Collectively, the Pebble Partnership and Northern Dynasty have invested ten years and approximately US $150 million on multi-disciplinary environmental and socioeconomic studies to support project planning and design for Pebble. This work was undertaken by some 500 leading scientists and technicians working for more than 50 independent consulting firms, comprising one of the most exhaustive environmental study programs in the history of US mineral development.
In February 2012, the Pebble Partnership released its Environmental Baseline Document (EBD)
containing 27,000 pages of scientific data and analyses characterizing a broad range of environmental and social conditions in southwest Alaska. This massive investment in scientific research not only reflects the Pebble Partnership's commitment to protect fish, water and other environmental values when developing the Pebble Project. It also represents a significant asset to the Pebble Partnership as it prepares to initiate permitting under the National Environmental Policy Act (NEPA). Data collection and other preparatory work is ongoing.