Base of Principal Aquifer for Parts of the North Platte, South Platte, And
U.S. Department of the Interior Prepared in cooperation with the Scientific Investigations Map 3310 U.S. Geological Survey North Platte Natural Resources District, South Platte Natural Resources District, Twin Platte Natural Resources District, Conservation and Survey Division of the University of Nebraska-Lincoln, and the Nebraska Environmental Trust Sheet 1 of 2 104° 103° 102° 101° 104° 103°30’ 103° 102°30’ 102° 4,500 State Route 4,400 17 4,500 4,400 e 2 t u State Route 27 4,450 4,350 oR e 42° t a tS State Route 87 4,300 State Route 29 4,250 4,400 4,450 US Route 385 4,300 4,550 4,500 State Route 250 4,500 0 4,350 5 4 , 4 4,400 4,400 4,350 4,400 4,350 4,350 4,350 State Route 2 4,300 4,300 4,150 41° 4,250 4,200 4,300 4,150 4,250 US Route 26 4,100 4,100 4,300 4,150 4,250 4,350 Index map 4,350 North Platte Natural 4,150 Resources District EXPLANATION 4,100 4,200 4,100 4,350 State Route 156 4,050 4,150 South Platte Natural Resources District (NRD) 4,350 4,100 airborne electromagnetic area 4,000 4,100 Twin Platte Natural 4,100 4,300 Resources District Twin Platte NRD airborne electromagnetic area 4,050 4,000 4,050 4,100 3,950 North Platte NRD airborne electromagnetic area 3,900 4,200 4,200 2010 airborne electromagnetic flight line 4,050 4,200 4,250 4,200 4,250 2008 and 2009 airborne electromagnetic flight line 3,950 4,250 4,250 (Abraham and others, 2012) 42° 4,000 4,250 4,000 3,950 South Platte Natural 4,050 4,200 Cooperative Hydrology Test hole 4,000 4,250 Resources District Study boundary 4,150 4,150 3,850 3,900 4,200 3,950 3,900 Base from National Atlas of the United States, 2014 030 60 MILES Shaded relief from Esri, 2013 3,900 4,100 Lambert Conformal Conic projection 3,800 3,850 4,150 4,150 4,150 Horizontal coordinate information is referenced to the 4,100 Creek 0 30 60 KILOMETERS North American Horizontal of 1983 (NAD 83) 3,800 3,950 4,100 3,850 3,850 3,750 4,100 92 92 4,100 Figure 1.
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