BULLETIN 1026, V. S. DEPAETMENT OF AGRICULTURE. 



Table 2. — Discharge of the Cache la Poudre River at gaging station at mouth 



of canyon. 





Discharge in second-feet. 



Esti- 

 mated 



Year. 



Jan. 



Feb. 



Mar. 



Apr. 



May. 



June. 



July. 



Aug. 



Sept. 



Oct. 



Nov. 



Dec. 



annual 

 discharge 

 in acre- 

 feet. 



1884 .. . 









219 



2,536 



1,419 

 1,309 



4,812 

 2,910 

 1,872 

 1,802 

 1,117 

 1,339 

 1,281 

 1,833 

 1,512 

 1,802 

 2,063 

 2,346 

 1,062 

 1,728 

 1,317 

 2,609 

 3,281 

 2,049 

 1,291 

 2,715 



2,143 



1,860 

 717 

 737 

 421 

 511 

 647 

 541 

 735 

 614 

 735 



1,222 

 452 

 511 

 485 



1,452 

 674 

 774 

 379 

 964 



1,043 

 908 

 935 



1,757 

 792 



1,852 

 269 

 764 



1,230 

 538 

 818 

 700 

 754 



2,050 



792 

 657 

 306 

 310 

 201 

 184 

 290 

 228 

 209 

 237 

 339 

 499 

 274 

 379 

 154 

 563 

 231 







176 

 282 

 328 

 340 



305 

 272 

 185 

 174 

 105 

 69 

 103 

 138 









689,000 

 478,000 

 302,000 



1885 















1886 

















1887 

















1888 











4S9 



770 

 1,046 

 1,250 



40S 



570 

 1,406 

 1,191 



912 

 1,960 



656 

 1.206 

 3; 095 

 1,802 

 1,069 



801 









169,000 

 203,000 

 271,000 

 275,000 



1889 









113 



200 

 144 



70 

 81 

 118 







1890 





:::;:: 







1891 













1892 













1893 













::::::::;: 





1894 











164 

 220 

 294 

 166 

 70 

 216 

 134 

 135 

 166 

 164 

 176 

 158 



104 







321 000 



1895 











175 

 199 

 123 



61 

 156 

 108 



99 

 136 

 156 







374,000 

 219,000 



1896 















1897 















303 000 



1898 









146 







192 000 



1899 













408,000 



1900 









742 







518,000 



1901 













1902 









106 







219,000 



1903 













337 000 



1904 









161 

 317 









1905 \ 







1,031 



1,083 



646 



"""763' 

 780 

 819 

 785 

 920 



2,147 

 591 

 847 



1,295 



2,707 

 1,652 

 2,777 

 1,493 

 3,703 

 947 

 1,707 

 2,186 

 1,230 

 2,500 

 1,521 

 1,703 

 3,996 









356,000 



1906 ■ 















1907 i 







119 

 135 

 239 

 179 

 69 

 63 



473 

 766 

 452 

 128 

 218 

 429 

 265 

 335 

 274 

 397 

 392 



186 

 229 

 331 

 152 

 173 

 212 

 204 

 195 

 208 

 263 

 292 









388,000 



1908 * 















1909 i 







140 

 154 

 126 

 163 

 184 

 91 

 116 

 114 







466 000 



1910 i 











176,000 

 252,000 



1911 











1912 













325 000 



1913 













229,000 



1914 









215 





400,000 



1915 











232, 000 



1916 









151 

 134 



1 



274,000 



1917 









111 







518,000 



Average 















d i s- 



charge, 

 sec .-ft .1. 



Equiva- 

 lent dis- 

 charge, 

 acre-feet 



Per cent.. 



50 



3,070 

 1.0 



55 



3,050 

 0.9 



55 



3,375 



1.1 



192 



11,405 

 3.6 



1,147 



70,405 

 22.0 



2,087 



123,970 

 38. 7 



911 



55,920 

 17.5 



347 



21,300 

 6.7 



189 



11,225 

 3.5 



127 



7,795 

 2.4 



83 



4,930 

 1.5 



60 



3,685 

 1.1 



320,000 



320, 130 

 100.0 



1 The figures in this line are not averages of the preceding figures hut were obtained by combining 

 the daily averages for each month. By this method records for only a part of a month which could not 

 be shoWh as a monthly average could be included in the general average. 



Figure 2 shows the discharge of the river from April to September, 

 inck^sive, during 1916 and 1917, the period of the investigation, as 

 compared with the average for a period of 34 years. It will be 

 noticed that the discharge for 1916 was very nearly normal, but that 

 for 1917 was far above normal. 



The small creeks tributary to the Cache la Poudre River below 

 the canj'On furnish only a small percentage of the total water supply 

 of the valley. Rainstorms flood these creeks for a day or two, but 

 ordinarily they are dry or nearly so, except where a flow of a few 

 second-feet is produced by seepage. Records of flow of the more im- 

 portant of these tributaries, together with estimates for the smaller 

 streams, show that the supply from this source is about 40.000 acre- 

 feet in average years, of which 15,000 acre-feet may be classed as 



