CHAPTER XIV. 91 



burst and do damage, the extent of which could not be foreseen, and 

 that the silckens would soon fill any dam that could be constructed. 



Reservoirs about the head-waters of our streams, as in such loca- 

 tions as Bear Valley and Hemet, will beneficially reduce flood and 

 torrent action, while furnishing such held back rainfall for summer 

 use. 



Another method that has been quite extensively used is the cross- 

 filling of canyon torrent channels with large rocks and boulders. This 

 makes what may be called a half dam. It detains the detritus, and does 

 also detain the flow of floods. 



