Little Spokane Groundwater Inventory & Mapping

The goal of the Little Spokane Groundwater Inventory and Mapping project is to develop a database of available information in tabular and GIS formats for use in intermediate estimates of water use, recharge, well yields and eventual use in the development of a numerical groundwater flow model.
The project consists of the following components:
  • Collection and processing of data for all water well logs available for the basin
  • Collection and processing of well depth, yield, and water level data for the basin
  • Development of an exempt well location and address database
  • Development of a hydrogeologic database
  • Collection of stream flow data for the basin
  • Evaluation of existing monitoring infrastructure
  • Evaluation of development potential within the basin
LSR Project

Project Update


The project was completed in June 2009. Below are links to the final report and figures.

  1. Figure 1-3 - WRIA 55 Water Well Logs (PDF)
  2. Figure 1-5 - WRIA 55 Deepened and Hydrofractured Wells (PDF)
  3. Figure 2-3 - WRIA 55 Water Well Yield Spatial Variation (PDF)
  4. Figure 2-4 - WRIA 55 Water Well Total Depth Spatial Variation (PDF)
  5. Figure 2-5 - WRIA 55 Water Well Static Water Level Spatial Variation (PDF)
  6. Figure 4-3 - Little Spokane River Stratigraphic Model Cross Sections (PDF)
  7. Figure 5-1 - WRIA 55 Stream Flow Measurement Locations (PDF)
  8. Figure 6-1 WRIA 55 Groundwater Elevation Monitoring Opportunities (PDF)
  9. Little Spokane Groundwater Inventory and Mapping Final Report (PDF)