22 



Discharye of Wed Gallatin tributaries, 1903. 



Xamo of triliuliiry. 



Date of 

 measure- 

 ment. 



Discharge. 



Cubic feet 

 per second. 



Miner's 

 inches. 



Cottonwood Creek 



Do 



Do 



Do 



Bear Creek 



Do 



Do. 



Do 



Wilson Creek. 

 Do 



Do. 



Spanish Creek. 



June 3 

 June 23 

 July 10 

 Aug. 13 

 June 3 

 June 23 

 July 10 

 July 13 

 June 3 

 July 10 

 Aug. 13 

 June 10 

 July 17 

 June 10 

 ....do... 

 June 18 



Squaw Creek June 11 



Swan Creek do . . . 



Moose Creek do . . . 



Portal Creek | do . . 



Dudley Creek j do . . , 



West Fork | June 12 



Waters ditih (Porcupine Creek) do .. 



West (Jallatin River at William.s bridge j June 9 



West Gallatin River June 14 



Do. 



Logger Creek 



Hell Roaring Creek 



Do. 



128.02 



127. 72 



64.48 



32.63 



46. 91 



27. 50 



12.94 



7.07 



22. 18 



8.68 



4.44 



464.33 



163. 59 



5.51 



306. 76 



91.69 



137. 65 



142. 70 



52. .50 



• 160. 00 



77.96 



607. 81 



1.78 



4,361.22 



4, 767. 81 



5,120.8 



5,108.8 



2, 579. 2 



1,30.5.2 



1,876.4 



1,100.0 



517. 6 



282. 8 



887.2 



347.2 



177.6 



18, 573. 2 



6,543.6 



220. 4 



12, 270. 4 



3, 667. 6 



5, 506. 



5, 708. 



2.100.0 



6,400.0 



3,118.4 



24, 312. 4 



71.2 



174,448.8 



190, 712. 4 



Like all mountain streams whose flow" is derived from melting snows 

 high up in the mountains, the West Gallatin is subject to a large flood 

 flow during the spring season, estimated by the United States Geo- 

 logical Survey to reach in some years 4.5 times the average normal 

 discharge. 



Following is a summaiy of the observations made by the United 

 States Geological Survey at Williams bridge for a period of six years, 

 1896 to 1901, inclusive: 



Annual discharge of West Gallatin River at WilUanis bridge. 1896-1901. 



The actual minimum flow of the rivers for the years given above is 

 somewhat greater than that noted, as five ditches head on the' river 

 above the gauging station. During the irrigation sea.son the combined 

 flow of those five canals would j^robably reach 120 or 125 cubic feet 

 per second. 



From the mouth of the canyon to a point on the river about 25 miles 

 below the river has an average fall of 32 feet per mile, and its channel 



