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<br />3023~3 <br /> <br />CHAPTER III ' <br /> <br />PROJECT DEVELOPMENT <br />(Wessels unit) <br /> <br />. <br /> <br />Estunated costs--Wessels unit <br /> <br />Item <br />Dear Reservoir <br />Wessels CanaJl/ <br />Laterals and drains <br />Past investigations <br />Future investigations <br />Total <br />J:./ Includes <br /> <br />Construction <br />cost <br />$l,Otl1,OOO <br />1,004,000 <br />302,000 <br />26,000 <br />75,000 <br />2,~o,ooO <br />cost of diversion dam. <br /> <br />Annual operation, <br />maintenance, and <br />replacement costs <br />$1,000 <br />8,200 <br />2,700 <br /> <br />12,700 <br /> <br />Unit lands and land use <br /> <br />The irrigable acreage to be served by the Wessels unit is summar- <br />ized below by land class. <br /> <br /> Irrigable acreage--Wessels unit <br /> (Un! t-~acres) <br /> Full irriga- Supplemental <br /> Land tion service irrigation <br /> class land service land Total <br /> Class 1 55 55 <br />. Class 2 2,790 350 3,140 <br />Class 3 ~185 370 3,555 <br /> Total ,030 720 6,750 <br /> <br />Lands of the Wessels unit are from 6,500 to 7,000 feet in elevation. <br />They are situated on the terraces adjoining the flood plain of the Y~a <br />River anG. in the valleys of the small streams flOWing into the river. <br />The lands may be :readily divided into efficient fam units. The soils <br />are principally alluvial and have high fertility. In general they have <br />good structure and good water-holding capacity, and the top soils have <br />a relatively high organic content. Alkalioi ty and salinity are low. <br />The terrace lands have good natural drainage, but the lands with reduced <br />slope in the valley bottoms would develop dra~nage deficiencies with <br />irrigation and would require artificial drains. <br /> <br />Land use is influenced to a marked degree by climate. 1he average <br />frost-free period is 59 days and the average irrigation season is 112 <br />days. 'I'he avemge annual precipitation is about 23 inches, 5 to 6 <br />inches of which usually occurs during the irrigation season. <br /> <br />. <br /> <br />Nonirrigated lands in the unit area are devoted mainly to the pro- <br />duction of dry-land wheat while those with a partial irrigation supply <br />produce alfalfa, small grains, and pasture. With adequate irrigation <br />provided by the Wessels unit, dairying is expected to be the main fam <br />,enteIprise. In support of the dairy industry unit lands would be devoted <br />to production of alfalfa, small grains, and pasture. Some other types <br /> <br />26 <br />