Rocky Flats Site CERCLA Five-Year Review Public Notice
The U.S. Department of Energy Office of Legacy Management is conducting a Five-Year Review of the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) remedy at the Rocky Flats Site, Colorado.
The purpose of the Five-Year Review is to evaluate remedy performance to determine if it remains protective of human health and the environment. The Rocky Flats Site remedy consists of institutional and physical controls, monitoring, and maintenance. The Rocky Flats Site Five-Year Review team will conduct a technical assessment of the remedy performance based on monitoring data, inspection, and surveillance reports; changes in risk assessment parameters; and other relevant information. Results of the Five-Year Review will be documented in a report to be completed by August 2027 and posted to the Rocky Flats Site webpage.
The previous Five-Year Review report, completed in 2022, is available at: Fifth Five-Year Review Report for the Rocky Flats Site, Jefferson County, Colorado.
For more information about the Rocky Flats Site, visit https://www.energy.gov/lm/rocky-flats-site-colorado or contact RFInfo@lm.doe.gov.
Information on the CERCLA Five-Year Review process and guidance for conducting Five-Year Reviews is available at: Writing Five-Year Reviews at Superfund Sites | US EPA.
Remediation at the Rocky Flats Site was conducted in accordance with Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) and/or Resource Conservation and Recovery Act (RCRA) regulations. Responsibility for operation and maintenance of the Site was transferred to LM in late 2005 and requires operation and maintenance of groundwater collection and treatment systems, groundwater and surface water monitoring, routine inspection and maintenance, records-related activities, and stakeholder support. For more information about the Rocky Flats Site, view the fact sheet, a tour, and the Rocky Flats History (through 2003).
The following information includes LM News articles about the Rocky Flats Site, Colorado.
- 08/26/2022 - Rocky Flats CERCLA Five-Year Review Completion Notice
- 01/20/2026 - Rocky Flats Site, Colorado, Marks Historical Milestone
- 02/02/2026 - Legacy Management Support Partner Contributes 36 Years to DOE Mission
- 04/28/2026 - Enhanced Website Brings to Life the Story of the Rocky Flats Site in Colorado
- 08/10/2026 - LM Presents 2025 Rocky Flats Site, Colorado, Annual Report Information to the Community
Rocky Flats Site 2025 Annual Report Virtual Meeting Recording
- Learn more about the Department of Energy Office of Legacy Management’s Rocky Flats Site located in Colorado. The three-part video series documents the process of transforming Rocky Flats from a nuclear production facility into an environmental asset surrounded by a national wildlife refuge in one of the most successful radioactive and hazardous waste cleanups ever completed.U.S. Department of Energy Office of Legacy ManagementLearn more about the Department of Energy Office of Legacy Management’s Rocky Flats Site located in Colorado. The three-part video series documents the process of transforming Rocky Flats from a nuclear production facility into an environmental asset surrounded by a national wildlife refuge in one of the most successful radioactive and hazardous waste cleanups ever completed.U.S. Department of Energy Office of Legacy ManagementLearn more about the Department of Energy Office of Legacy Management’s Rocky Flats Site located in Colorado. The three-part video series documents the process of transforming Rocky Flats from a nuclear production facility into an environmental asset surrounded by a national wildlife refuge in one of the most successful radioactive and hazardous waste cleanups ever completed.U.S. Department of Energy Office of Legacy Management
- Site Documents Page
- Fact Sheet
- Rocky Flats Site Comprehensive Environmental Response, Compensation, and Liability Act
- Contact Records
- Corrective Action Decision/Record of Decision for Rocky Flats Plant (USDOE) Peripheral Operable Unit and Central Operable Unit
- RCRA Facility Investigation – Remedial Investigation/Corrective Measures Study – Feasibility Study Report for the Rocky Flats Environmental Technology Site (RI/FS/CRA)
- Quarterly and Annual Reports
- Rocky Flats Closure Legacy Report
- Rocky Flats History (through 2003)
Mailing Address:
DOE Office of Legacy Management Rocky Flats Site
11035 Dover St., Suite 600
Westminster, CO 80021-5587Email: rfinfo@LM.doe.gov
Phone: (720) 880-4350