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Show COMMISSIONER OF INDIAN AFFAIRS. 2 1 1921, that construction of the dam be undertaken by " force account," under the immediate supervision of Assistant Chief Engineer C. R. Olberg, of the Irrigation Service, this bureau. Actual work on the construction of the dam was begun in Feb-ruary, and while many adverse conditions were encountered, nev-ertheless the work has progressed very rapid1 and. on. J une 23 En-gineer Olberg wired that the main slab un er ex~s t~ncgo,n ditions: would probably be completed by July 4. Upon its completion the bulk of the work is over and the danger of any damage resulting from unexpected floods passed. This dam will be of material benefit to both the Indians and whites in that part of the State of Arizona. The appropriation act for the fiscal year 1922 provided $150,000 for the construction of a diversion dam across the Big Horn River, Crow Indian Reservation, Mont. Due to the extreme drought, im-. mediate work on the dam was imperative if the crops for this sea-son were to be furnished water. To meet the exigency a joint reso- . lution making the money for this purpose immediately available was approved by the Congress on May 6, 1921. Work was there-after romptly begun on the dam, and the crops in the aggregate of three- f ourths of a million of dollars have been saved. Considerable concern has been manifested by several outside par-ties of the State of Idaho interested in effecting an arrangement for the enlargement of the Fort Hall irrigation project to include.cer-tain lands in white ownership. The impression seems to prevail among many pea le that there is much more water available than is necessary for the % art Hall proj-ect. as now constituted. Information of the office indicates that the total acreage that can be served by the resent project when it is re-paired and partially reconstructed is a f out 54,000 acras. The pres-ent supply of water is sufficient to irrigate in addition thereto about 16,000 acres. It is the desire to cooperate with these interests where coopera-tion is possible, to the end that every drop of available water be osed upon the lands susceptible to, economlc irrigation. Supervis-ing Engineer Dietz was therefore instructed to cooperate with the State engineer of Idaho in obtaining data to enable a thoroug11 study of this matter for the purpose of determining some feasible plan which will work justice to a11 concerned. There are several methods of securing water for irrigation pur-. poses, such as damning rivers, pumping from underground reser-voirs, or impounding flood waters. T h e first has been ionf est used .:. . , and is the most general. Pumping water has been resorte to wlth satisfactory results and in some localities is the best if not the only means of supply. This is particular!^ true in the Navajo country where water is especially scarce. Dunng the past year a great num-ber of wells have been driven which have proven satisfactory and. have been the means of addlng considerable area to the gradng rang.. e . ALLOTMENTS. The allotment work on the Gila River Reservation in Arizona was completed and schedules containing 4,869 selections of irrigable and nonirrigable land, embracing approximately 96,000 acres, were ap-proved. These allotments consist of 10 acres of irrigable land and |