| Answer | Crossword Clue |
|---|---|
| ICEJAM | Winter river obstruction |
| SNAG | River obstruction. |
| backwater | water turned back in its course by an obstruction, or an opposing current, as in a river channel, or across a river bar |
| backwaters | BACKWATER, water turned back in its course by an obstruction, or an opposing current, as in a river channel, or across a river bar |
| ICEDAM | Winter river blocker |
| ICEDAM | Winter river blockage |
| NEVA | Winter Palace river |
| grilse | a young Atlantic salmon returning to its native river to spawn for the first time after one winter at sea |
