Simnasho Groundwater Remediation Project

Simnasho Groundwater Remediation Project

When the Confederated Tribes of the Warm Springs determined that a change of sources or treatment of its groundwater supply was required to meet EPA’s new maximum contaminant level standard for arsenic and maintain adequate water quality for the Simnasho Community, Akana engineers were called upon to conduct a Phase 1 engineering feasibility study to identify and evaluate options for bringing this water system into compliance as soon as possible and in the most cost-effective way.

Our team of water resource engineers, hydrogeologists and water quality experts developed a conceptual site model (CSM), identified possible locations of arsenic-free groundwater sources, performed a well evaluation, developed well modification options, and assessed riverbank filtration opportunities.  Following development of a working CSM, we developed a field study program targeting the highest-ranked option:  siting a new production well and adding a new reservoir in the vicinity of the well to serve storage and pressure requirements needed to accommodate future development of the area.  Development of a new supply well was determined to best achieve the objectives of minimizing ongoing operational costs and reducing future development costs.  In Phase 2 of the project, the preferred alternative was developed to preliminary and final design.

Project Details

Warm Springs Confederated Tribes
Warm Springs, OR

Services Rendered

  • Conceptual Site Modeling
  • Hydrogeological Study
  • Water Quality Analyses
  • Preliminary and Final Design
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