Description: The OWRD defines seven 'zones of imact' to describe watersheds that include and are above areas (i.e. stream reaches) of significant groundwater discharge to surface water. To define boundaries for the local zones of imact, the OWRD considered sub-basin boundaries, locations where in-stream water rights or scenic waterway flows information, and other hydrogeologic information, including identification of stream reaches influence by groundwater discharge. By defining the boundaries for each of the local zones of impact, mitigation may be targeted to areas where mitigation projects may provide the greatest instream benefits.