4.2.5. Special Rules.Certain types of federal acquisitions raise unique compensation questions that have led the courts to craft special valuation rules with limited applicability, which is discussed in Section 4.11. The general principle that just compensation does not include value created by the United States has specific implications in the appraisal of riparian lands involving the United States’ navigational servitude (Section 4.11.1) and of ranch lands involving federal grazing permits (Section 4.11.2). Similarly, the valuation of public roads, infrastructure, and facilities sometimes requires special treatment to ensure that compensation will reflect the owner’s loss, not the government’s gain (Section 4.11.3).