| Answer | Crossword Clue |
|---|---|
| SILT | River bottom substance |
| BED | River bottom. |
| BED | River bottom |
| HULL | River bottom? |
| SILT | River-bottom accumulation |
| PEBBLES | River-bottom surface |
| SILTED | Like a river bottom |
| DREDGES | Searches the river bottom |
| MUDCAT | Mississippi River bottom feeder |
| SILTY | Like a river bottom |
| DREDGING | Scooping up a river bottom |
| DALLES | Rapids above a flat rock river bottom. |
