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<br />
<br />CHAPTER III
<br />
<br />BASIS FOR ANALYSES
<br />
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<br /> Arable land serviceable by project
<br /> (acres)
<br /> Little Flag Josephine Milk
<br /> Beaver Creek Basin Creek Total
<br />Irrigated
<br />Class 2 1,010 1,700 20 1,650 4,380
<br />Class 3 600 1,680 1,530 3,810
<br />Subtotal 1,610 3,380 20 3,180 8,190
<br />Nonirrigated
<br />Class 2 4,740 930 2,260 4,870 12,800
<br />Class 3 7,430 1,940 2,030 6,790 18,190
<br />Subtotal 12,170 2,870 4,290 11,660 30,990
<br />Total 13,780 6,250 4,310 14,840 39,180
<br />
<br />., {.
<br />
<br />About 8,190 acres of the arable land is cultivated and irrigated,
<br />about 12,000 acres cultivated but not irrigated, and about 18,990 acres
<br />still with native cover. All of the arable lands are in classes 2 and
<br />3. No lands were determined to be class 1 because of the relatively
<br />short growing season in the project area.
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<br />
<br />Lands in the project area have a wide range of topographic and soil
<br />conditions. Slopes are generally about 5 percent on the fans and terraces
<br />and 1 to 2 percent on the flood plains or valley floors. Arable areas be-
<br />tween the various land farms have slopes up to 12 percent. In nonarable
<br />areas slopes often exceed 12 percent. The sails are gray brawn to reddish
<br />brown. They are principally alluvial and have generally goad structure,
<br />good water-holding capacities, and law alkali and salt content.
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<br />
<br />Drainage
<br />
<br />Land characteristics in the project area are generally favorable
<br />to goad natural drainage. It'is estimated that some localized areas,
<br />almost equally divided between the White River and Milk Creek Segments,
<br />might develop drainage deficiencies if project water were applied to
<br />them. These deficiencies are anticipated where unfavorable topographic
<br />conditions or shallow depths to bedrock exist and where sails of law
<br />permeability retard ground water movement.
<br />
<br />The deficient lands would be provided with drains as a part of proj-
<br />ect development. In addition to the project drainage some farm drainage
<br />may be required for removal of excess surface water an individual farms.
<br />The farm drainage, however, would be the responsibility of the individual
<br />landowners.
<br />
<br />Farm size and excess lands
<br />
<br />The irrigated land required far efficient farm operation would be
<br />in excess of the 160 acres for ",hieh "ater could be provided from a Federal
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