A half-dozen switchbacks were restored in the upper reaches of the Peters Ridge Trail, at the head of Browns Gulch.
A small bridge/crib was required on the uppermost switchback, shown here, where the trail had caved and been worn away due to a shortcut.
Here's the process:
Debris is used to block the shortcut that caused the trail to cave away.
A "perfectly crooked" and sound crib log is secured against bed rock at several points.
Large rock is added to the cribbing to keep smaller rock and dirt from migrating under the crib log.
The trail and switchback restored.