What was that FW corridor prior to the construction of the GC? Frankly, it looks like the brush and tree vegitation probably was originally across the area where the FW traverses. If they did some of these hole corridors similar to Whistling Straits, where they basically excavated and scraped the lower level to get fill and material for feature work on upper level, or benched/stairstepped a flat corridor in the slope, without something underneath to shore up the weight of the rest of the hillside above... well that is an awful lot of weight on loose and newly disturbed ground.
Maybe this isn't all that uncommon to new courses on slopes. What did they call it before Trump bought it, Ocean Trails? That was the Dye construction group. Not exactly chimps when it comes to construction. The lawsuits the ensued over Arcadia Bluffs brought out some construction technique lessons. I'm not so sure that Warren Henderson recovered his biz after the event. The event was a freak at AB. Yet, there were apparent lessons to be learned about drainage and hillside support, etc. Didn't they have a landslide at Valley Club of Montecito that altered #15 or 16 many years ago? These things happen, but it might be contentious in the aftermath.
I really think Gil is a fine architect. I hope Gil weathers this issue because it isn't the first nor will it be the last time such will occur. I think it comes with the newly constructed landscape activity, whether it is a golf course or other development. Another of our favorite courses was built on the "Missouri Breaks" and sure enough, it breaks.
Now this is a whole separate issue IMO from the "model" of a CCFAD effect on the local golf scene topic we bantered around earlier in the tread.