See, e.g. , Davenport , 436 F.2d at 400-01 (valuation by appraiser who was correctly “instructed to appraise the ‘after’ value of the subject property considering the reservoir enhancement,” as a direct and special benefit of the government’s acquisition, was “the only [opinion] which has probative value and discloses the proper compensation”); see also Hendler , 175 F.3d 1374.