482 NATIONAL EECLAMATION OF ARID LANDS. 



These sluiceway's will be controlled immediately below the canal 

 intake by large gates operated by hydraulic machinery. \A^ien these 

 gates are closed the portions of the sluiceways above them become 

 immense settling basins from which it is planned to take the water 

 into the canals by a skimming process, so that the entire capacity of 

 the canals can be furnished by drawing but a foot in depth of water 

 from the surface. AVhen the silt has accumulated to a sufficient 

 extent the sluice gates will be opened and the great volume of water, 

 estimated at 20,000 cubic feet per second, . which will then pass 

 through the sliceways will carry the sediment out into the river. 



The main canal on the Arizona side will cross the valley of the 

 Gila River al)ove Yuma in a pressure pipe laid under the stream, 

 the top of which is to be several feet below the lowest point of the 

 stream bed. This structure will be of steel and concrete and about 

 3,000 feet in length. 



The shape of the levees adopted to protect the lower lands from 

 overflow is the same as has been developed by years of experience 

 along the Mississippi River. These levees will have a slope of 3 feet 

 horizontal to 1 foot vertical on the land side. They will be 8 feet 

 wide on top and 5 feet above the highest water mark. The levees 

 Avill be 4,000 feet apart, one on each side along the Colorado, and 

 3,200 feet apart along the Gila River. The total length of levees 

 will be 73^ miles. 



When the works are completed 07,000 acres will be ready for settle- 

 ment. The lands to be irrigated rival in fertility and productiveness 

 those of the famous valley of the Xile. They are especially adapted 

 to intensive farming. This section of the countrj^ is essentially a 

 region of small farms, owing to the almost continuous growing 

 season, and the production of high-priced fruits and vegetables. Ten 

 acres in careful cultivation is sufficient to support a family in comfort. 



MONTANA. 



Huntley j>'>"oject. — This project contemplates the reclamation of 

 about 30,000 acres of land located along the Yellowstone River in 

 southeastern Montana. These lands lie between Huntley, at the 

 junction of the Northern Pacific and Chicago, Burlington and Quincy 

 railroads, and Bull Mountain station on the Northern Pacific Rail- 

 way, and are therefore favorably located with respect to transporta- 

 tion facilities. The Huntley project lands are part of the ceded 

 strip of the Crow Indian Reservation, and as such are subject to the 

 provisions of the act of Congress approved April 27, 1904. Under 

 the provisions of this act the lands withdrawn for reclamation pur- 

 poses can only be settled under the terms of the reclamation act of 

 June 17, 1902 (32 Stat. L., 388), and in addition, the settler must pay 



