I've been Canyoneering for nearly two decades, and over the past couple years it seems that anchor rigging has been changing in the canyons. I contribute this to several factors to include new younger blood entering the canyoneering realm and that newer younger blood not being properly trained on how anchors should be set up.
If you haven't checked out our Live Stream we did on Anchor Dynamics, now would be a good time to go back and review this video: Anchor Dynamics Live Stream
I have seen the single strand webbing hanging over and edge anchor popping up more and more in the past couple of years. This anchor has it's place to be used, but the nuances and dangers of the anchor must be understood and the understanding that the anchor is neither redundant or backed up. If the single strand of webbing breaks, it breaks and the person hanging on the end of the webbing / On Rappel is going to fall. This occurred several years ago and one of the more public incidences in Constrychnine canyon. A group of about 30 were rappelling on the same anchor and the same piece of webbing 2/3 of the way through the canyon when about #16 got on rappel and hung over the edge and the webbing snapped dropping the rappeller about 60 ft. to the canyon floor. This could have been prevented with simple measures being taken and some forethought in the anchor and group management.
This video is Part 1 Check out the next post for Part 2