Allegheny County Hydrology Lines
<p><span style='font-size:10.0pt;
line-height:107%;font-family:&quot;Tahoma&quot;,sans-serif'><span style='mso-no-proof:
yes'>The Hydrology Feature Dataset contains photogrammetrically compiled water
drainage features and structures including rivers, streams, drainage canals,
locks, dams, lakes, ponds, reservoirs …