Groundwater Mapping in WRIA 53

Final report is completed!

Groundwater Inventory and Mapping Project report

Attachment A

Attachment B

Figure 1 - Location/Topography

Figure 2 - Groundwater Wells Year Drilled w/Geology

Figure 3 - Total Depth Spatial Variation

Figure 4 - Groundwater Well Aquifer Type Delineation

Figure 5 - Static Level Spatial Variation

Figure 6 - Well Yield Spatial Variation

Figure 7 - Streamflow Measuring Stations

Figure 8 - Groundwater Wells being Monitored

The goal of this project is to collect, inventory and map available data on ground and surface water resources and the relationship to current and future land use in WRIA 53.  This information can be used immediately or as the foundation for further study to determine:

• Areas of limited water availability;
• Attempt to assess the groundwater aquifer areas in hydraulic continuity with surface waters using the groundwater data collected in Task 6 and Hawk Creek stream gauging flow data collected by Ecology to be conducted in 2009-2010;
• The existing magnitude of permit exempt withdrawals from an estimate of current permit exempt well consumptive use;
• The projected estimated future growth (20 years) from water use of permit exempt wells; and
• Subsurface geology and aquifers.

This information can also be utilized in the development of a numerical model for the watershed.  Currently a similar project is underway in the Little Spokane River Watershed (WRIA 55).    At this point the project is providing valuable information in a cost effective manner and is needed as a land use planning tool in WRIA 53.

For more information please contact Courtney at Lincoln County Land Services 509-725-7911.