Categorical Exclusion Determinations: Hanford Office of River Protection and Richland Operations Office

Categorical Exclusion Determinations issued by Office of River Protection-Richland Operations Office.

Documents Available for Download

CX-033658: Site Characterization Borehole/Well Drilling at the Columbia Generating Station Washington Nuclear Plant (WNP-1) Site in Support of Energy Northwest and Amazon Development and Deployment of Advanced Small Modular Reactor Technology at the

On October 16, 2024, Amazon and Energy Northwest announced an agreement to fund efforts to develop and deploy advanced small modular reactor (SMR) …

Learn More about CX-033658: Site Characterization Borehole/Well Drilling at the Columbia Generating Station Washington Nuclear Plant (WNP-1) Site in Support of Energy Northwest and Amazon Development and Deployment of Advanced Small Modular Reactor Technology at the
CX-033657: Laser Interferometer Gravitational-Wave Observatory, Hanford, Cosmic Explorer Beamtube Experiment Laboratory (CEBEX Lab)

The NSF proposes to fund the construction of a vacuum tube test building at LIGO Hanford to inform and support future gravitational wave research. …

Learn More about CX-033657: Laser Interferometer Gravitational-Wave Observatory, Hanford, Cosmic Explorer Beamtube Experiment Laboratory (CEBEX Lab)
CX-032889: HMIS Annual Categorical Exclusion (CX) B2.5, Facility Safety and Environmental Improvements for CY 2025

Hanford Mission Integration Solutions (HMIS) and their subcontractors perform safety and environmental improvements of a facility (including, but n…

Learn More about CX-032889: HMIS Annual Categorical Exclusion (CX) B2.5, Facility Safety and Environmental Improvements for CY 2025
CX-032999: Central Plateau Cleanup Company (CPCCo) and its subcontractors perform siting, construction or modification, and operation of support buildings and support structures

CPCCo Annual Categorical Exclusion- B1.15 Support Buildings, December 2024 to December 2025…

Learn More about CX-032999: Central Plateau Cleanup Company (CPCCo) and its subcontractors perform siting, construction or modification, and operation of support buildings and support structures