Army Rocky Mountain Arsenal

   Environmental Cleanup


The overall framework and rationale for the environmental cleanup are outlined in the RMA On-Post and Off-Post Records of Decision, or RODs. The documents were developed in collaboration with federal, state, and local regulatory agencies following an extensive environmental investigation of the site.

The 31 projects included in the On-Post ROD address the contamination of Arsenal soil, structures, and groundwater in the following ways:

Structures – More than 300 structures in the former manufacturing areas were dismantled and placed in Arsenal landfills or other covered consolidation areas. Additionally, approximately 150 more structures with no future use or history of contamination were demolished. More than 10,000 tons of steel were recycled from those structures.

Groundwater – Five groundwater treatment plants were constructed to treat groundwater on  and off  the site 24 hours a day, seven days a week. The groundwater treatment program will continue until all water leaving the site meets state and federal standards.

Soil – Contaminated soil was excavated and placed in the Arsenal’s consolidation areas and two on-site landfills. Following soil removal, the areas were backfilled with clean soil and seeded with native plants and grasses to return the site to a short-grass prairie.










Public Affairs

For further information, contact:


Learn More

Rocky Mountain Arsenal Wildlife Refuge

Offers year-round wildlife viewing, outdoor recreation and environment education opportunities.  Visit the Refuge online or call 303.289.0930.

Rocky Mountain Arsenal

6550 Gateway Road

Commerce City, CO 80022-1748