32 



flows almost due north for a distance of 4.5 miles, where it reaches the 

 two farms on which its waters are used. The rating tlume in this 

 canal was placed about KW 3^ards below the head of the ditch. The 

 flume was made 8 feet lonjr by 4.7 feet wide and was provided with a 

 recording register. The season's record covered a period of sevent}'- 

 seven days, extending from June 1 to August !<!. The discharge of 

 tlie ditch is summarized in the following table: 



IHsdiarge of Weaver unci Stone ditch, 1902. 



Only portions of the Weaver and Stone farms require irrigation, 

 the remainder being sufficiently moist by reason of seepage waters 

 from irrigated lands above. In order to obtain the acreage subject to 

 irrigation during the season of 1902 a stadia survey was made. The 

 results of this survey appear in the following table: 



Irrigated lands under Weaver and Stone ditch, 1902. 



The total discharge for the season would cover this area to a depth 

 of 5.56 feet. The average flow at the rating flume during the seventy- 

 seven days of record was 7.38 cubic feet per second, making the duty 

 of water 27.25 acres for each cubic foot per second, or 0.68 acre per 

 inch. 



A measurement to determine seepage losses in the long supply canal 

 was made during the latter part of the season. This measurement 

 showed that w^ien there was a discharge of 4.52 cubic feet per second, 

 the long transmission in the small ditch, without either uniform grade 

 or cross section, caused a loss of approximately 50 per cent. When 

 this is taken into consideration, the depth of water received by the 

 Weaver and Stone farms is 2.78 feet. This is a duty of 54.5 acres per 

 cul)ic foot per second, or 1.36 acres per inch. 



