Categorial Exclusions
Overview
Categorical exclusions are types of actions the DOE has determined do not individually or cumulatively have a significant effect on the environment. Therefore, these actions do not require an Environmental Impact Statement or an Environmental Assessment. DOE’s categorical exclusions are listed in Appendix B of its NEPA regulations at 10 CFR Part 1021 and in Appendix B of its DOE NEPA Implementing Procedures (June 2026).
In accordance with the DOE NEPA Implementing Procedures (June 2026), each DOE Program and Field Office will document and post online all categorical exclusion determinations. Posted categorical exclusion determinations will not contain information exempt from disclosure under the Freedom of Information Act, such as classified, trade secrets, or commercial or financial information.
CX Determinations
- 2026
- 2025
- 2025 (2023-022 REV 1) Nevada Space Proving Grounds Training Exercises
- 2025-026 Yucca Mountain Site Custodian Activities
- 2025-024 Building 12-31 Modifications
- 2025-023 Seismic and Remote Diagnostic Monitoring
- 2025-022 Offsite Seismic Monitoring Operations – CA, NV, UT
- 2025-021 Mercury Modernization
- 2025-020 CTOS Eastern Region Administrative, Warehouse, and Training Office Activities
- 2025-018 Offices, Unoccupied Buildings and Non-Operating Facilities
- 2025 (2023-001 REV 2) Ecological and Environmental Field Activities (Rev. 2)
- 2025-011 Special Technologies Laboratory (STL) Operations
- 2025-010 License for Skull Mountain Communications Site
- 2025-007 Weather Support for NNSS
- 2025-005 MSTS Washington D.C. Office Improvements and Lease
- 2025 (2023-012 REV 1) Los Alamos Operations
- 2025-003 Geotechnical Investigations
- 2024
- 2024-025 Buildings 06-912, 06-913, and 06-914 JLON Equipment Staging, Preparation, Machine Shop, and Storage
- 2024-019 NCSO/NNSA Cooperative Agreement 2025
- 2024-017 Electric Vehicle Charging Station Installations
- 2024-014 Switch Data Center Storage and Lease
- 2024 (2023-017 REV 1) Protective Force Training Complex Activities (Rev. 1)
- 2024-003 Mojave Global Change Facility Office Trailer Removal and Disposal
- 2024 (2023-018 REV 1) Mercury Shooting Range Lighting Upgrade (Rev. 1)
- 2024-002 Special Technologies Laboratory (STL) Demolition of Trailers
- 2024-001 (REV 1) Demolition of Buildings in Areas 1 and 23 (Rev. 1)
- 2023
- 2023-035 Livermore Operations (LO)
- 2023-024 Remote Sensing Laboratory – Andrews Operations (RSL-A)
- 2023-020 USAF North Las Vegas Facility Temporary Office Installation
- 2023-019 Transport of Large Equipment
- 2023-004 Building 06-CP-71, Fire Station #2 Dormitory, Characterization and Demolition
- 2023-003 REV 1 Demolition of Buildings in Areas 12 and 23 (Rev. 1)
- 2022
- 2022-021 Engagement Simulation System (ESS) Training
- 2022-017 Area 2 Office Trailer Disposal
- 2022-016 Construction of Indoor Firing Range
- 2022-015 Area 6 Device Assembly Facility (DAF) Geotechnical Investigation
- 2022-011 Building 23-118 Certified Packaging Center (CPC)
- 2022 (2022-010 REV 1) Demolition, Removal, and Disposal of Structures in Area 12 Camp
- 2022-005 Remote Sensing Laboratory San Diego
- 2021
- 2021-044 Procurement of Protective Forces Services
- 2021-035 Nevada Desert Research Center (NV Desert FACE and Mojave Global Change Facilities)
- 2021-022 Desert Research Institute Frank Rogers Building
- 2021-017 Area 12 Sensitive Compartmented Information Facility (SCIF)
- 2021-016 Mobile Test Bed Capability Project – Construction
- 2021-014 Nuclear Accident Dosimetry (NAD) Laboratory
- 2021-006 Demolition of 13 Buildings at CP Hill
- 2021-001 UXO Rocket Warhead
- Archived CX Determinations