208 



IRRIGATION INVESTIGATIONS IN CALIFORNIA. 



{?>) protection of the fore.sts; {<:■) aid in the adoption of better methods of irrigation, 

 as the work now being done bj' the Department of Agriculture; (^7) collection of 

 accurate stream-flow and run-off data; and (e) storage of waters for the public lands. 

 It has already been stated that special legislation is needed to define rights to 

 stored waters, as at present these rights are vested in the riparian owners. 



Appendix. 



WATEK-BEABING GRAVELS AND FORMATIONS TRIBUTARY TO THE UNDER- 

 GROUND WATER SUPPLY OF THE SALINAS VALLEY IN MONTEREY 



COUNTY. 



By Edward H. Xutter. 



In June and Juh', 1900, under the direction of Dr. J. C. Branner, Mr. L. D. 

 Mills and I undertook to trace out and majj the formations in Monterey County 

 which appear to bear directly on the underground water supply of the Salinas Valley. 

 The work was done by Mr. Mills and myself, working together from June 4 to June 

 28, at which date Mr. Mills left, and the remainder of the work was done bj' me 

 without assistance. 



A general outline of the geological structure and history will perhaps serve to 

 make clearer the bearing of any details which may be given below. 



From Doud northwest the Salinas Valley is carved in granite and other crystalline 

 rocks, while the southern portion is cut in gently sloping beds of marine Pliocene 



Sandy Shale 



Granite 



Granite Soil 





"Sr 



Gypsum 



Serpantine 





Fig. 5.— Conventional signs used in illustrating report on Salinas Kiver. 



sediments. These beds, if they extend into the northern end of the valley, have been 

 completely buried by material which has been Avashed in from the hills and moun- 

 tains on both sides of the valley, and which has been spread out in the form of very 

 large alluvial cones or fans. Going southward from the district characterized by 

 these fans, the Pliocene gravels begin to crop out from beneath the talus at River- 

 bank and at a point about one mile south of the Salvation Army Colony, and grad- 

 ually rise until at Kings City they form a series of beds that extend eastward about 

 eighteen miles from the Salinas River. From Kings City to the San Luis Obispo 

 Countj' line these same beds form the southeastern escarpment of the immediate 

 valley, with an average height of about 100 feet above the river. For the most part 

 these Pliocene beds overlie Miocene sediment, but in some places they are on the 



