FEATURES AND WATER RIGHTS OF YUBA RIVER. 125 



The drainage area tributary to tliese reservoirs is 28.4 square miles, which 

 receives a total precipitation during an average year of 4,589,481,600 cubic feet, of 

 which 1,849,30-1,804 cubic feet is stored, or between one-third and one-half the mean 

 annual precipitation. 



MIDDLE TUBA. 



On the Middle Yuba there are no reservoirs storing water at the present time. 

 The only site of any importance is the Ruyard or English Reservoir which has not 

 been in use since June, 1883, at which date the dam failed. It has a capacity of 

 650,000,000 cubic feet. 



Weaver Lake is on the watershed of the Middle Yuba, but its catchment area is 

 not large enough to fill it, so it is supplied from the Eureka Lake Company's Ditch 

 from Canyon Creek, a tributary of the South Yuba, and is included in the previous 

 list. At Milton there is an old reservoir site with an estimated capacity of 28,000,000 

 cubic feet. The total storage on the Middle Yuba may be considered 678,000,000 

 cubic feet. 



NORTH YUBA. 



On the North Yuba there ai'e the following small lakes: 



Lakes on Xorth Yttba River. 



Acres. 



Upper Sardine 38 



Lower Sardine 4C 



Young American 9 



Volcano 2i 



Packer 7 



Saxonia 2i 



Deer 5 



Upper Salmon 30 



Lower Salmon 50 



Hawley 11 



Spencer laKes (2 ) 16 



Sundry small lakes (5 not named) 27 



Deadmans 3 



Total ; 241 



These might be developed to an aggregate storage capacity of 500,000,000 cubic 

 feet. 



Assuming that artificial storage on the North and Middle forks could be devel- 

 oped to a capacity equal to that above Lake Spaulding Dam, there would then be in 

 service an area of 6.8 square miles at an avei-age depth of 26.4 feet, or 5,692,000,000 

 cubic feet. 



The mean annual precipitation upon the drainage basin of Yuba River is 170,- 

 829,000,000 cubic feet. The total ultimate artificial storage is less than 3.3 per cent 

 of this precipitation and could hardly be recognized in a gaging of the total run off. 



The losses from the surfaces of reservoirs from evaporation have been measured 



