That risk assessments be carried out when planning for any shoreline construction. If the development being constructed results in any form of risk to the population it must be designed to cope with the expected sea level rises. The risk assessment does not need to be carried out on existing facilities, small or interim projects that do not increase risk for the public.
Sea Level Rising Projections
The Golden Gate tidal gauge (the oldest continuously operating tidal gauge in the united states) has recorded a 20.3 cm rise in sea level in the San Francisco Bay over the last century. (Cayan. D 2010).
Future projections indicate an accelerating rate of sea level rise over historical trends. By circa 2050 a rise of 28 cm to 50 cm and possibly 76 cm to 140 cm by 2100. (Californian Energy Commission)(Cayan D et.al.2012)
San Francisco has concerns about the different sea levels that have been touted, and as such have tried to work out on different fallback positions. There are 2 diagrams that show what San Francisco would look like if there was a 7 m rise and then at an extreme of a 60 m rise in the sea levels. These are dramatic increases however they are given so that worst case scenarios can be ascertained and worked out.