Skip to main content
U.S. flag

An official website of the United States government

Here’s how you know

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

HTTPS

Secure .gov websites use HTTPS
A lock (LockA locked padlock) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

    • Environmental Topics
    • Air
    • Bed Bugs
    • Cancer
    • Chemicals, Toxics, and Pesticide
    • Emergency Response
    • Environmental Information by Location
    • Health
    • Land, Waste, and Cleanup
    • Lead
    • Mold
    • Radon
    • Research
    • Science Topics
    • Water Topics
    • A-Z Topic Index
    • Laws & Regulations
    • By Business Sector
    • By Topic
    • Compliance
    • Enforcement
    • Laws and Executive Orders
    • Regulations
    • Report a Violation
    • Environmental Violations
    • Fraud, Waste or Abuse
    • About EPA
    • Our Mission and What We Do
    • Headquarters Offices
    • Regional Offices
    • Labs and Research Centers
    • Planning, Budget, and Results
    • Organization Chart
    • EPA History

Breadcrumb

  1. Home
  2. Cleanups at Federal Facilities

Rocky Mountain Arsenal Spotlight

Rocky Mountain Arsenal Federal Facility Superfund Site

Previous Slide
Next slide
Four photos showing land before and after industrialization

OVERVIEW - Just 10 miles northeast of Denver, Colorado lies one of the largest urban wildlife refuges in the country, an area that only 30 years ago was listed on the Superfund National Priorities List due to being contaminated by over 600 chemicals. The Rocky Mountain Arsenal National Wildlife Refuge has been transformed from a 17,000+ acre facility used for weapons and chemical manufacturing into a beautiful nature sanctuary.
(1 of 9)

Rocky Mountain Arsenal

SITE HISTORY - Rocky Mountain Arsenal was listed on the NPL in 1987. The cleanup was completed in 2010 and five large parcels of land have been deleted from the NPL, creating opportunities for reuse development and expansion of the Refuge.
(2 of 9)

RMA Cleanup site

CLEANUP - The remedy selected for the Rocky Mountain Arsenal included the removal of contaminated soil down to 10’ over much of the contaminated area, which is contained in two hazardous waste landfills that remain on the site. Waste that was left in place is now interred beneath large engineered covers that prevent intrusion by humans or animals, and also prevent further contamination of groundwater. Groundwater is also pumped and treated at the site.
(3 of 9)

Stadium for the Colorado Rapids professional men’s soccer team

REDEVELOPMENT - Commerce City, CO a northern suburb of Denver, and a sports enterprise business have invested more than $120 million in the property, which yields 1.7 million visitors annually. A civic center, high school, soccer complex and public open space are also located here.
(4 of 9)

Wildlife Refuge with Bald Eagle

CREATION OF WILDLIFE REFUGE In the 1980’s a roost of bald eagles, which were then on the Endangered Species List, was discovered. In 1992, Congress designated the sites as a wildlife refuge. As cleanup progressed, the Army transferred most of the land to the U.S. Fish and Wildlife Service.

Photo source: Dave Showalter 
(5 of 9)

Pond in the Rocky Mountain Arsenal National Wildlife Refuge

Mayor Pro Tem René Bullock, who also sits on the Board of Directors for the Friends of the Front Range Wildlife Refuges, stated "As a decades-long participant in transitioning this site from munitions manufacturing to wildlife sanctuary, I can honestly say the Refuge is an shining example of promises made, promises kept and should serve as the gold standard for how to make former Superfund sites benefit the communities in which they are located."

Photos source: US Fish and Wildlife Service
(6 of 9)

Welcome to Your National Wildlife Refuge System sign

TOURISM - Nearly 500,000 people annually visit the 15,000-acre Rocky Mountain Arsenal National Wildlife Refuge where they can see more than 330 species of animals including bison, deer, bald eagles and black-footed ferrets.

Photo source:CBS Denver
(7 of 9)

Commerce City

BENEFIT - Cleanup of the Rocky Mountain Arsenal has bolstered the economy of the greater Denver metro area and provides its neighbors with jobs, recreation, and a peaceful escape to nature.
(8 of 9)

People gathered, bicycling and playing on park equipment

"The Refuge and adjacent property represent a public-private partnership done right," said Mayor Sean Ford. "Without the support of multiple federal agencies – including the EPA – Commerce City would have not been able to leverage a remediated property into a true community asset."  Other key partners include Colorado Department of Public Health and the Environment, the local health department and local government officials, the Army, U.S. Fish and Wildlife Service and Shell Oil Company.  For more information please visit U.S. Fish and Wildlife's Rocky Mountain Arsenal website.

Photo source: Denver Post 
(9 of 9)

Access a text only version of the Rocky Mountain Arsenal Site Spotlight.

Cleanups at Federal Facilities

  • Superfund Sites
    • Federal Agency Hazardous Waste Compliance Docket
    • Base Realignment and Closure (BRAC)
  • Restoration & Reuse
    • Military Munitions and Unexploded Ordnance (UXO)
    • Quality Assurance
  • Reuse Successes
    • Reuse Snapshots
    • Success Stories
    • Site Spotlights
  • Resources & Tools
    • FEDFacts
  • Long-Term Stewardship
  • Get Involved
Contact Us about Federal Facility Cleanups
Contact Us about Federal Facility Cleanups to ask a question, provide feedback, or report a problem.
Last updated on May 12, 2025
  • Assistance
  • Spanish
  • Arabic
  • Chinese (simplified)
  • Chinese (traditional)
  • French
  • Haitian Creole
  • Korean
  • Portuguese
  • Russian
  • Tagalog
  • Vietnamese
United States Environmental Protection Agency

Discover.

  • Accessibility Statement
  • Budget & Performance
  • Contracting
  • EPA www Web Snapshot
  • Grants
  • No FEAR Act Data
  • Plain Writing
  • Privacy
  • Privacy and Security Notice

Connect.

  • Data
  • Inspector General
  • Jobs
  • Newsroom
  • Regulations.gov
  • Subscribe
  • USA.gov
  • White House

Ask.

  • Contact EPA
  • EPA Disclaimers
  • Hotlines
  • FOIA Requests
  • Frequent Questions
  • Site Feedback

Follow.