Low flows out of Hells Canyon dam will start Wednesday (9/27) and run through Friday. For the purpose of some scientific study related Idaho Power's hydroelectric relicensing, the outflow will drop to 5,000 cfs, meaning the level at Heller Bar will be somewhere around 10,000-11,000. Some of the old boys around here are saying that unless a jet boater knows the river extremely well, they're better off staying away during this period.