -fourth miles the writer counted no less than twenty 

 such wheels. 



The wheels were 16 feet in diameter, provided with a row 

 of 24 churnlike buckets on one or both sides, emptying their 

 contents into a trough, from which the water was led away in 

 a flume hewn from a log. At the time the view was taken, 

 this wheel was making three revolutions per minute, and dis- 

 charging 450 gallons, or enough to supply nearly 120 acres with 

 2 inches of water every 10 days, the water being raised 12 feet. 



On the Grand river, near Grand Junction, Colorado, the 

 Smith Brothers have placed two 36-inch turbine wheels so 

 that they drive a battery of two centrifugal pumps, one above 

 the other, on the same 8 -inch discharge pipe, and lift water 

 82 feet, discharging it into a flume, as represented in Fig. 68, 



Fig. 68. Mouth of 8-inch discharge pipe 82 feet above Grand river, 

 Grand Junction, Colorado. 



at the rate of 2,200 gallons per minute. The two wheels were 

 together rated at 90 horse -power, and were developing not far 

 from 54, as measured by the water lifted. They were supply- 

 ing water for 80 acres of alfalfa and 120 acres of orchards, 

 working only during the daytime, the water being carried a 

 mile in flume and ditches. 



Other forms of water wheels, like the overshot, undershot 

 and breast wheels, are used for driving centrifugal and other 

 pumps to lift water for irrigation, and in large streams, where 



