- Acceptable Levee Condition
- British thermal unit (Btu)
- Brownfields
- Clean Water Act State Revolving Fund (CWSRF)
- Clean Watersheds Needs Survey (CWNS)
- Combined Sewer Overflows (CSOs)
- Combined Sewer Systems
- Congestion
- Culvert
- Dam Owner
- Dam Regulator
- Distributed Generation
- Double Stack
- Draft
- Dredge
- Dredging
- Earthen Levees
- Emergency Action Plan
- Energy Recovery from Waste
- Energy storage
- Energy Systems
- Enplanements
- Farebox Recovery
- Fixed Guideway
- Functionally Obsolete
- Green Infrastructure
- Grid
- High-Hazard Potential
- High-voltage Transmission Lines
- In-line Nondestructive Testing
- Intermodal
- Large Community Water Systems
- Large Hub Airports
- Leakage Surveys
- Levees
- LiDAR
- Lock Chambers
- Low-Hazard Potential
- Material Recovery Facilities (MWF)
- Medium Community Water Systems
- Medium Hub Airports
- Minimally Acceptable Levee Condition
- Municipal Solid Waste (MSW)
- National Priority List (NPL)
- Non-community Water System
- Nonhub Primary Airports
- Nonprimary Commercial Airports
- Passenger Trips
- Positive Train Control
- Remote Sensing
- Renewable Energy
- Resource Conservation and Recovery Act (RCRA)
- Sanitary Sewer Overflows (SSOs)
- Seepage
- Significant-Hazard Potential
- Small Community Water Systems
- Small Hub Airports
- Structurally Deficient
- Superfund or the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA)
- TEU
- Tipping Fee
- Unacceptable Levee Condition
- Vehicle Miles Travelled
- Waste Combustion
- Water Infrastructure Finance Innovations Authority (WIFIA)
