Raising/extending dikes. Where general protection from inundation is desired, building, raising and extending dikes is still an option. Given the expense and effort involved in dike construction as well as the cost to coastal resources, however, and given the projections of continued sea level rise, such protection may not be the most cost-effective solution, assuming that sea level rise may continue to top dike levels. Where necessary to protect substantial Tribal development investment, however, retaining existing diking may be useful and viable as a short-term option to allow time for more considered planning and implementation of long-range options, such as for retreat. Relocating major facilities and infrastructure requires long planning timelines and considerable funding, and maintaining protection in the interim with diking systems may in some cases be the reasonable short-term alternative.