Dangers include logjams and overhanging trees and stumps. Rising faster than anticipated, the dammed waters created vast logjams and half-submerged trees. Bars can also form mid-channel due to snags or logjams. The main dangers in the middle river are sweepers, downed trees, logjams and dams. Upstream of Rush, Wyalusing Creek is braided with logjams and strainers in places. Hazards include swift current, shallow water, sharp bends, logjams, boulders, and aufeis. Dangers below that include possible overhangs, logjams, and channel braiding. Downed trees and logjams are extreme hazards in high water, as are low bridges. The coho salmon have benefited the most from these logjams. Logjams are common, resulting in quiet pools and new river channels being formed. The logjams trap leaves and create deep pools. There were many smaller logjams on the Red River. The catastrophic logjams drew tourists in droves, as many as a thousand a day. Logjams are essential to the survival of healthy salmon populations. In efforts to 'rebeaver' areas of declined beaver populations, artificial logjams have been placed.