Laserfiche WebLink
<br />0 <br />r.:~ <br />tv <br />CJ' <br />CP 4. <br />-..1 <br /> <br />Headcutting and sheet erosion destroy range and crop- <br />land, adds sediment to the streams and affects cro~ <br />production and livestock grazing capabilities. <br /> <br />5. A study by the U.S. Bureau of Outdoor Recreation in- <br />dicates large deficiencies in surface-water supplies <br />required for projected recreation demands in the AWR <br />Basin. <br /> <br />If these problems are not solved in the 1975-85 period, <br />they will continue during the period 1985-2000. <br /> <br />Problem Area No.2, High Plains Groundwater Irrigation, ASA <br />1105. During Activity 2 it was noted that in most areas where ground_ <br />water supplies are used for irrigation and for other purposes, the <br />groundwater is being mined and groundwater levels are being lowered. <br />There are five general areas in ASA 1105 where groundwater supplies <br />are used extensively for irrigation purposes; these areas are shown <br />on map at the end of "Problem Lists." <br /> <br />Except for the House area, located in the Houthwest corner <br />of Quay County, groundwater in storage is probably sufficient to <br />last through the period considered herein (1975-2000) and allow <br />for some expansion in irrigated acreage in other areas. In the <br />House area groundwater mining has lo~ered water levels as much as <br />40 feet in part of the area and pumping for irrigation is becoming <br />uneconomical. In this area about 3,000 acres are estimated to go <br />out of production by 2000. Elsewhere because of dwindling ground- <br />water supplies, irrigated lands will be reduced commencing shortly <br />after the year 2000. <br /> <br />Groundwater supplies used for irrigation in the areas of <br />Problem No. 2 are furnished from multiple-aquifer sources which in- <br />clude the Ogallala, Dakota, and Morrison Formations. In 1973 about <br />550 irrigation wells had been drilled in these areas. The average <br />static water level is about 200 feet and yields range from about <br />250 to 1,800 gallons per minute (gpm). The average yield is about <br />800 gpm. <br /> <br />At the present time none of the areas are located within declared <br />underground water basins. <br /> <br />The following tabulation shows acreage irrigated from ground- <br />water supplies in 1975 and the withdrawals and depletions from this <br />source. <br /> <br />107 <br />