The biggest obstacle on this stretch of Birch is the Boggs Falls. It is an approximate 16 foot drop. This stretch of river is easily accessible as it is right beside the highway between Birch River and Boggs. An interesting feature found on the falls is a sluice that was cut into the solid rock to power a gristmill as shown in the extreme left of the picture.. Although the mill ceased to exist at least 50 years ago, the rock channel is there for eternity.