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Contours (20-foot interval) showing altitude of the bedrock surface in feet above NGVD 29 underlying the alluvium in the Lower Arkansas River Valley, Southeast Colorado. Source contours scale was 1:62,500. All digitizing and geoprocessing was done using ArcGIS Desktop v10 (Environmental Systems Research Institute, 2011)
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Boundary of the alluvium in the Lower Arkansas River Valley, Southeast Colorado. Boundary defined by extent of available bedrock information and geologic maps. Also includes approximate shoreline of John Martin Reservoir in Bent County, Colorado. Scale of maps used for digitization was 1:62,500. All digitization and geoprocessing was done using ArcGIS Desktop v10 (Environmental Systems Research Institute, 2011)
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Points representing locations of wells in which water levels were measured, and values of water-level altitudes above the National Geodetic Vertical Datum of 1929 for June 1 to November 30 (hereafter defined as "fall") and December 1 to May 31 (hereafter defined as "spring"), 2002, 2008, and 2015 in the Lower Arkansas River Valley, Southeastern Colorado. Water-level values, John Martin Reservoir lake levels, and land surface altitudes at monitoring wells were gathered from the U.S. Geological Survey National Water Information System (NWIS) and the U.S. Army Corps of Engineers. All geoprocessing was done using ArcGIS Desktop v10 (Environmental Systems Research Institute, 2011).
    map background search result map search result map Bedrock contours underlying the alluvium of the Lower Arkansas River Valley, Southeast Colorado Boundary of the Alluvium in the Lower Arkansas River Valley, Southeast Colorado Wells and water-level altitude in the alluvium in the Lower Arkansas River Valley, Southeast Colorado, Spring and Fall 2002, 2008, and 2015 Wells and water-level altitude in the alluvium in the Lower Arkansas River Valley, Southeast Colorado, Spring and Fall 2002, 2008, and 2015 Boundary of the Alluvium in the Lower Arkansas River Valley, Southeast Colorado Bedrock contours underlying the alluvium of the Lower Arkansas River Valley, Southeast Colorado