Water Management

Comprehensive Water Management Plan

The water management plan for Pebble addresses construction, operations, and closure in a comprehensive fashion.

  • The plan uses the 76-year synthetic record to properly design the water management systems in a way that exceeds normal standards
  • It integrates the significant groundwater and surface flow data to inform the water management system
  • Multiple water treatment plants designed with a cost of some $500 million to ensure the systems can manage the variation in flows seen in the 76-year record
  • The plan ensures sufficient water storage exists to manage inflows over the range of variable flows seen in the 76-year record
  • Detailed geochemical analysis informed the design in order to understand the likely nature of the water to be treated through construction, operations, closure and post-closure
  • Water treatment plant flowsheets were developed to deal with the water chemistry and the very stringent discharge criteria
  • The extensive environmental data was used to assess and understand the potential downstream impacts and ensure the water management plan minimizes those impacts

Site layout highlighting water management features