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A bathymetric survey of Gillham Lake, Arkansas, was conducted in late June 2018 by the Lower Mississippi-Gulf Water Science Center of the U.S. Geological Survey (USGS) using methodologies for sonar surveys like those described by Wilson and Richards (2006) and Richards and Huizinga (2018). Data from the bathymetric survey were combined with data from an aerial Light Detection And Ranging (LiDAR) survey conducted in 2016 by the National Resources Conservation Service (U.S. Geological Survey, 2017) to create a digital elevation model (DEM) of the extent of the flood pool of the lake and compute volume (storage capacity) of the lake at 1-foot increments in water surface elevation from 431-559 feet (ft) above the North...
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This is a shapefile and coverage that outlines the area underlain by coals in the lower Blackhawk Formation, southern Wasatch Plateau coal assessment area. The polygons delimit the area within which resources were calculated and reported.


    map background search result map search result map Bathymetry and Storage Capacity of Gillham Lake, Arkansas (ver. 1.1, April 2020) Boundary delimiting the area within which coal resources were calculated, southern Wasatch Plateau (wsbndg) Data points (drill locations) used in the assessment of coal in the southern Wasatch Plateau, UT (wsptg) Structure contours on top of the Star Point Sandstone, southern Wasatch Plateau, UT (wsstrcg) Isopachs of total net coal, lower Blackhawk Formation, southern Wasatch Plateau, UT (wsthkg) Bathymetry and Storage Capacity of Gillham Lake, Arkansas (ver. 1.1, April 2020) Boundary delimiting the area within which coal resources were calculated, southern Wasatch Plateau (wsbndg) Isopachs of total net coal, lower Blackhawk Formation, southern Wasatch Plateau, UT (wsthkg) Structure contours on top of the Star Point Sandstone, southern Wasatch Plateau, UT (wsstrcg) Data points (drill locations) used in the assessment of coal in the southern Wasatch Plateau, UT (wsptg)