Hydrologic Atlas (HA) maps, Ohio River corridor, Kentucky

<p style='box-sizing:border-box; color:rgb(51, 51, 51); font-family:open_sansregular, sans-serif; font-size:12.6px; margin-bottom:0.5em; margin-top:0.5em;'>This web map is a&nbsp;<span style='font-family:open_sanssemibold, sans-serif;'><span style='box-sizing:border-box;'><strong>Hydrologic Atlas (HA)</strong></span></span>&nbsp;map series for the Ohio River corridor of Kentucky. It is comprised of a set of fourteen (14) USGS HA maps from Catlettsburg (Boyd County) to Wickliffe (Ballard County).</p><p style='box-sizing:border-box; color:rgb(51, 51, 51); font-family:open_sansregular, sans-serif; font-size:12.6px; margin-bottom:0.5em; margin-top:0.5em;'>Two sets of borehole point data were extracted from registered HA map images: 1)&nbsp;<span style='font-family:open_sanssemibold, sans-serif;'><span style='box-sizing:border-box;'><strong>bedrock altitude</strong></span></span>&nbsp;- feet msl, and 2)&nbsp;<span style='font-family:open_sanssemibold, sans-serif;'><span style='box-sizing:border-box;'><strong>borehole lithology -&nbsp;</strong></span></span>total thickness, clastic thickness, and clastic percent.</p>