as long as its a paddle raft, the current flows are more than enough. the stretch from new gen to the slot might be a tad technical but from below the slot down is all commercially run in 12' commercial rafts daily. if you have a good crew it will be pretty damn easy.
the flow difference between the upper and lower is deceiving, the upper is tight and technical while the lower is wide and bony. expect a lot less gradient on the lower, in a much wider streambed, which results in way more shallows to scrape over, whereas the upper only has a few of those sections. the extra water isnt really noticeable due to the wider streambed. the bible says the lower is runnable to about 200 on the Almont gauge; i personally get sick of the scraping and rock bashing at that level and I usually call it quits on the lower at around 250 @ Almont.
the only factor to watch is streamflow. it was at 400 (@ the Dam) this weekend, its already at 300 now, they may shut it off completely here this week, which they do every year in the last couple of weeks of August, usually below 150 @ the Dam. I havent heard final concrete plans yet, so you may want to call Three Rivers in Almont (970) 641 1303 (ask for Vito) to see if they know anything.....otherwise watch the gages and pray.
it becomes unworthwhile below about 200 (@ the Dam).
"Don't f$&@ing eddy out, just run it! Whaddya doin??" -LMyers