 The portion of the river between Monaghan Rapids and Foster Creek Rapids was regarded as particularly hazardous.An 1893 report by the Army Corps of Engineers described the river from Monaghan Rapids to the foot of Foster Creek Rapids as "very swift and studded with rocks, and taken all in all will be found an extremely hard and dangerous if not absolutely impassable portion of the river to navigate".Over the from Monaghan to Foster Creek the river fell at low-water.