Woodjam

Straining against the last light, I finally got it tied on and tossed it out to the top of the woodjam.

Source: wiktionary

[…] to treat potential chronic and catastrophic sedimentation problems caused by forest roads, restore riparian areas and re-establish large woodjams at ecologically appropriate sites.

Source: wiktionary

Fishes (especially small ones) often use complex hiding cover such as roots,wood jams, or aquatic macrophytes to avoid predators.

Source: wiktionary

In the anastomosing river model, stable alluvial deposits associated with woodjams can resist lateral channel erosion for hundreds of years, providing sites for tree germination.

Source: wiktionary