42 BULLETIN 1026, U. S. DEPARTIMEXT OF AGEICLXTUEE. 



the size of the head he desires turned out. The riders meet every 

 morning at the office, list the demands, and compare them with tlie 

 credits remaining. Then they cover their " beats " and set the various 

 gates to deliver the amounts demanded. The vater is measured over 

 wooden rectangular weirs and the proper depth over the weir is de- 

 termined from tables which show for each size of weir the discharge 

 in Colorado statute inches, cubic feet per hour, and cubic feet per 

 24 hours. The rider's records include a daily report and a separate 

 delivery account for each user. The daily report of deliveries shows 

 the name of the farmer drawing : size of weir ; depth over weir ; hours 

 run and total cubic feet delivered during the day, the daj^ being 

 reckoned from midnight to midnight. In the record of delivery kept 

 by the rider each user is given a separate account in which is entered 

 a complete record of all water drawn. In addition there is kept at 

 the office at "Wellington a water ledger containing a record of all 

 credits and of all deliveries as compiled from the daily reports of 

 ditch riders. From this ledger the state of any account can be de- 

 termined at a glance. 



GROSS DUTY FOR CANALS. 



To serve as a basis for computing the dut}^ of water measured at 

 the heads of canals of the valley, the total area and the crops irrigated 

 by each canal in 1916 and 1917 are shown in Table 9. Each canal 

 is credited with all the land and crojDs irrigated by it, either alone 

 or in combination with other canals. Overlapping of areas served 

 by two or more canals, is the cause of considerable duplication of 

 acreage in the table. The effect of the war may be noted in the large 

 increase in food crops as well as in the appreciable increase in the 

 total acreage irrigated. 



In Tables 10 and 11 the water used by the canals of the valley in 

 1916 and 1917 is shown with a proper segregation of direct flow and 

 stored water. Under the head of direct flow has been included water 

 on direct appropriations, foreign water not stored, and certain ex- 

 change water. Thus, Windsor Reservoir water delivered to Greeley 

 Canal Xo. 2 in payment for Xo. 2 water taken above in exchange is 

 classed as direct flow. On the other hand river water taken b3^ the 

 Larimer County Canal in exchange for water in Lindenmeier Lake 

 is classed as stored water. 



