US ARMY Camp Bonneville RAU-3

RAU-3 includes the entire site where unexploded ordnance and munitions are located. Cleanup work has been conducted in phases through the site.

For cleanup purposes, Camp Bonneville has been divided into five remedial action units (RAU). These units are primarily grouped by the nature of the particular release, not by physical boundaries. Click here for information about the full site and other RAUs. 

Cleanup of RAU-3 is complete. In May, 2021, Ecology issued the final letter describing why we believe no further cleanup action is necessary and formally documenting that decision. You can read these No Further Action Letters for all four phases of the RAU-3 cleanup by clicking the links in the table below.

Cleanup was conducted in 4 phases.

Phase	Activity	Status
Phase 1	MEC sub-surface clearance to a depth of 14 inches on the Central Valley Floor, associated wetlands and Environmental Study Area.	Completed 2017
Phase 2	MEC surface clearance of demolition areas 1 and 2.	Completed 2017
Phase 3	Completed MEC surface and subsurface clearances at fifteen (15) hard target areas in the Central Impact Target Area (CITA) and firing points. CAP amended October 2017 after public review to include 100 acres of surface-only MEC removal and regular inspections of the cleared area within the CITA.	Completed 2021
Phase 4	MEC surface clearance of the Western Slopes Area.	Completed 2021

• In 1997, based on initial site investigations and archive searches, the Army determined that military munitions, including unexploded ordnance, are present in several areas throughout RAU-3.
• A draft Cleanup Action Plan for RAU-3 was finalized by Ecology in 2010 after public review and comment.
• In 2012, an Amended Prospective Purchaser Consent Decree, including the 2010 Cleanup Action Plan (CAP) for RAU-3, was finalized after public review. The Decree requires cleanup be completed at the entire Camp Bonneville Site.
• The final 2010 CAP for RAU-3 describes how the remaining munitions cleanup work will be conducted, and includes cleanup plans for each of the RAU-3 Remedial Work Areas. The final CAP also includes information about:
  • Munitions of explosive concern (MEC) and munitions-debris findings to date;
  • Accessibility, reuse, and hazard ranking considerations;
  • Cleanup action evaluation and selection and;
  • Recommended cleanup action(s)
  • Following public review and comment, this CAP was amended in October 2017 to update cleanup needed for Phase 3 CITA.