55 



Kersey to Julesburg: 



River at Kersey 1^7 



Diversions 302 



River at Julesburg 130 



432 



Gain 295 



Percentage of gain 215. 33 



Stream as a whole : 



River at South Platte 217 



Diversions 833 



River at Julesburg "130 



0(53 



Gain 74G 



Percentage of gain 343.73 



Gain, excluding flow at Julesburg (JIO 



Percentage of gain, excluding flow at Julesburg 283.41 



The tables show that for July, on the stream as a whole, the average 

 gain for the whole stream between South Platte and the State line 

 is 1,082 cubic feet per second, and the diversions are slightly more 

 than four times the supply at the upper station. For August the 

 average gain, excluding a large flow at Julesburg, which was due to 

 local rains, is G16 cubic feet per second, and the average diversions 

 were nearly three times the supply at the upper station. 



These records show, however, that very little surface flow from 

 either the natural 'flow of the stream or return seepage passes the 

 State line. The average for July is but 3 cubic feet per second and 

 that for August 130 cubic feet per second, but this high average is 

 due to a large flow on a very few days caused by heavy local rains. 

 The average flow for the month of August outside of these few days 

 is but little larger than that for July. 



The fact that the tributaries of the Republican River rise so close 

 to the South Platte and the fact that the stream has from the earliest 

 settlement gone dry or nearly so in the sections below the mouth of 

 the Cache la Poudre, have given rise to the belief that the water of 

 the Platte sinks into the sand and finds its way into the tributaries of 

 the Republican. To test the correctness of this theory Mr. W. ^y. 

 Follett, under the direction of the late Col. E. S. Xettleton, made a 

 series of measurements in 1S91." The water levels in lines of wells 

 crossing the valley of the South Platte at various points were meas- 

 ured to determine whether or not the water-bearing strata were 

 above or below the level of the Platte at the points crossed. Mr. 

 Follett's measurements show that west of the Colorado-Nebraska line 

 the water in the wells measured and in the Frenchman branch of the 



a Largely due to heavy local rains August KJ and 23. 

 b 52d Cong., 2d Sess., Ex. Docs. 41, 42. 



