I realize this is off-topic for Pinnacles, but I need some expert recommendations from people who have experience with canyoneering as well as climbing. I do not want to be flamed by stupidity on Supidtopo.
I am helping develop a climb that is in a canyon that normally has low water flow, but at times can have high flow (> 200 ft^3/sec) that will go over the belay/rappel anchors. To be clear, there is also canyoneering going on in this canyon, but the climb is to the side of the waterfalls and normal water flow. Canyoneers have told me that they use webbing and a rappel ring at rappel locations, but to me it seems stupid to have to replace webbing every time you do the climb (I remember when I had to do this at Pinnacles and hated it). I want something more permanent. Canyoneers have told me that they do not use chains because during water flow over the chains, they get abraded sufficiently that they have to be replaced frequently.
Does anyone in this group have suggestions for what to use for anchors that are used for rappelling that occasionally will be subjected to high water flow over them and will not be degraded much by the water flow, i.e., will last many years without the need for replacement? Would very large chain work? Just to be clear, this is in a location where very, very few people go and there is a lot of metal junk around, left over from heavy construction in the area, so larger metal items will not be much of an eyesore.
This is not a place in the Pinnacles - I do not know anywhere in the Pinnacles that can get > 200 ft^3/sec flow. Thanks.
