Id. at 707; see United States ex rel. Tenn. Valley Auth. v. Powelson , 319 U.S. 266, 285 (1943) (“[T]he Fifth Amendment allows the owner only the fair market value of this property; it does not guarantee him a return of his investment.”); Olson v. United States , 292 U.S. 246, 255 (1934) (“[T]he market value of the property at the time of the [acquisition] . . . may be more or less than the owner’s investment. The public