Description: This shapefile depicts the draft proposed Critical Groundwater Area subarea boundaries for the Division 512 Rulemaking (2023). The draft proposed boundaries depicted in this shapefile are the draft proposed version as of 10/31/2023. A CGWA subarea is a portion of a groundwater reservoir that shares similar hydrogeologic properties and similar groundwater conditions including groundwater level elevations, seasonal and annual water level trends, and response to natural and human stresses. The intent of dividing a CGWA into subareas is to group wells that similarly impact the local portion of the groundwater reservoir and where reductions in groundwater pumpage, through voluntary or regulatory action, will have a timely, measurable, efficient, and similar groundwater response within that sub area.
Copyright Text: Oregon Water Resources Department
Groundwater Section