178 CLASSIFICATION OF THE PUBLIC LANDS. 



from any use. It is true that withdrawn lands are now available 

 for use under the right of way acts, but they can be used for power de- 

 velopment only under a permit revocable at will. Such a method is 

 hopelessly inadequate and tends to discourage development. Eecom- 

 mendations for additional legislation have been repeatedly made by 

 the department, and -several very satisfactory bills have been intro- 

 duced in Congress, but so far no suitable laws have been enacted. 



CLASSIFICATION OF LANDS AS REGARDS IRRIGABILITY. 



FIELD METHODS. 



QENUBAI. COirSII>i:KA.II0NB. 



The general considerations and particular features already dis- 

 cussed under " Classification of power sites " apply to the classifi- 

 cation with respect to irrigability. They include determination of 

 the relative value of water in its different uses and, in the case of 

 reservoirs and headworks, the value of the land for other purposes. 

 The field of investigation must be quite as broad and comprehensive 

 for this purpose as for the classification of water-power sites. The 

 engineer who performs the investigation is required to equip him- 

 self with the preliminary facts available in the office, such as maps 

 and records of stream flow, and his instrumental equipment is prac- 

 tically the same as that already described. 



A suitable report on the classification of lands as regards irriga- 

 bility should cover as many of the subjects listed in the following 

 sj'Uabus as may be relevant: 



I. Sources of data used in report : 



1. Personal examination ; route followed and time consumed. 



2. Water-supply papers. 



3. Maps. 



4. Reports of engineers. 



5. Miscellaneous. 



II. General introductory description: 



1. Name of project. , 



2. Where located. 



3. When started. 



4. Estimated time of completion. 



5. Concise description of project, including — 



(o) Area involved. 



(6) Source of water supply. 



(c) Outline of irrigation system. 



(d) Important or critical structures involved. 



6. Nature and extent of control of the lands : 



(o) Carey Act. 



(6) Municipal district. 



(c) Ownership by developing company. 



(d) Contracts with land owners. 



(e) Contracts with desert-land or homestead eutrymen who have 



no titles. 



7. Railroad and other transportation facilities. 



