While there is a healthy debate over just how much the sea level will rise over the next 50 years, there is at least a general consensus that the sea level will rise. What this means for those on the coast depends on the jurisdiction. Some jurisdictions will attempt to armor the coast, protecting the structures that exist for as long as they can. Others will pursue a policy of managed retreat, allowing the ocean to creep inward unabated. In California, the Coastal Commission has expressed a preference for managed retreat. However, because of the negative connotations associated with that…