UNITED STATES DEPARTMENT OF /AGRICULTURE 

 BULLETIN No. 1026 



Contribution from the Bureau of Public Roads 

 THOMAS H. MacDONALD, Chief 



Washington, D. C. 



May 16, 1922 



IRRIGATION IN NORTHERN COLORADO 



By 

 ROBERT G. HEMPHILL, Irrigation Engineer 



CONTENTS 



Page 



Introduction 1 



Cache la Poudre Valley 2 



Meteorology 3 



Soils r5 



^ Water Resources G 



Seepage Return 10 



Drainage Conditions 12 



Exchange of Water . 12 



Water Rights 13 



Distribution from River 19 



Duty of the River 24 



Canal Systems 26 



Gross Duty for Canals ..... ' . < . 42 



Farm Irrigation . 51 



Reservoirs 69 



Summary and Conclusions 79 



(Based on data gathered under cooperative agreement between the 

 Bureau of Public Roads of the United States Department of Agriculture 

 and the Colorado Agricultural Experiment Station) 



WASHINGTON 

 GOVERNMENT PRINTING OFFICE 



1922 



