There is no existing plan for the Manzanar National Historic Site. A general management plan is needed for the site to outline long-term strategies for dealing with resource protection and visitor use. Public Law 95-625 requires that general management plans be completed for each unit of the National Park System, and a general management plan is specifically mandated for Manzanar NHS by the authorizing legislation. General Management Plan - Manzanar National Historic Site (U.S. National Park Service)