| ASTM | American Society for Testing and Materials |
| CF | Clay-Size Fraction |
| CPD | Computer Program Document |
| FC | Fines Content |
| GBE | Global Backward Erosion |
| HEC | Hydrologic Engineering Center |
| ICOLD | International Commission on Large Dams |
| IUS | Internally Unstable Soil |
| IWR | Institute for Water Resources |
| LL | Liquid Limit |
| NG | Narrowly Graded |
| NP | Non-Plastic |
| PI | Plasticity Index |
| PL | Plastic Limit |
| QC | Quality Control |
| RMC | Risk Management Center |
| UDF | User-Defined Function |
| U.S. | United States |
| USACE | U.S. Army Corps of Engineers |
| USCS | Unified Soil Classification System |
| USSD | United States Society on Dams |
| WG | Widely Graded |
