Wood - Upper Rio Grande Box
This is the section below the Rio Grande Reservoir.
About half way into the canyon itself, there is a river wide strainer. The first photo is of a river wide hole - which is clean, but right above the drop with the river wide strainer. You have time to pull over, but I would worry that if you had a swimmer they would go into the strainer - the second photo.
There is another river wide strainer (log - jam like) not too far past this. Easy to see from upstream. In a kayak you can skirt it on far left - but you need to be in control.