Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>The focal point of a SWP program is the surface water time-of-travel delineation and the resulting map. The protection zones are defined as a three-tiered system - Zone A, B, and C. Zone A is an area ¼ mile wide on either side of the river or stream. It extends from an area ¼ mile downstream of the intake to an area that is 5-hour time of travel (TOT) upstream. Zone B is a two mile wide area on either side of the river or stream, extending upstream to a 25-hour TOT. Zone C is the remainder of the watershed, but can be refined by consideration of river hydraulics to determine channeled flow and critical contributing tributaries. Critical contributing tributaries are tributaries that contribute significant flow to the surface water intake, and therefore, have the potential to contribute significant contaminant loads.</SPAN></P></DIV></DIV></DIV>