Work Begins on Rockslide Blocking Forest Service Road 19 (Aufderheide Drive)

Release Date: May 4, 2018   Forest Service Road 19 (Aufderheide Drive)

Contact(s): McKenzie River Ranger District, 541-822-3381


The first phase of reopening Forest Service Road 19 (Aufderheide Drive) is now complete. This week engineers scaled 150-foot cliffs above the slide to remove unstable boulders and trees. This work helps ensure the safety of crews that will be working below the cliffs to remove the nearly 8,000 cubic yards of rocks and debris from the road. 

The second phase necessary to reopen the road will involve removing the debris and repairing the road. The Willamette National Forest is currently working with the US Army Corps of Engineers and other partners to determine the best method to remove the rock deposit. Work is expected to take several months. 

Aufderheide Drive and access to Terwilliger (also known as Cougar) Hot Springs has remained blocked from Highway 126 since a December 21, 2017 rockfall. The rock deposit is over 10,000 tons, 30 feet in height, and covers over 250 linear feet of road. The area is closed for public safety beginning 300 feet west of the intersection of Forest Road 19 and Forest Road 1993. The closure encompasses the west side of Cougar Reservoir from the west edge of the top of Cougar Dam and then south along Road 19 to Boone Creek.

It is now possible to reach Terwilliger Hot Springs by accessing Aufderheide Drive from Highway 58.  Forest Service Road 1993 is now open across Cougar dam, but many Forest Service roads that join the east bank of Cougar Reservoir with Aufderheide road have not been cleared and are not suitable for passenger vehicles. Cougar Crossing and Slide Creek campgrounds are open.    

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