Fermi Site Office CX Determinations

Determination Date Name of Action: Description Categorical Exclusion Number
6/2/2022 NEPA EENF for Mahoney Creek Floodplain Construction B1.33, B2.5
6/2/2022 Mahoney Creek Stormwater Detention Basin CX B1.33, B2.5
3/23/2022 National Environmental Policy Act Determination at Fermi National Accelerator Laboratory – Nevis Blocks Removal B1.10; B1.30
1/20/2022 NEPA EENF for LBNF Far Site Process WW for Underground Discharge B1.6
1/20/2022 LBNF Far Site Process Wastewater for Underground Discharge B1.6
11/3/2021 National Environmental Policy Act Determination at Fermi National Accelerator Laboratory –Surface Soil Sampling of Proposed Mahoney Creek Floodplain Mitigation Area B3.1
9/22/2021 Fermilab Welcome and Access Center (FWAC) B1.15
8/10/2021 Geotechnical Investigation of Proposed Mahoney Creek Floodplain Mitigation Area B3.1
3/30/2021 National Environmental Policy Act Determination at Fermi National Accelerator Laboratory-Target System Integration Building B1.15
2/24/2021 Utilities Infrastructure Project CX at Fermilab B1.15, B1.16, B1.18, B2.5, B4.11, B5.4
* Implicit in CX determinations are the following:
  1. There are no extraordinary circumstances related to the proposed action that may affect the significance of the environmental effects of the proposed action.
  2. The proposed action is not “connected” to other actions with potentially significant impacts.
  3. The proposed action is not related to other proposed actions with cumulatively significant impacts.
  4. The proposed action is not precluded by 40 CFR 1506.1 or 10 CFR 1021.211.
  5. For CX determinations made prior to November 14, 2011, CX number definitions can be found at: http://energy.gov/sites/prod/files/nepapub/nepa_documents/RedDont/CXR-10CFRPart1021-Changes.pdf