General Information:

The city of Tualatin obtained an ASR limited license in 2004. Up to 475 million gallons per year of injected treated water is authorized by the Oregon Water Resources Department and located within the Grande Ronde Basalt member of the Columbia River Basalts. Currently 1 ASR well and 1 ASR exploratory well are located on-site.

Following obtained from the city of Tualatin:                                                                                                

  • Well depth ~1000ft
  • Cost of planning and construction: $2.5 million
  • Cost to pump and treat: $1.35 per ccf

Additional Information:

Following Information obtained from the Oregon Water Resources Below Ground Storage Site Search:                                                                   

Aquifer thickness (ft): 182
Hydraulic Conductivity (ft/day): 14-19
Transmissivity (ft/day) : 2500-3500
Static Water Level (ft): n/a
Specific Capacity (gpm/ft): n/a
Storativity: n/a

Documents, links, and additional information:

Woody, J. 2007. A preliminary assessment of hydrogeologic suitablity for aquifer storage and recovery (ASR) in Oregon. Master's thesis: Oregon State University