CRM modelling
The running of the CRM only takes place if the two other obstacle overlay methods have failed. It may take place in some states as a matter of routine. However, for those of us who have spent some time looking at the mathematical basis of it, it does not stand up!
Unfortunately, the obstacle evaluation surfaces are counter risk intuitive, so you get worse obstacle environments when you do not have guidance over the obstacles. Just look at the surface for a slope to a Code 1 runway on a visual approach.
You may well need a step down fix limitation in relation to the obstacle that you discuss.
The Athens rock blowing was for departure slope conditions, from memory.