Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Active USGS surface water gaging stations (sites). A site is considered active if: (1) it has collected time-series (automated) data within the last 183 days (6 months), or (2) it has collected discrete (manually collected) data within 397 days (13 months). If it does not meet these criteria, it is considered inactive. Downloaded from NWIS (National Water Information System) Mapper on 13 May 2016. http://maps.waterdata.usgs.gov/mapper/index.html</SPAN></P></DIV></DIV></DIV>