Lakes and Reservoirs (0)
| Perennial Lake or Reservoir |
| Intermittent Lake or Reservoir |
| Ephemeral Lake or Reservoir |
| Snowfield |
| Sewage Lagoon |
Minor Streams and Ditches (1)
| Intermittent Stream |
| Ephemeral Stream |
| Field Lateral |
| Drain Tile |
Major Streams and Ditches (2)
| Perennial Stream |
| Main Ditch |
| Lateral Ditch |
| Aqueduct - Elevated |
| Aqueduct - Underground |
| Slough |
Boulder County Open Space (3)
| County Open Space |
| Joint County and Municipal Open Space |
| Open Space Option |
Municipalities (4)
| Boulder |
|
| Erie |
| Jamestown |
| Lafayette |
|
| Longmont |
|
| Louisville |
|
| Lyons |
|
| Nederland |
|
| Superior |
|
| Ward |
|