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| AD-ES | Assistant Director - Ecological Services |
| BLM | Bureau of Land Management |
| BR | Bureau of Reclamation |
| CEQ | Council on Environmental Quality |
| CERCLA | Comprehensive Environmental Response, Compensation and Liability Act of 1980 |
| CG | U.S. Coast Guard |
| Corps | U.S. Army Corps of Engineers |
| DHC | Division of Habitat Conservation |
| Director | Director, U.S. Fish and Wildlife Service |
| D-J | Dingell-Johnson Act (Federal Aid in Sport Fish Restoration Act) |
| DOI or Department | Department of the Interior |
| DOT | Department of Transportation |
| EA | Environmental Assessment |
| EC | Environmental Coordination |
| ED | Environmental Document |
| EIS | Environmental Impact Statement |
| EO | Executive Order |
| EPA | Environmental Protection Agency |
| ER | Environmental Review |
| ES | Ecological Services |
| ESA | Endangered Species Act |
| FAA | Federal Aviation Administration |
| FERC | Federal Energy Regulatory Commission |
| FHWA | Federal Highway Administration |
| FONSI | Finding of No Significant Impact |
| FWCA | Fish and Wildlife Coordination Act |
| ES Transmittal | ES Environmental Review Distribution Transmittal |
| MOA | Memorandum of Agreement |
| MOU | Memorandum of Understanding |
| NEPA | National Environmental Policy Act |
| NEPA Regulations | CEQ Regulations for Implementing the Procedural Provisions of NEPA |
| NOA | Notice of Availability |
| NOI | Notice of Intent |
| NPS | National Park Service |
| OEPC | Office of Environmental Policy and Compliance (001) |
| P-R | Pittman-Robertson Act (Federal Aid in Wildlife Restoration Act) |
| PNRS | Preliminary Natural Resources Survey |
| REC | Regional Environmental Coordinator (Service) |
| REO | Regional Environmental Officer (DOI) |
| SCS | Soil Conservation Service |
| Secretary | Secretary of the Interior |
| Service | U.S. Fish and Wildlife Service |
| SOW | Scope of Work |
| WO | Washington Office |