IKRIGATION INVESTIGATIONS. 477 



uremonts at each mile along the canal. This phin has also been fol- 

 lowed in our seepage tests in the other two valleys named. In the 

 Gallatin Valley the duty of water experiments have been continued 

 bv measurements of the water used on three dilierent farms. We 

 have also mad(^ seepage tests on the Kleinschmidt canal, Cameron ditch, 

 and the High-Line ditch of the West Gallatin Irrigation Company. 

 In the Bitter Root Valle}" three sets of seepage measurements were 

 made on the river, and similar measurements were made on many of 

 the larger canals. The studies of the duty of water in the Bitter Root 

 Valley have included measurements of the quantity used on 15,000 

 acres of the Bitter Root farm, and at three other farms located at 

 ditfenMit points in the valle}'. 



In a numl)er of localities in western Montana, notably at Great Falls 

 and in the vicinity of Bozeman, it has been demonsti-ated that crops 

 can be grown without irrigation, and it is manifest that there are large 

 areas in the State where the addition of a very small supplemental 

 water supply, through the adoption of winter irrigation, the conserva- 

 tion of moisture by proper cultivation, or the construction of small 

 reservoirs or pumping plants, will lead to the settlement and cultivation 

 of large areas where complete irrigation is not practicable. The study 

 of methods for supplementing rainfall by the use of small ((uantities 

 of water in irrigation is therefore one of the important unsolved prob- 

 lems of agriculture in Montana, and we have selected, IG miles south 

 west of Great Falls, a 20-acre tract on which to study winter irrigation 

 and diflerent methods of conserving moisture and utilizing small sup- 

 plies. It is intended to select locations in the vicinity of Helena and 

 Bozeman for conducting similar investigations. 



UTAH. 



E. R. Morgan, Agent and Expert; W. W. INIcLaughlin, Assistant in Irrigation Inves- 

 tigations, in charge. 



Investigations in Utah involve cooperative arrangements with both 

 the State experiment stjition and the State engineer's office. Mr. E. R. 

 Morgan, agent and expert, has been carrying on the work in coopera- 

 tion with the State engineer's office. This has l)een the determination 

 of the duty of water in different parts of the Weber River irrigation 

 system. As an aid to this there have ])een installed in all of the canals, 

 under the direction of the State engineer, adecpiate head gates and 

 measuring flumes, to permit of an accurate record of the water 

 used. The work this year was largely preliminary to more careful 

 studies next season, Mr. Morgan's time being devoted to putting in 

 rating flimies and weirs, selecting the localities, and measuring the 

 areas where dut}' of water is to be studied. All the ex})enses of this 

 work, aside from the salary and field expenses of our agent, have 

 been borne either V)v the State or the farmers and canal owners. 



