| Urban/Developed |
| Snow/Ice |
| Agricultural |
| Open Water |
| Bare Ground |
| Short, Sparse Dry Climate Grass |
| Low Load, Dry Climate Grass |
| Low Load, Very Coarse, Humid Climate Grass |
| Moderate Load, Dry Climate Grass |
| Low Load, Dry Climate Grass-Shrub |
| Moderate Load, Dry Climate Grass-Shrub |
| Moderate Load, Humid Climate Grass-Shrub |
| Low Load Dry Climate Shrub |
| Moderate Load Dry Climate Shrub |
| Moderate Load, Humid Climate Shrub |
| Low Load, Humid Climate Timber-Shrub |
| High Load, Dry Climate Shrub |
| Low Load, Humid Climate Shrub |
| Very High Load, Dry Climate Shrub |
| Low Load Dry Climate Timber-Grass-Shrub |
| Moderate Load, Humid Climate Timber-Shrub |
| Moderate Load, Humid Climate Timber-Grass-Shrub |
| Very High Load, Dry Climate Timber-Shrub |
| Low Load Compact Conifer Litter |
| Low Load Broadleaf Litter |
| Moderate Load Conifer Litter |
| Small downed logs |
| High Load Conifer Litter |
| Moderate Load Broadleaf Litter |
| Large Downed Logs |
| Long-Needle Litter |
| Very High Load Broadleaf Litter |
| Low Load Activity Fuel |
| Moderate Load Activity Fuel or Low Load Blowdown |