30 



The loss in this same section of canal as determined on July 19, 

 1900, was found to be 15.13 cubic feet per second when the discharge 

 at the head of the section was 99.56 cubic feet per second. 



Based on the mea.'*urements made in 1902, the seepage loss in the 

 26.5 miles of canal measured would be as follows: 



SeeiMige loss In 36.5 miles of High Line canal, June 24-25, 1902. 

 [In ciiliic feet per second.] 



Discharge at point 0.5 mile below head 98. 68 



Discharge near 27-niile post 19. 87 



Diversions in section • ^^- '1 



Total outflow from section - 74. 58 



Loss. 



24.10 



Correction due to change in flow of canal 2. 22 



Total loss in 26.5 miles 26. 32 



Loss per mile ""^ 



Percentage of loss per cent. . 26. 67 



Taking this 26.67 per c.ent as representing loss in transmission in 

 main canal line, and disregarding losses in distributar}- laterals, we 

 haA-e as the depth of water on the 2,343 acres irrigated during 1902 

 4.19 feet. 



DUTY OF WATER UNDER KUGHEN DITCH. 



The rating flume on the Kughen ditch is located about 0.5 mile 

 below the head of the canal and al)out 300 j^ards above where the first 

 lateral takes water from the ditch. As there was no suitable structure 

 on the canal which would answer as a rating flume, a new flume was 

 placed in the canal. The section of the canal l)oth above and below 

 the flume for a distance of 100 to 200 j^ards is in splendid condition as 

 to alignment and cross section. The flume is 11 feet long by 10 feet 

 wide and so placed that little or no eddying is caused either by the 

 waters entering or leaving the flume. The average depth of water in 

 the flume when the canal was carrying its normal amount was a})out 

 2.5 feet. 



This flume was provided with recording register and was carefully 

 rated during the season. The dally flow from June 4 to August 16, 

 inclusive, a period of seventy-four days, is summarized in the follow- 

 ing table: 



Discharge of Kughen ditch, 1902. 



Month. 



Avenige flow. Discharge. 



Oil. ft. per sec.\ Miner' sin. Acre-Jeet. 



r ,t on\ I 49.4 1,976 2,640 



June(4-30) ] ,,^ g 21344 ' 3,603 



33.7 I 1,34S I 1,079 



July 

 August (1-16) 



Season. 



49.9 I 1,996 7,328 



