Channel Material
| Chan Mat Cd | Chan Mat Nm | Chan Mat Ds |
|---|---|---|
| silt | siltmud | |
| unkn | unknown | |
| UNSP | Unspecified | The channel bed material was not specified. |
| SAND | sand | The channel bed was composed of sand. |
| GRVL | gravel | The channel bed was composed of gravel. |
| CBLS | cobbles | The channel bed was composed of cobbles. |
| BLDR | cobbles-boulders | The channel bed was composed of cobbles and/or boulders. |
| LDGE | bedrock-ledge-artificial | The channel bed was composed of bedrock, ledge or an artificial material like concrete or metal. |
