The California Coastal Commission has a great deal of authority when it comes to issues relating to the coast. So when it approves guidelines they attract attention. The most recent guidelines have brought controversy. As there is no real data on sea level rise by the end of this century just learned guesses based upon what might happen if all the effort underway to curb temperature increase comes to little or to nothing. But the Commission has taken an advanced position by declaring in its guidelines that we should, in California, prepare for a 10 foot increase in sea level rise by 2100. That is a mighty big increase! That means, roads, sewer systems, water systems and the destruction of property on a staggering scale. And imagine what beaches will be left? One can well image not many will survive. Because of a multitude of dams there is not much sand production any more and most sand well be swept away. Many beaches would just consist of the remaining rock. A dire prospect.