| Acronym |
Definition |
| CA | Certification Acceptance |
| CAC | Citizens Advisory Committee |
| CADD | Computer Aided Design & Drafting |
| Caltrans | California Department of Transportation |
| CBS | City and Borough of Sitka |
| CDOT | Colorado Department of Transportation |
| CE | Categorical Exclusion |
| CE | Construction Engineering |
| CFL | Central Federal Lands |
| CFLHD | Central Federal Lands Highway Division |
| CFR | Code of Federal Regulations |
| CI | Construction Inspector |
| CJE | Critical Job Element |
| CM | Contract Modification |
| COB | Close of Business |
| COCO | Chief of Contracting Office |
| CODA | Coulee Dam National Recreation Area |
| COE | Corps of Engineers |
| COE | Construction Operations Engineer |
| ConnDOT | Connecticut Department of Transportation |
| COTR | Contracting Officer's Representative |
| CRLA | Crater Lake National Park |
| CRMO | Craters of the Moon National Monument |
| CTIP | Coordinated Federal Lands Highway Technology Implementation Program |
| CY | Calendar Year |
| CZ | Coastal Zone |
