California Code, Water Code - WAT § 11588

Whenever the right of occupancy of any person upon national forest or national park lands is terminated because of the construction of the project, the department shall, in connection with the construction of the project, acquire, by purchase or condemnation, any buildings or improvements constructed upon such lands by the person. In any such purchase or condemnation proceedings, the department shall pay the value of the improvements in place as the value existed prior to revocation of the federal permit or their replacement cost, less depreciation, whichever is lesser.

This section is not applicable to improvements located on rights-of-way across national forest or national park lands.