North Acres Rapid

At lower flows (< 500), this feature is just a small ledge wave.  At higher flows, a limestone shelf and concrete wall downstream back up the flow from the ledge and cause it to form a retentive, river-wide hydraulic.  The hydraulic has a nasty-looking pocket at river right, but running river left sets you up for strainers downstream.  A trail on the south side of the creek (river right, downstream of the pedestrian bridge) allows for easily portaging the feature or putting in below it (at the confluence of a small feeder creek.)

The hole is known to be in at about 800-2000 cfs.  Behavior at higher flows is unknown.