Oregon Water Resources Department
Well Report Mapping Tool User Guide

Understanding the Data


The information associated with the wells are from the well reports database.

The location of the wells uses best available locations from a variety of sources. These are:

  1. OWRD Groundwater sites located using information other than well logs, well inspections, and water rights, such as site visits.
  2. OWRD Other staff that have field visited
  3. OWRD Groundwater Sites using water rights point of diversions with good location information
  4. Exempt Use Maps, with the latitude/longitude identified by the land owner
  5. Well Reports with latitude/longitude provided on the well report or from other sources, as reviewed.
  6. OWRD Groundwater Sites using water rights points of diversions with less accurate location accuracy
  7. Center of the Township/Range/Section Quarter-Quarter Section, as identified on the well report
  8. Center of the Township/Range/Section , as identified on the well report



The Public Land Survey System (PLSS) is a way of subdividing and describing land in the United States. All lands in the public domain are subject to subdivision by this rectangular system of surveys, which is regulated by the U.S. Department of the Interior, Bureau of Land Management (BLM).