1 68 



FORESTRY AND IRRIGATION 



April 



policy to permit it to be used by others 

 who may construct reservoir sites in this 

 mountainous drainage basin. The tun- 

 nel will be 4 miles in length between 

 portals. The interests of the city con- 

 sist, not only in obtaining an adequate 

 water supply for domestic purposes, but 

 in assisting the general development of 

 suburban property. 



As a result of the investigations by the 

 Geological Survey, a bond election has 

 been held in Santa Barbara and funds 

 have been voted, almost unanimously, 



the Mexican line will be finished soon. 

 This map will show all reservoir sites as 

 well as all the irrigable lands, and is the 

 basis for a comprehensive and exact 

 study of the irrigation situation along 

 this stream. 



The Topographic Division of the 

 Geological Survey, in cooperation with 

 the Imperial Company, is to make a to- 

 pographic map of the entire irrigable 

 district from Inyo south to the Mexican 

 line and east to the Colorado River. 

 This will be a very satisfactory basis 



1 



DAM SITE ON THE LOWER COLORADO. TWO MILES BELOW NEEDLES BRIDGE. 



for the construction of the tunnel line. 

 The building of reservoirs will probably 

 follow. Full details of the investiga- 

 tions are now being printed in a water- 

 supply paper entitled Storage of Water 

 in Santa Barbara County, California. 



Colorado River. During the winter 

 season practically all the work of the 

 Geological Survey for the California Di- 

 vision in the Southwest is being concen- 

 trated along the Colorado River. It is 

 in charge of Mr. E. T. Perkins, engi- 

 neer. A general topographic map in 10- 

 foot contours of all the lands between 

 the mouth of the Grand Canyon and 



upon which to study a general distribu- 

 tion system. 



Detailed'investigations are now going 

 on upon which will be based plans and 

 estimates of a project to irrigate the 

 lands both in California and Arizona, 

 above and below Yuma, all of which 

 data are to be submitted to the Secre- 

 tary of the Interior for his consideration. 

 Two diamond core drilling outfits are 

 at work on the river above Yuma, pros- 

 pecting for bed rock upon which to 

 found diversion structures. Definite 

 canal locations are being made, both on 

 the California and Arizona side, upon 



