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, • <br />I <br />relative elevations of the river and the water table beneath the <br />facility (Figure 5.1-2) indicates that the hydraulic gradient is <br />towards the river from the north, which is consistent with the <br />observed water quality. <br />5.1.4 Monitoring <br />Limited groundwater quality and water level data exist from various <br />geotechnical studies and the water well. In addition, a monitoring <br />well (LO-1) was installed in the southwest corner of the permit <br />area. Geologic information and well completion data can be found <br />in Appendix 3.3-1. <br />5.1.5 Flood-Irrigated Land <br />All land along the Colorado River has the potential for flood <br />irrigation, given the relative elevations. However, the permit <br />area vicinity does not have any indication of historical flood <br />irrigation nor does the present land use suggest flood irrigation <br />has been used. A review of surface water rights from the Division <br />of Water Resources indicates that active irrigation is limited to <br />the south side of the Colorado River and one area on the north side <br />of the river, west of the permit area. This was confirmed by a <br />review of low altitude color aerial photographs of this area. Land <br />presently under irrigation is included in Figure 5.1-1. <br />5.1.6 Land Use <br />Presently, the permit area vicinity north of the river is used for <br />commercial/industrial and agricultural grazing. Some of the land <br />south of the river, on the upper terraces, is used for both grazing <br />and irrigated pasture (Figure 5.1-1). Much of the land adjacent to <br />the permit area is used for transportation corridors, namely I-70 <br />NCIG - Load Out Revision 5-3 ABC/1145/910620 <br />